81 results on '"Tarkan Unek"'
Search Results
2. A Study of Changes in Prohepcidin and Iron Levels in Patients with Liver Transplant and Chronic Viral Hepatitis
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Özlem ÖZDEMİR, Mesut AKARSU, Pınar TOSUN TAŞAR, Faize YÜKSEL, Aylin BACAKOĞLU, Tarkan ÜNEK, Fatih DEMİRKAN, and Sedat KARADEMİR
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liver transplant ,chronic viral hepatitis ,prohepcidin ,Medicine - Abstract
Aim:To study changes in hepcidin, a key protein synthesized in the liver, following chronic viral hepatitis, cirrhosis and/or liver transplant, as well as the effect of hepcidin level variation on liver function tests and iron levels.Materials and Methods:The patient population was distributed as follows: Group 1: inactive chronic hepatitis B (n=31); Group 2: chronic hepatitis C (n=30); Group 3: decompensated cirrhosis linked to hepatitis C virus (HCV) or hepatitis B virus (HBV) (n=29); Group 4: decompensated HCV- or HBV-related cirrhosis treated by liver transplantation (n=31).Results:The following characteristics were unequally distributed among the groups: age, Hb, AST, ALP, LDH, T. bil, albumin, total cholesterol, HDL, serum total iron binding capacity, and transferrin saturation (TS). In the two-group comparison of Groups 1 and 2, significant differences in Hb, AST, AP, albumin, and prohepcidin were observed; the latter was more elevated in HCV patients (Group 2) (p
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- 2023
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3. The Prognostic Significance of Circulating Tumor Cells in Patients with Pancreatobiliary Cancer
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İlkay Tuğba Ünek, İlhan Öztop, Yasemin Başbınar, Tarkan Ünek, Asım Leblebici, Caner Karaca, Ece Çakıroğlu, Tuğba Uysal, Anıl Aysal, Hülya Ellidokuz, Özgül Sağol, and İbrahim Astarcıoğlu
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Published
- 2023
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4. lncRNA XIST Interacts with Regulatory T Cells within the Tumor Microenvironment in Chronic Hepatitis B-Associated Hepatocellular Carcinoma
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Burcin PEHLIVANOGLU, Anil AYSAL, Cihan AGALAR, Tufan EGELI, Mucahit OZBILGIN, Tarkan UNEK, Ilkay Tugba UNEK, Ilhan OZTOP, Safiye AKTAS, and Ozgul SAGOL
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hepatocellular carcinoma ,lncrna ,inflammation ,chronic hepatitis b ,xist ,cd25 ,regulatory ,Pathology ,RB1-214 - Abstract
Objective: Alterations in the expression of several long non-coding RNAs (lncRNAs) have been shown in chronic hepatitis B-associated hepatocellular carcinoma (CHB-HCC). Here, we aimed to investigate the association between the expression of inflammation-associated lncRNA X-inactive specific transcript (XIST) and the type of inflammatory cells within the tumor microenvironment. Material and Methods: Twenty-one consecutive cirrhotic patients with CHB-HCC were included. XIST expression levels were investigated on formalin-fixed paraffin-embedded (FFPE) tumoral and peritumoral tissue samples by real-time polymerase chain reaction (RT-PCR). Immunohistochemical staining for CD3, CD4, CD8, CD25, CD163, CTLA4, and PD-1 were performed. The findings were statistically analyzed. Results: Of the 21 cases, 11 (52.4%) had tumoral and 10 (47.6%) had peritumoral XIST expression. No significant association was found between the degree of inflammation and XIST expression. The number of intratumoral CD3, CD4, CD8 and CD20 positive cells was higher in XIST-expressing tumors, albeit without statistical significance. Tumoral and peritumoral XIST expression tended to be more common in patients with tumoral and peritumoral CD4high inflammation. The number of intratumoral CD25 positive cells was significantly higher in XIST-expressing tumors (p=0.01). Tumoral XIST expression was significantly more common in intratumoral CD25high cases (p=0.04). Peritumoral XIST expression was also more common among patients with CD25high peritumoral inflammation, albeit without statistical significance (p=0.19). Conclusion: lncRNA XIST is expressed in CHB-HCC and its expression is significantly associated with the inflammatory tumor microenvironment, particularly with the presence and number of CD25 (+) regulatory T cells. In vitro studies are needed to explore the detailed mechanism.
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- 2024
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5. Type of calcineurin inhibitor and long-term outcomes following liver transplantation in patients with primary biliary cholangitis – an ELTR study
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Maria C. van Hooff, Rozanne C. de Veer, Vincent Karam, Rene Adam, Pavel Taimr, Wojciech G. Polak, Hasina Pashtoun, Sarwa Darwish Murad, Christophe Corpechot, Darius Mirza, Michael Heneghan, Peter Lodge, Gabriel C. Oniscu, Douglas Thorburn, Michael Allison, Herold J. Metselaar, Caroline M. den Hoed, Adriaan J. van der Meer, Gabriel Oniscu, Johann Pratschke, Derek Manas, William Bennet, Pal-Dag Line, Emir Hot, Krzysztof Zieniewicz, Bo Goran Ericzon, Jiri Fronek, Jurgen L. Klempnauer, Allan Rasmussen, Renato Romagnoli, Petr Nemec, Arno Nordin, Andreas Paul, Paolo De Simone, R.J. Porte, Gabriela Berlakovich, Daniel Cherqui, Jacques Pirenne, Etienne Sokal, Giorgio Rossi, Daniel Candinas, Philippe Bachellier, Oleg Rummo, Karim Boudjema, Anna Mrzljak, Olivier Soubrane, Herold Metselaar, Stefan Schneeberger, Francis Navarro, Thierry Berney, Christophe Duvoux, Michele Colledan, Luciano De Carlis, Olivier Boillot, Jean Hardwigsen, Francois Rene Pruvot, Bertrand Suc, Marco Vivarelli, Pierre Alain Clavien, Hauke Lang, Maciej Kosieradzki, Frederik Berrevoet, Bruno Heyd, Matteo Cescon, Laurence Chiche, Eberhard Kochs, Umberto Baccarani, Olivier Detry, Michael Bartels, Massimo Rossi, Olivier Scatton, Vasileios Papanikolaou, Ian Alwayn, Peter Schemmer, N. Senninger, Christian Ducerf, Fabrizio Di Benedetto, Giuseppe Tisone, Silvio Nadalin, Zoltan Mathe, Marija Ribnikar, Utz Settmacher, Thomas Becker, Nuno Silva, Jorge Daniel, Irinel Popescu, Valerio Lucidi, Wolf O. Bechstein, Thomas Decaens, Jean Gugenheim, Salvatore Gruttadauria, Frausto Zamboni, Murat Zeytunlu, Jorg C. Kalff, Toomas Vali, Yaman Tokat, Ernst Klar, Julius Janek, Murat Kilic, Krum Katzarov, Lutz Fisher, Emmanuel Buc, Marco Castagneto, Tarkan Unek, Lubomir Spassov, Dirk Stippel, Christiane Bruns, Hans Schlitt, Ephrem Salame, Piotr Kalicinski, and Koray Acarli
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Calcineurin inhibitors ,Graft survival ,Liver Transplantation ,Primary Biliary Cholangitis ,Survival ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Background & Aims: Tacrolimus has been associated with recurrence of primary biliary cholangitis (PBC) after liver transplantation (LT), which in turn may reduce survival. This study aimed to assess the association between the type of calcineurin inhibitor used and long-term outcomes following LT in patients with PBC. Methods: Survival analyses were used to assess the association between immunosuppressive drugs and graft or patient survival among adult patients with PBC in the European Liver Transplant Registry. Patients who received a donation after brain death graft between 1990 and 2021 with at least 1 year of event-free follow-up were included. Results: In total, 3,175 patients with PBC were followed for a median duration of 11.4 years (IQR 5.9–17.9) after LT. Tacrolimus (Tac) was registered in 2,056 (64.8%) and cyclosporin in 819 (25.8%) patients. Following adjustment for recipient age, recipient sex, donor age, and year of LT, Tac was not associated with higher risk of graft loss (adjusted hazard ratio [aHR] 1.07, 95% CI 0.92-1.25, p = 0.402) or death (aHR 1.06, 95% CI 0.90-1.24, p = 0.473) over cyclosporin. In this model, maintenance mycophenolate mofetil (MMF) was associated with a lower risk of graft loss (aHR 0.72, 95% CI 0.60-0.87, p
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- 2024
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6. The Site of Lymph Node Metastasis: A Significant Prognostic Factor in Pancreatic Ductal Adenocarcinoma
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Anil AYSAL, Cihan AGALAR, Sumru CAGAPTAY, Turugsan SAFAK, Tufan EGELI, Mucahit OZBILGIN, Tugba UNEK, Tarkan UNEK, and Ozgul SAGOL
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pancreatic ductal adenocarcinoma ,regional lymph node site ,metastasis ,Pathology ,RB1-214 - Abstract
Objective: While the presence and number of metastatic lymph nodes (LNs) are important prognostic factors for pancreatic ductal adenocarcinoma (PDAC), there is no recommendation to specify metastatic regional LN localization in the current staging system. The aim of this study was to evaluate the prognostic effect of regional metastatic LN localizations in PDAC. Material and Method:Metastatic sites of 101 consecutive PDAC patients who underwent pancreaticoduodenectomy were classified as peripancreatic, perigastric, hepatica communis, hepatoduodenal, and superior mesenteric artery. The frequency of metastasis in each region and the association between the presence of metastasis in each site and overall and disease-free survival were statistically analyzed. Results: Eighty cases (79.2%) had peripancreatic, 7 (6.9%) had perigastric, 6 (5.9%) had hepatica communis, 7 (6.9%) had hepatoduodenal, and 4 (4%) had superior mesenteric artery LN metastasis. The overall and disease-free survival values were significantly shorter in patients with hepatoduodenal LN metastasis (log rank; p= 0.001, p=0.017, respectively). The presence of metastatic superior mesenteric artery LN was significantly associated with shorter disease-free survival in univariate analysis (p=0.017). Hepatoduodenal LN metastasis was an independent predictor of mortality (p=0.005) in multivariate analysis. Conclusion: The presence of hepatoduodenal LN metastasis is an independent poor prognostic factor for mortality. The presence of metastatic LN in the superior mesenteric artery region was significantly associated with shorter disease-free survival time, although not an independent predictor. We conclude that the metastatic regional LN sites, especially the hepatoduodenal region, have an impact on the prognosis, and should be included in synoptic pathology reports.
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- 2022
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7. En Bloc Pancreaticoduodenectomy for Locally Advanced Right Colon Cancers
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Cihan Ağalar, Aras Emre Canda, Tarkan Unek, and Selman Sokmen
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Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Locally advanced right colon cancer may invade adjacent tissue and organs. Direct invasion of the duodenum and pancreas necessitates an en bloc resection. Previously, this challenging procedure was associated with high morbidity and mortality; however, today, this procedure can be done more safely in experienced centers. The aim of this study is to report our experience on en bloc right colectomy with pancreaticoduodenectomy for locally advanced right colon cancers. Between 2000 and 2012, 5 patients underwent en bloc multivisceral resection. No major morbidities or perioperative mortalities were observed. Median disease-free survival time was 24.5 months and median overall survival time was 42.1 (range: 4.5–70.4) months in our series. One patient lived 70 months after multivisceral resection and underwent cytoreductive surgery and total pelvic exenteration during the follow-up period. In locally advanced right colon tumors, all adhesions should be considered as malign invasion and separation should not be done. The reasonable option for this patient is to perform en bloc pancreaticoduodenectomy and right colectomy. This procedure may result in long-term survival with acceptable morbidity and mortality rates. Multidisciplinary teamwork and multimodality treatment alternatives may improve the results.
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- 2017
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8. A Novel Technique for Managing Pancreaticojejunal Anastomotic Leak after Pancreaticoduodenectomy
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Tufan Egeli, Tarkan Unek, Mucahit Ozbilgin, Mustafa Goztok, and Ibrahim Astarcıoglu
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Surgery ,RD1-811 - Abstract
Pancreaticoduodenectomy (Whipple’s procedure) remains the only definitive treatment option for tumors of the periampullary region. The most common and life-threatening complications following the procedure are pancreatic anastomotic leakage and subsequent fistula formation. When these complications occur, treatment strategy depends on the severity of anastomotic leakage, with patients with severe leakages requiring reoperation. The optimal surgical method used for reoperation is selected from among different options such as wide drainage, definitive demolition of the pancreaticojejunal anastomosis and performing a new one, or completion pancreatectomy. Here we present a novel, simple technique to manage severe pancreatic leakage via ligamentum teres hepatis patch.
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- 2016
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9. Fusarium solani species complex infection treated with posaconazole in a liver transplantation patient; a case report
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Vildan Avkan Oguz, Nilgun Karabicak, Caglar Irmak, and Tarkan Unek
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Infectious Diseases - Abstract
Although Fusarium spp. rarely cause infections in healthy people, they can cause fusariosis, particularly in neutropenic hematological malignancies, bone marrow transplant patients, and immunocompromised patients, such as those with acquired immune deficiency syndrome (AIDS), and rarely in solid organ transplant recipients. Here, we present a case of a liver transplant recipient with F. solani species complex (FSSC) infection treated with posaconazole. A 61-year-old man presented with multiple itchy, painful, palpable, irregular, subcutaneous nodules on the right leg and total dystrophic onychomycosis in the right toenails. Incisional skin biopsies of the lesions were performed, and the samples were sent to the pathology and mycology laboratories for analysis. The clinical isolate was identified as FSSC using phenotypic, matrix-assisted laser desorption/ionization-time of flight mass spectrometry, and genotypic methods. Liposomal amphotericin B could not be administered owing to the development of side effects; hence, the patient was treated with posaconazole for 4 months. While some nodular lesions disappeared completely under this treatment, the others showed dimensional regression. This is the first case of FSSC infection with skin and nail involvement in a non-neutropenic, liver transplant patient in Turkey. Fusariosis may develop with rare species, such as FSSC, as first reported in this case of a liver transplant patient. Regardless of the species, amphotericin B is the first choice for treating fusariosis; however, posaconazole is an effective and safe alternative to amphotericin B.
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- 2023
10. COVID-19 in Liver Transplant Patients: A University Hospital Experience
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Oya Ozlem Eren-Kutsoylu, Tufan Egeli, Cihan Agalar, Mucahit Ozbilgin, Aylin Ozgen-Alpaydin, Tarkan Unek, and Vildan Avkan-Oguz
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Transplantation ,Surgery - Published
- 2023
11. Tumoral and Parenchymal Morphological Assessment in Liver Metastases of Colorectal Carcinoma: Micrometastasis, Peritumoral Lymphocytes, Tumor Budding and Differentiation are Potential Prognostic Factors
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Anil Aysal, Cihan Agalar, Tufan Egeli, Mucahit Ozbilgin, Tarkan Unek, Isil Somali, Ilhan Oztop, Funda Obuz, Ibrahim Astarcioglu, and Ozgul Sagol
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Inflammation ,Liver Neoplasms ,Carcinoma ,Prognosis ,Pathology and Forensic Medicine ,Fatty Liver ,Necrosis ,Neoplasm Micrometastasis ,Humans ,Neoplasm Invasiveness ,Surgery ,Lymphocytes ,Anatomy ,Colorectal Neoplasms ,Retrospective Studies - Abstract
Introduction: Various potential prognostic histopathologic factors for colorectal carcinoma liver metastasis have been proposed. However, there is still no consensus on pathological reporting of colorectal carcinoma liver metastasis resection materials. The aim of this study was to investigate the relation between selected tumoral and parenchymal histopathologic features and prognostic factors for better characterization and prognostic prediction of the patients with colorectal carcinoma liver metastasis. Methods: Hematoxylin-eosin stained slides from 100 patients who underwent hepatic resection were evaluated. Pathologic characteristics; including number of tumor nodules, largest tumor size, status of surgical margin, tumor distance to closest margin, tumor necrosis, the presence of tumor capsule, tumor differentiation, perineural and lymphovascular invasion, micrometastasis, tumor budding, peritumoral lymphocytic infiltrate and parenchymal features including steatosis, steatohepatitis, lobular inflammation, confluent necrosis, hepatocyte ballooning, portal inflammation were assessed. For 49 patients who were treated with preoperative chemotherapy, tumor regression grade and chemotherapy-related parenchymal changes such as sinusoidal damage, venous obstruction, nodular regenerative hyperplasia, steatosis and steatohepatitis were also evaluated. Results: The presence of lymphovascular invasion (p < 0.001), micrometastasis (p=0.004), absent or mild peritumoral lymphocytic infiltration (p =0.013), high tumor budding score (p=0.033) and moderate/poor differentiation (p=0.022) were significantly associated with shorter overall survival. Lymphovascular invasion (p < 0.001) was an independent predictor of mortality in multivariate analysis. Conclusions: We conclude that tumor differentiation, lymphovascular invasion, micrometastasis, peritumoral lymphocytic reaction and tumor budding score are potential prognostic histopathological features and candidates for inclusion in pathology reports of colorectal carcinoma liver metastasis resections.
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- 2022
12. Peritumoral histopathologic findings in patients with chronic viral hepatitis-associated hepatocellular carcinoma
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Burcin Pehlivanoglu, Anil Aysal, Cihan Agalar, Tufan Egeli, Mucahit Ozbilgin, Tarkan Unek, Tugba Unek, Ilhan Oztop, and Ozgul Sagol
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Microbiology (medical) ,Inflammation ,Liver Cirrhosis ,Male ,Carcinoma, Hepatocellular ,Hepatitis, Viral, Human ,Liver Neoplasms ,General Medicine ,Prognosis ,Pathology and Forensic Medicine ,Immunology and Allergy ,Humans ,Female ,Neoplasm Recurrence, Local ,Retrospective Studies - Abstract
Data on peritumoral histopathologic findings in patients with hepatocellular carcinoma (HCC) is limited. In this retrospective study, we evaluated the peritumoral histopathologic changes in patients with chronic viral hepatitis (CVH)-associated HCC (CVH-HCC) and their prognostic value. 61 consecutive cirrhotic patients who underwent liver transplantation due to CVH-HCC were included. Histopathologic features within 1 cm distance of the tumor, and their association with clinicopathological characteristics and prognosis were evaluated. A random representative slide of cirrhotic parenchyma unrelated to invasive and/or dysplastic foci was also evaluated for the same histopathologic criteria. The majority (85%, n = 52) were male with a median age of 55 +/- 6.38 (range, 39-67). The etiologic agent was only HBV in 90% (n = 55). The most common peritumoral findings were portal inflammation (100%; n = 61), ductular reaction (100%; n = 61) and sinusoidal dilatation (95%; n = 58). Macrovascular invasion was observed only in four cases (7%) with mild peritumoral portal inflammation. Neutrophilic infiltration of the peritumoral portal tracts (n = 18; 30%) was significantly associated with pT4 tumor stage, tumor grade, macrovascular invasion, and pretransplant therapy. Patients with moderate or severe peritumoral sinusoidal dilatation tended to have worse prognosis, albeit not significantly. Peritumoral ballooning degeneration was associated with multifocality, recurrence and recurrence-free survival in both uni- and multivariate analysis. Peritumoral histopathologic changes in CVH-HCC can be classified as: changes related to pathogenesis, changes indirectly affecting prognosis, and changes directly affecting prognosis. Peritumoral prominent ballooning degeneration may be a predictor of recurrence while portal neutrophilic infiltration and sinusoidal dilatation seem to indicate poor prognosis.
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- 2022
13. Are The Automatic Retractors Indispensable for Optimal Exposure in Upper Gastrointestinal Surgeries?
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Tufan EGELİ, Cihan AGALAR, and Tarkan UNEK
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- 2022
14. De Novo Malignancies After Liver Transplantation: A Single Institution Experience
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Ibrahim Astarcioglu, Serhan Derici, Ilkay Tugba Unek, Tarkan Unek, Cihan Agalar, A. Bacakoglu, Murat Aysin, Mucahit Ozbilgin, Mesut Akarsu, and Tufan Egeli
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Male ,medicine.medical_specialty ,Time Factors ,Cirrhosis ,Turkey ,medicine.medical_treatment ,Population ,030230 surgery ,Liver transplantation ,Gastroenterology ,03 medical and health sciences ,0302 clinical medicine ,Risk Factors ,Neoplasms ,Internal medicine ,medicine ,Humans ,education ,Lung cancer ,Aged ,Retrospective Studies ,Transplantation ,education.field_of_study ,business.industry ,Incidence ,Cancer ,Immunosuppression ,Retrospective cohort study ,Middle Aged ,medicine.disease ,Liver Transplantation ,Radiation therapy ,Treatment Outcome ,Female ,business ,Immunosuppressive Agents - Abstract
OBJECTIVES Our objective was to analyze characteristics, risk factors, and incidence of de novo malignancies after liver transplant. MATERIALS AND METHODS The hospital records of 557 patients who underwent liver transplant were analyzed from the point of de novo malignancy development. We evaluated the demographic features and survival of these patients retrospectively. RESULTS The research covered 429 patients, 9 (2%) of whom developed de novo malignancy. All of these patients were male (100%), and their mean (SD) age was 51.33 (4.69) years (range, 45-65 y). Indications for transplant included alcohol related in 4 cases, chronic hepatitis B in 2 cases, chronic hepatitis B and C in 1 case, chronic hepatitis B and D in 1 case, and chronic hepatitis C and alcohol-related cirrhosis in 1 case. The mean (SD) time from transplant to cancer diagnosis was 63.41 (37.10) months (range, 17-122 mo). The types of tumors were lung cancer, lymphoma, neuroendocrine tumor of lung, nasopharyngeal cancer, and squamous cell carcinoma of the skin. Seven cases received chemotherapy with or without radiotherapy. Two cases received surgery and radiotherapy. One patient underwent surgical treatment. One patient died before treatment was started. CONCLUSIONS In recent years, improvements in surgical techniques and immunosuppressive therapies have helped prolong survival of patients who undergo liver transplant. However, this also has led to a rise in the incidence of long-term complications such as de novo malignancy. These patients are more likely to develop de novo malignancy than the general population, for which chronic immunosuppression is identified as a major risk factor. Early diagnosis and treatment of de novo malignancies can help obtain better prognosis and higher survival rates in these patients.
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- 2019
15. Response to Laparoscopic Splenectomy in Patients with Immune Thrombocytopenic Purpura (İTP): Evaluation of Single Center Data
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Koray Atila, Mucahit Ozbilgin, Tufan Egeli, Özden Pişkin, Ali Durubey Çevlik, Aybüke Olgun, Serhan Derici, Cihan Ağalar, Sermin Özkal, and Tarkan Unek
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- 2019
16. The results of expanded-polytetrafluoroethylene mesh repair in difficult abdominal wall defects
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Tufan Egeli, Selman Sökmen, Vildan Avkan Oğuz, Funda Obuz, Tarkan Unek, and Hülya Ellidokuz
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Adult ,Male ,medicine.medical_specialty ,Time Factors ,Incisional hernia ,lcsh:Surgery ,Expanded polytetrafluoroethylene ,030230 surgery ,Abdominal wall ,03 medical and health sciences ,Postoperative Complications ,0302 clinical medicine ,Recurrence ,Risk Factors ,medicine ,Humans ,Incisional Hernia ,Hernia ,Polytetrafluoroethylene ,Aged ,Mesh repair ,business.industry ,Abdominal Wall ,lcsh:RD1-811 ,Middle Aged ,Surgical Mesh ,medicine.disease ,Hernia, Ventral ,Surgery ,Seroma ,Treatment Outcome ,surgical procedures, operative ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Ventral hernia ,Female ,business ,Surgical site infection ,Follow-Up Studies - Abstract
Summary: Background: The repair of difficult abdominal wall defects (AWDs) continues to be a crucial and demanding issue for surgeons. This study aimed to present the risk factors and the long-term results of usage of an expanded-polytetrafluoroethylene (e-PTFE) synthetic mesh for the AWR of difficult abdominal wall defects. Methods: This study included 156 adult patients who underwent difficult AWR with e-PTFE mesh for incisional hernia, ventral hernia, and created AWDs of various etiopathologies. The association between the risk factors and the postoperative complications of AWR was analyzed, and overall long-term outcomes of e-PTFE repair were assessed. Results: The median follow-up duration was 119.1 (ranging from 2 to 206) months. In 70 (44.8%) patients, there were major co-morbidities. A surgical site infection developed in 17 (10.9%) patients. Of these, only 2 (1.3%) patients had e-PTFE mesh infection. Seven (4.4%) patients experienced recurrence. Recalcitrant seroma formation occurred in 8 (36.3%) patients. Conclusion: E-PTFE synthetic mesh usage for difficult abdominal wall hernias can help the hernia surgeon obtain safe and durable long-term results of sound repair. Keywords: Expanded-polytetrafluoroethylene mesh, Abdominal wall defects, Incisional hernia
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- 2019
17. Manual and semi-automated computed tomography volumetry significantly overestimates the right liver lobe graft weight: a single-center study with adult living liver donors
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Hakkı Çelik, Hüseyin Odaman, Canan Altay, Tarkan Ünek, Mücahit Özbilgin, Tufan Egeli, Cihan Ağalar, İbrahim Kemal Astarcıoğlu, and Funda Barlık
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liver ,living donor liver transplantation ,manual ct volumetry ,semi-automated ct volumetry ,transplantation ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
PURPOSE: Preoperative evaluation of donor liver volume is indispensable in living donor liver transplantation to ensure sufficient residual liver and graft-to-recipient weight ratio. This study aims to evaluate the accuracy of two computed tomography (CT) volumetry programs, an interactive manual and a semi-automated one, in the preoperative estimation of the right lobe graft weight. METHODS: One hundred and nine right liver lobe living donors between January 2008 and January 2020 were enrolled in this retrospective study. Two radiologists measured the liver graft volumes independently using manual and semi-automated CT volumetry, and the interaction time was recorded. Actual graft weight (AGW) measured intraoperatively served as the reference standard. The paired samples t-test was used to compare the estimated graft weight (EGW) and the AGW. Inter-user and inter-method agreements were assessed with Bland–Altman plots. RESULTS: Both manual and semi-automated CT volumetry significantly overestimated the graft weight (EGW manual: 893 ± 155 mL vs. AGW manual: 787 ± 128 g, P < 0.001, EGW semi-automated: 879 ± 143 mL vs. AGW semi-automated, P < 0.001). The junior radiologist measured higher volumes than the senior radiologist with either method (P < 0.001). The Bland–Altman analysis revealed mean difference and standard deviation for inter-method agreement of 7 ± 48 cc for the senior radiologist, and 34 ± 54 cc for the junior radiologist. The mean difference and standard deviation for inter-method agreement was 63 ± 59 cc in manual volumetry and 22 ± 38 cc in semi-automated volumetry. The mean interaction time was 27.3 ± 14.2 min for manual volumetry and 6.8 ± 1.4 min for semi-automated volumetry (P < 0.001). CONCLUSION: Both manual and semi-automated CT volumetry significantly overestimated the right liver graft weight, while semi-automated volumetry significantly reduced the interaction time.
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- 2024
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18. Comparison of Resection and Liver Transplant in Treatment of Hepatocellular Carcinoma
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Ozgul Sagol, Haluk Sirin, Tarkan Unek, Ali İbrahim Sevinç, Süleyman Özkan Aksoy, Ibrahim Astarcioglu, Zekai Serhan Derici, Cihan Agalar, Hülya Ellidokuz, and Baha Arslan
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Male ,medicine.medical_specialty ,Carcinoma, Hepatocellular ,Time Factors ,Cirrhosis ,Clinical Decision-Making ,Milan criteria ,Single Center ,Risk Assessment ,Gastroenterology ,Disease-Free Survival ,Postoperative Complications ,Risk Factors ,Internal medicine ,medicine ,Carcinoma ,Hepatectomy ,Humans ,Progression-free survival ,Stage (cooking) ,Neoplasm Staging ,Retrospective Studies ,Transplantation ,business.industry ,Mortality rate ,Liver Neoplasms ,Length of Stay ,Middle Aged ,medicine.disease ,Progression-Free Survival ,Liver Transplantation ,Hepatocellular carcinoma ,Female ,Neoplasm Recurrence, Local ,business - Abstract
Objectives Hepatic resection and liver transplant are regarded as 2 potentially curative treatments for hepatocellular carcinoma. Here, we compared both options in patients with hepatocellular carcinoma secondary to cirrhosis seen at a single center over 12 years. Materials and methods We evaluated early complications and survival of patients with hepatocellular carcinoma treated with liver transplant (57 patients) or hepatic resection (36 patients) at our center between 1998 and 2010. Results The 34-month mean follow-up period was similar for both treatment groups. The liver transplant group had a longer hospital stay than the hepatic resection group (P ⟨ .001). Patients with Child-Turcotte-Pugh A stage were treated by hepatic resection more than by liver transplant (P ⟨ .001),with Child-Turcotte-Pugh B stage patients treated by liver transplant more than by hepatic resection (P = .03). All patients with Child-Turcotte-Pugh C stage had liver transplant. Both treatment groups had similar postoperative complications and early postoperative mortality rates, but liver transplant resulted in longer overall (P = .001) and higher event-free (P = .001) survival than hepatic resection. Among the liver transplant group, 57.8% of patients met the Milan criteria. Patients who met Milan criteria were treated by liver transplant statistically more than hepatic resection, and these patients had longer overall survival (P = .01) and higher event-free survival (P ⟨ .001) than patients who had hepatic resection. Hepatocellular carcinoma recurrence rates were higher after hepatic resection (P = .232). Conclusions In patients with hepatocellular carcinoma, hospital stay was longer after liver transplant, but morbidity and mortality rates for liver transplant versus hepatic resection were similar. However, overall and event-free survival rates were better after liver transplant than after hepatic resection. These results suggest that liver transplant should be considered as the primary treatment option for patients with hepatocellular carcinoma secondary to cirrhosis.
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- 2020
19. Analysis of Causes and Risk Factors for Late Mortality After Liver Transplant: How Can We Obtain Better Long-Term Survival?
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Cihan Agalar, Hülya Ellidokuz, Mesut Akarasu, Tarkan Unek, Ibrahim Astarcioglu, Mucahit Ozbilgin, Tufan Egeli, Serhan Derici, and A. Bacakoglu
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Adult ,Male ,medicine.medical_specialty ,Multivariate analysis ,Time Factors ,Adolescent ,Chronic liver disease ,Malignancy ,Gastroenterology ,Risk Assessment ,Coronary artery disease ,Young Adult ,Postoperative Complications ,Risk Factors ,Internal medicine ,Cause of Death ,medicine ,Humans ,Aged ,Retrospective Studies ,Transplantation ,Univariate analysis ,business.industry ,Age Factors ,Hepatitis C ,Hepatitis B ,Middle Aged ,medicine.disease ,Liver Transplantation ,Treatment Outcome ,Hepatocellular carcinoma ,Female ,business - Abstract
Objectives We investigated late mortality causes and risk factors in patients who were undergoing deceased-donor liver transplant. Materials and methods Patients who had deceased-donor liver transplant from February 1997 to June 2014 in the hepatopancreaticobiliary surgery and liver transplant unit at Dokuz Eylul University Hospital were analyzed. Inclusion criteria were patients over 18 years of age and who survived more than 1 year after liver transplant. Causes of mortality and related risk factors after the first year were analyzed. Results Of the 157 included patients, 102 patients (72%) received transplant procedures for hepatitis B and C secondary to chronic liver disease. Mean follow-up was 89.85 months (range, 14.4-240 months). Of 157 patients, 20 patients (12.7%) died: 12 patients (60%) died during posttransplant years 2-5 and 8 patients (40%) died after 5 years. Causes of death included malignancy in 8 patients (40%), recurrent hepatitis C infection in 3 patients (15%), infection in 3 patients (15%), coronary artery disease in 2 patients (10%), graft rejection in 2 patients (10%), and biliary complications in 2 patients (10%). Univariate analyses showed that long-term survival was significantly lower in patients older than 50 years (P = .001), when there was presence of hepatocellular carcinoma (P = .011), and when donor age was higher than 38 years (P = .045). Multivariate analyses identified recipient age (P = .007) and presence of hepatocellular carcinoma (P = 0.033) as factors that reduced long-term survival. Conclusions The main causes of late mortality in liver transplant are malignancy, recurrence of hepatitis C, infection, coronary artery disease, graft rejection, and biliary complications. Advanced age and hepatocellular carcinoma are independent risk factors that increase late mortality.
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- 2020
20. Pediatric liver transplant patients’ transition to adulthood: Patient and parent experiences
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Özgül Karayurt, Tarkan Unek, Ibrahim Astarcioglu, and Yaprak Sarigöl Ordin
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medicine.medical_specialty ,Coping (psychology) ,business.industry ,medicine.medical_treatment ,media_common.quotation_subject ,General Medicine ,030230 surgery ,Liver transplantation ,Transplantation ,03 medical and health sciences ,0302 clinical medicine ,Content analysis ,Family medicine ,medicine ,030211 gastroenterology & hepatology ,Transplant patient ,Young adult ,business ,General Nursing ,Autonomy ,Qualitative research ,media_common - Abstract
This qualitative research study describes the experiences of child and adolescent liver transplant recipients and their parents during the patients' transition to adulthood. Data were collected from pediatric liver transplant recipients and their parents during individual interviews, and these were later analyzed using conventional content analysis. Seven main themes emerged: coping, self-management, body image, social relationships, academic life, work life, and live donors. Study results revealed that the patients who received liver transplants during their childhood and adolescence used both effective and ineffective strategies to cope with the difficulties they faced during the transition period into adulthood. The parents experienced many problems: on learning of their child's need for a transplant, parents were advised that they should consider becoming a live donor. This very difficult decision was a source of great stress and required serious consideration. After transplantation the parents wanted their children to have autonomy but could not encourage them because of concerns for their health.
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- 2017
21. The Most Frequently Cited 100 Articles in Liver Transplantation Literature
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Ibrahim Astarcioglu, Volkan Hanci, Hülya Ellidokuz, Şule Özbilgin, Mucahit Ozbilgin, Cihan Agalar, Tufan Egeli, and Tarkan Unek
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medicine.medical_specialty ,Bibliometric analysis ,medicine.medical_treatment ,MEDLINE ,Library science ,Bibliometrics ,Liver transplantation ,03 medical and health sciences ,0302 clinical medicine ,Risk index ,Humans ,Medicine ,030212 general & internal medicine ,Retrospective Studies ,Publishing ,Transplantation ,business.industry ,General surgery ,030208 emergency & critical care medicine ,Authorship ,Tissue Donors ,Liver Transplantation ,Liver graft ,Surgery ,Periodicals as Topic ,business ,Citation - Abstract
Introduction We investigated the liver transplantation literature since 1975 and found the most frequently cited 100 articles and assessed the distribution of authors and journals of these articles. Method Using the advanced mode of the Institute for Scientific Information (ISI) Web of Science (WOS) search engine, the words “SU = transplantation AND TI = liver OR SU = transplantation AND TS = liver” were used to scan articles and determine the most-cited 100 articles on July 18, 2016. Results From 1975 to date, it appears a total of 43,369 articles were published in the field of liver transplantation in the WOS. Although the most cited article had 677 citations, the least cited article had 180 citations. The mean citation number for the 100 articles was 252.31 ± 96.75. The mean annual citation number for the articles varied from 61.55 to 5 and the mean was 15.31 ± 8.63. The most cited article was by Feng et al “Characteristics Associated With Liver Graft Failure: The Concept of a Donor Risk Index” published in the American Journal of Transplantation (677 citations). Conclusion Bibliometric analysis highlights the key topics and publications that have shaped the understanding and management of liver transplantation. According to our research, this is the first study to investigate articles with most citations in the field of liver transplantation. In our study the article with the most citations was cited 677 times, whereas the 100th article was cited 180 times with a mean citation number for the 100 articles of 252.31 ± 96.75.
- Published
- 2017
22. Complications in Donors Using Right Liver Graft: Analysis of 280 Consecutive Cases
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E. Karadeniz, Funda Obuz, Ibrahim Astarcioglu, Mucahit Ozbilgin, Tufan Egeli, Hülya Ellidokuz, Cihan Agalar, Tarkan Unek, and Sevda Özkardeşler
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,medicine.medical_treatment ,Transplants ,Economic shortage ,030230 surgery ,Transplant Donor Site ,Living donor ,Donor Selection ,Young Adult ,03 medical and health sciences ,Postoperative Complications ,0302 clinical medicine ,Living Donors ,medicine ,Hepatectomy ,Humans ,Retrospective Studies ,Transplantation ,business.industry ,Middle Aged ,medicine.disease ,Kidney Transplantation ,Liver Transplantation ,Surgery ,Pulmonary embolism ,Female ,030211 gastroenterology & hepatology ,Patient Safety ,Right liver ,Living donor liver transplantation ,business ,Body mass index - Abstract
Introduction Living donor liver transplantation (LDLT) is performed with increasing frequency worldwide due to the shortage of donated organs. It is a life-saving procedure for the recipient, but, on the other hand, a major surgical procedure for healthy donors and it may cause morbidity and even mortality. Patients and Methods This research was completed at Dokuz Eylul University Faculty of Medicine Hospital General Surgery Department Liver Transplant Unit and included 280 cases (4 with simultaneous liver and kidney transplants from living donors) who underwent donor right hepatectomy for LDLT from June 2000 to June 2016. We analyzed the data of patients retrospectively. Results Of 280 donor right hepatectomies for LDLT, 181 were male (M; 64.6%) and 99 were female (F; 35.4%) (M/F: 1.82). Mean donor age was 31.2 ± 0.9 years (range, 18–56). Mean donor monitoring duration was 45 ± 2.4 months (range, 3–192 months). Mean body mass index (BMI) was 24.28 ± 2.96 kg/m2 (range, 18.1–32.42 kg/m2). In our study 72 cases (25.7%) developed postoperative complications. There were 17 Clavien grade 3A, 1 grade 3B, and 5 grade 4A complications and also 1 death due to pulmonary embolism. Conclusion Together with the increase in living donor surgery, the morbidity and mortality of these cases are becoming controversial. Full donor safety is only possible with appropriate donor choice requiring very detailed studies, a problem-free hepatectomy process, and close postoperative donor monitoring.
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- 2017
23. Evaluation of Pregnancy Outcomes After Liver Transplantation
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Tarkan Unek, A. Avcu, Ibrahim Astarcioglu, Mucahit Ozbilgin, Mesut Akarsu, and Tufan Egeli
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Adult ,medicine.medical_specialty ,Turkey ,medicine.medical_treatment ,Birth weight ,030230 surgery ,Liver transplantation ,03 medical and health sciences ,0302 clinical medicine ,Pregnancy ,medicine ,Birth Weight ,Humans ,In patient ,Pregnancy outcomes ,Retrospective Studies ,Transplantation ,business.industry ,Obstetrics ,Infant, Newborn ,medicine.disease ,Liver Transplantation ,Pregnancy Complications ,Gestational diabetes ,Premature birth ,Hypertension ,Premature Birth ,Female ,030211 gastroenterology & hepatology ,Surgery ,business ,Live Birth - Abstract
Liver transplantation is increasing worldwide. Pregnancy after liver transplantation is considered to be well tolerated with favorable neonatal outcomes in cases of stable and sufficient graft function. In this study, our aim was to determine pregnancy and neonatal outcomes of patients after liver transplantation. Data for patients who had been followed up by the liver transplantation clinic at the Dokuz Eytill University Medical Faculty Hospital, Turkey, between 2002 and 2016, and who had pregnancy after the transplantation were evaluated retrospectively. The earliest post-transplantation conception occurred after 22 months and the latest conception occurred after 108 months (mean, 55.4 months). Twenty-one pregnancies concluded with live births (100%). The mean birth week was 37.09. The earliest birth occurred at 27 weeks and the latest at 40 weeks. Mean birth weight was 2993 g (10th to 25th percentiles). No pregnancy-induced hypertension, pre-eclampsia, or gestational diabetes were observed in any patient. Five pregnancies concluded with premature birth. In conclusion, several complications may occur during pregnancy (such as hypertension or pre-eclampsia, etc) in patients with liver transplantation, but it seems that pregnancy has good effects on graft functions and the neonatal outcomes are favorable.
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- 2016
24. Vascular Complications After Liver Transplantation
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Ibrahim Astarcioglu, Tarkan Unek, Mucahit Ozbilgin, Tufan Egeli, Eren Kaya, Cihan Agalar, Aycan Gulcu, Sedat Karademir, and Engin Barıs Cesmeli
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Transplantation ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Incidence (epidemiology) ,Vascular complication ,030230 surgery ,Liver transplantation ,Anastomosis ,Diagnostic tools ,Surgery ,03 medical and health sciences ,Hepatic artery thrombosis ,0302 clinical medicine ,medicine.anatomical_structure ,Medicine ,business ,Vein ,Artery - Abstract
Objectives Vascular complications after liver trans-plant can be lethal. High levels of suspicion and aggressive use of diagnostic tools may help with early diagnosis and treatment. Here, we share our experiences regarding this topic. Materials and methods Adult and pediatric patients who had liver transplant between February 1997 and June 2018 in our clinic were included in the study. Patients were grouped according to age (pediatric patients were those under 18 years old), male versus female, indication for transplant, type of liver transplant, type of vascular complication, treatment, and survival after treatment. We analyzed the statistical incidence of vascular complications according to age, male versus female, and type of liver transplant. Results Our analyses included 607 liver transplant procedures, including 7 retransplants, with 349 (57.4%) from living donors and 258 (42.6%) from deceased donors. Of total patients, 539 were adults (89.8%) and 61 were children (10.2%). Vascular complications occurred in 25 patients (4.1%), with hepatic artery complications seen in 13 patients (2.1%) (10 adults [1.8%] and 3 children [4.9%]), portal vein com-plications seen in 9 patients (1.5%) (6 adults [1.1%] and 3 children [4.9%]), and hepatic vein complications seen in 3 patients (0.5%) (2 adults [0.36%] and 1 child [1.6%]). Rate of vascular complications was statistically higher in pediatric patients (11.4% vs 3.3%; P = .007) and higher but not statistically in recipients of livers from living donors (5.2% vs 2.7%; P = .19). Twelve patients (48.8%) were treated with endovascular approach, and 11 (0.44%) required surgical treatment. Two patients underwent immediate retransplant due to hepatic artery thrombosis. Conclusions Because vascular complications are the most severe complications after liver transplant, there must be close follow-up of vascular anastomoses, particularly early postoperatively, with radiologic methods. In cases of vascular complications, emergent treatment, including endovascular interventions, surgery, and retransplant, must be performed.
- Published
- 2019
25. Liver transplantation in Wilson’s disease: Long-Term Experience of Single Center
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Cihan Agalar, Anıl Aysal, Ozgul Sagol, Ibrahim Astarcioglu, Mucahit Ozbilgin, Mesut Akarsu, Tufan Egeli, Tarkan Unek, and Ziya Ayhan
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medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,General Medicine ,Disease ,Long term results ,Perioperative ,Liver transplantation ,Single Center ,medicine.disease ,Living donor ,Surgery ,Wilson's disease ,medicine ,Living donor liver transplantation ,business - Abstract
Aim: Liver transplantation (LT) is the most effective treatment method for preventing progressive and lethal complications of Wilson’s disease (WD). Despite the deceased donor liver transplantation (DDLT) and living donor liver transplantation (LDLT) are performed in many centers for WD, a limited number of reports were published, about long-term results. The aim of this study is to share the long-term outcomes of single center.Material and Methods: Patients who underwent LT for the WD, between 1997 and 2017 were included. Patient’s survival data, death causes, neurological symptoms and follow-up data were analyzed retrospectively.Results: Eighteen patients (8DDLT, 10LDLT) with the median age of 17.11±9.88 (6-43) were included. Donor relationship was familial in all LDLT patients. Median follow-up time was 80.57±67.59 (0.23-240.9) months and the median survival time was 173.74±25.13 months. Two patients (11.1%) died in the perioperative period (0-90 days) and totally 3 patients (16.6%) died in the postoperative 0-12 month’s period. The survival rates of the patient’s at 1-, 5- and 10 years were 83.3%, 75% and 67.3%, respectively. After LT, neurological symptoms disappeared in 6 of 7 patients and no improvement was observed in one patient. During follow-up period, chronic rejection was seen in 5 patients, 3 patients were treated with medical procedure and 2 patients died due to chronic rejection.Conclusions: Our findings are consistent with the literature, long-term survival is achieved in patients with no mortality, in the postoperative 0-12 month period and after LT, neurological symptoms are disappeared in most of the patients; according to this data, LT is an effective treatment method for the WD and complications.Keywords: Wilson disease; liver transplantation; long term results; living donor.
- Published
- 2019
26. Determinants and characteristics of tuberculosis in liver transplant recipients
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İbrahim Kemal Astarcioğlu, Selver Seda Mersin, Madina Abdulleyeva, Mucahit Ozbilgin, Tufan Egeli, Aylin Ozgen Alpaydin, Vildan Avkan Oğuz, Tarkan Unek, and Oguz Kilinc
- Subjects
Tuberculosis,liver transplantation,immune suppression,latent tuberculosis infection ,medicine.medical_specialty ,Tuberculosis ,business.industry ,Tuberculin ,Mean age ,General Medicine ,Skin test ,bacterial infections and mycoses ,medicine.disease ,Transplantation ,Increased risk ,Health Care Sciences and Services ,Internal medicine ,medicine ,Sağlık Bilimleri ve Hizmetleri ,Risk factor ,business ,Solid organ transplantation - Abstract
Background/aim: Solid organ transplant (SOT) recipients have increased risk of tuberculosis (TB). We aimed to investigate the prevalence and features of TB in liver transplant (LT) recipients at our transplantation canter.Materials and methods: All patients who underwent LT between January 2004 and December 2013 and whose data were accessible were included in the study. Demographic features, tuberculin skin test (TST) results, and TB prevalence were recorded. Characteristics of LT recipients who developed TB were evaluated.Results: A total of 403 patients underwent LT during this period. Mean age was 47.27 ± 11.04 years; 280 (69.47%) were males. The TST was administered to 108 (25.91%) and the QuantiFERON-TB test to 1 patient. TST positivity was determined in 28 (25.93%). Latent TB infection (LTBI) treatment was not recommended to any of the LT candidates. In the posttransplant period, 5 patients (1.24%) developed TB over a median duration of 14 (min: 7, max: 84) months, 2 of whom were found to have had LTBI in the pretransplant period.Conclusion: The prevalence of TB in LT recipients at our center was similar to that in the current literature. LTBI screening, including risk factor assessment and TST/QuantiFERON-TB testing, is necessary in the early diagnostic workup for TB in LT recipients.
- Published
- 2018
27. Neglected prognostic importance of ileal resection in patients with peritoneal metastasis
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Tayfun Bişgin, I. Basara, Sulen Sarioglu, Sevda Özkardeşler, Selman Sökmen, B. Sakaoglu, and Tarkan Unek
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medicine.medical_specialty ,Peritoneal metastasis ,Nutrition and Dietetics ,business.industry ,Endocrinology, Diabetes and Metabolism ,Internal medicine ,Medicine ,In patient ,business ,Gastroenterology ,Ileal resection - Published
- 2020
28. Outcomes following deceased and live donor liver transplantation for the indication of acute liver failure: a multicenter experience
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Ilker Turan, Murat Aladag, Murat Harputluoglu, Sezai Yilmaz, Genco Gencdal, Kamil Yalçin Polat, Figen Özçay, Mesut Akarsu, Tarkan Unek, Zeki Karasu, Murat Zeytunlu, Hale Gokcan Sumer, Erdal Birol Bostanci, Aysun Caliskan Kartal, Deniz Balci, Murat Dayangac, Dinc Dincer, Haydar Adanir, Hakan Dursun, Murat Taner Gulsen, Feyza Gunduz, Hatice Yasemin Balaban, Gökhan Kabaçam, Murat Akyildiz, Fulya Günsar, Ulus Akarca, Ahmet Gurakar, and Ramazan Idilman
- Subjects
Hepatology - Published
- 2020
29. YÜKSELMİŞ KAN EOZİNOFİL SAYISI CANLI VERİCİLİ KARACİĞER TRANSPLANTASYONU SONRASI GEÇ ORTAYA ÇIKAN AKUT REJEKSİYONUN (GOAR) TAHMİNİNDE ÖNEMLİ BİR BELİRTEÇ OLABİLİR Mİ?
- Author
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Ibrahim Astarcioglu, Ozgul Sagol, Tarkan Unek, Sevda Özkardeşler, Alikadir Değirmenci, Hülya Ellidokuz, Mucahit Ozbilgin, Cihan Agalar, and Tufan Egeli
- Subjects
Applied Mathematics ,General Mathematics ,Medicine ,Yükselmiş Serum Eozinofil değeri ,Tıp - Abstract
Amaç: ‘’Geç dönemde ortaya çıkan akut rejeksiyon”(GOAR); canlı vericili karaciğer nakillerinde(CVKN) 6.aydan sonraki rejeksiyonlardır. Tanısında; karaciğer biyopsisi yerine daha az noninvaziv bir yöntem olan artmış kan Eozinofil sayısı prediktif bir biomarker olarak kullanılabilir mi? Yöntem ve Metod : Araştırmamızda Dokuz Eylül Üniversitesi Tıp Fakültesi Genel Cerrahi Karaciğer Nakli Biriminde Haziran 2000- 2017 yıllarında CVKN yapılan, 18 yaşından büyük ve en az 6 ay sağkalımı olan hastalar çalışmaya dahil edilmiştir. GOAR gelişen hastaların; demografik verileri, olması gereken greft ağırlığı/mevcut greft ağırlığı oranı, soğuk iskemi süreleri, Child ve MELD skorları, immünossüpresif rejimleri ve komorbiditeleri incelendi. GOAR’dan şüphelenilen olguların biyopsi sonuçları ve biyopsi öncesi kan laboratuvar değerleri retrospektif olarak tarandı. Bulgular: Çalışmada 240 Karaciğer naklinden 65(%27)’ine rejeksiyondan şüphelenilerek karaciğer biyopsisi yapıldı. Olguların 28(%43)’inde GOAR tespit edilirken, 37(%57)’sinde herhangi bir rejeksiyon bulgusuna rastlanmadı. Biyopsiler Banff patoloji skorlamasına göre; 10(%35.7)’u hafif,13(%46.4)’ü orta ve 5(%17.9)’i şiddetli rejeksiyonlardı. Ortalama izlem süresi 3056(184-4877) gündü. Biyopsi yapılma zamanı ortalama postoperatif 660’ıncı(180-4354) gündü. Yükselmiş kan Eozinofil değeri ile GOAR gelişimi arasında istatistiksel olarak anlamlı bir ilişki saptandı (p
- Published
- 2018
30. DOES THE LIGATION OF GASTRODUODENAL ARTERY PERFORMED AT ARTERIAL STEAL SYNDROME IN LIVING DONOR LIVER TRANSPLANTATION CAUSE COMPLICATIONS IN DUCT-TO-DUCT BILIARY ANASTOMOSIS?
- Author
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Cihan Agalar, Tarkan Unek, Ibrahim Astarcioglu, Serhan Derici, Mucahit Ozbilgin, Mesut Akarsu, Canan Altay, Tufan Egeli, and Sevda Özkardeşler
- Subjects
medicine.medical_specialty ,business.industry ,Biliary anastomosis ,Karaciğer nakli,Gastroduodenal arter ligasyonu,safra yolu komplikasyonu ,Surgery ,Gastroduodenal artery ,medicine.anatomical_structure ,Health Care Sciences and Services ,medicine.artery ,medicine ,Liver transplantation,ligation of gastroduodenal artery,bile tract complication ,Sağlık Bilimleri ve Hizmetleri ,Living donor liver transplantation ,business ,Ligation ,Duct (anatomy) ,Arterial steal syndrome - Abstract
Objective: It was aimed to evaluate whetherthe ligation of gastroduodenal artery performed for the treatment of arterialsteal syndrome diagnosed during hepatic artery reconstruction in living donorliver transplantation (LDLT) cause complications in duct-to-duct bileanastomoses.Materialand Method: This retrospective cohort studyincluded patients older than 18 years of age who underwent LDLT and survivedfor at least 6 months at the Liver Transplantation Unit of General SurgeryDepartment in Medical Hospital of Dokuz Eylul University between June 2000 andJuly 2017. The patients' demographic data, graft weight, duration of coldischemia, Child and MELD scores, immunosuppressive agents they used and the presenceof postoperative biliary complications after the gastroduodenal artery ligationwere investigated.Results:Gastroduodenal artery steal syndrome was diagnosed through Dopplerultrasonography in 11 (4.5%) of 240 patients with LDLT intraoperatively duringhepatic artery reconstruction. Of the biliary anastomoses, 8 (72.7%) wereindent duct-to-duct anastomosis and 3 (27.3%) were Roux-en-YHepaticojejunostomy. The average follow-up time was 3260 (371-4357) days. Noneof the 8 patients who underwent duct-to-duct biliary anastomosis developedbiliary tract complication (p, Amaç: Canlıvericili karaciğer transplantasyonlarında (CVKT) hepatik arter rekonstrüksiyonuesnasında tanı konulan arteryel çalma sendromu’nun tedavisinde yapılan gastroduodenal arterligasyonunun, “duct-to-duct” safra anastomozlarında komplikasyonlara olanetkisinin değerlendirilmesi amaçlanmıştır.Gereç ve Yöntem: Buçalışma retrospektif bir kohort çalışmadır. Dokuz Eylül Üniversitesi HastanesiGenel Cerrahi Karaciğer Nakli Biriminde Haziran 2000-2017 yıllarında CVKTyapılan 18 yaşından büyük ve en az 6 ay sağ kalımı olan hastalar çalışmayadahil edildi. Hastaların demografik verileri, greft ağırlığı, soğuk iskemisüreleri, Child ve MELD skorları, kullandıkları immünossüpresif ajanlar veduct-to-duct safra anastomozu yapılan olgularda gastroduodenal arter ligasyonusonrası postoperatif biliyer komplikasyonların ortaya çıkıp çıkmadığıincelendi.Bulgular: CVKTyapılan 240 hastanın hepatik arter rekonstrüksiyonu esnasında intraoperatifolarak 11’inde (%4,5) Doppler Ultrasonografi ile gastroduodenal arter çalmasendromu tanısı konuldu. Hastaların safra yolu anastomozları; 8(%72,7)’inde duct-to-ductanastomoz ve 3(%27,3)’ünde Roux-en-Y Hepatikojejunostomi şeklindeydi. Ortalamaizlem süresi 3260 (371-4357) gündü. Takiplerinde duct-to-duct safra yoluanastomozu yapılan 8 olgunun hiç birisinde safra yolu komplikasyonu gelişmediğigörüldü (p
- Published
- 2018
31. The Role of Log Odds of Positive Lymph Nodes in Predicting the Survival after Resection for Ampullary Adenocarcinoma
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Ozgul Sagol, Nesrin Akturk, Ibrahim Astarcioglu, Anıl Aysal, T. Unek, Mucahit Ozbilgin, Mesut Akarsu, Tufan Egeli, Hülya Ellidokuz, Huseyin Salih Semiz, Müjde Soytürk, Tarkan Unek, and Cihan Agalar
- Subjects
0301 basic medicine ,Adult ,Male ,Cancer Research ,medicine.medical_specialty ,Ampulla of Vater ,Log odds ,medicine.medical_treatment ,Perineural invasion ,Gastroenterology ,Pathology and Forensic Medicine ,Resection ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,medicine ,Overall survival ,Odds Ratio ,Humans ,Lymph node ,Aged ,Neoplasm Staging ,business.industry ,Ampullary Adenocarcinoma ,General Medicine ,Middle Aged ,Pancreaticoduodenectomy ,Prognosis ,Pancreatic Neoplasms ,Survival Rate ,030104 developmental biology ,medicine.anatomical_structure ,Oncology ,030220 oncology & carcinogenesis ,Lymphatic Metastasis ,Female ,Lymph ,business ,Carcinoma, Pancreatic Ductal - Abstract
Lymph node metastasis is a important factor on survival in ampullary adenocarcinoma. Log odds of positive lymph nodes (LODDS) is a novel prognostic indicator on lymph node status. We aimed to evaluate the prognostic impact of LODDS for the patients with ampullary adenocarcinoma who underwent R0 pancreaticoduodenectomy. The study includes 42 patients.. LODDS was calculated as "log (number of metastatic lymph nodes+0.5)/(number of total harvested nodes - metastatic lymph nodes+0.5)". LODDS subgroups were created based on their LODDS value: LODDS1(LODDS - 0.5). The mean survival time was 72.7 +/- 7.82 months. Survival rates for 1, 3 and 5 years were 93%, 65% and 45%, respectively. The mean LODDS value was -1.0466 +/- 0.51. LODDS subgroups show strong correlation with Overall Survival(OS). The mean survival were 114.8, 81.8, 56.6 and 25.6 months in LODDS subgroups 1, 2, 3 and 4, respectively (Log-rank; p = 0.002), in addition LOODS values shows correlation with perineural invasion and micro vascular invasion (p = 0.015 and p = 0.001 respectively). Findings in our patient group support the hypothesis that LODDS subgroups correlate with OS, and that value of LODDS has considerable role in prediction of OS as well.
- Published
- 2018
32. Does the Stump Knotting Technique and Specimen Retrieval Method Effects Morbidity and Outcomes in Laparoscopic Appendectomy?
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Nilay Boztaş, Cihan Agalar, Tarkan Unek, Mucahit Ozbilgin, Sulen Sarioglu, Tufan Egeli, Serhan Derici, Ali Durubey Çevlik, and Süleyman Özkan Aksoy
- Subjects
medicine.medical_specialty ,business.industry ,medicine.disease ,Intraabdominal abscess ,Appendicitis ,Appendix ,Extracorporeal ,Surgery ,Knot tying ,surgical procedures, operative ,Anesthesiology and Pain Medicine ,medicine.anatomical_structure ,Knot (unit) ,Emergency Medicine ,Medicine ,Abdomen ,business ,Surgical site infection - Abstract
BACKGROUND Stump closure is the most important part of a laparoscopic appendectomy (LA). Closing the appendix base with knot tying is the most cost-effective method. The defined risk factor for surgical site infection (SSI) after LA is the contamination of trocar entry area by inflamed appendicitis. This study aims to compare the single and double knot technique for stump control and specimen removal methods in LA. METHODS The data of patients who underwent LA between January 2015 and January 2017 were obtained from prospectively collected database. Single and double knot technique, specimen removal method, operation duration, hospital stay, and perioperative-postoperative complications were compared. RESULTS Extracorporeal double knot was used in 134 patients (63%), and single knot was used in 79 patients (37%). There was no difference between operation duration in the two groups (p=0.97). No stump leakage was observed in any patient. Intraabdominal abscess developed in three patients (1.4%). Appendix was removed from the abdomen directly in 101 patients (47%) and using specimen retrieval bag in 112 (53%). SSI developed in five patients (2.3%), and appendices of all of these five patients were removed from abdomen without using specimen retrieval bag. No SSI was detected in the group that used the specimen retrieval bag (p=0.02). CONCLUSION Single or double knot(s) tying can be defined as safe and cost-effective stump closure method. The risk of developing SSI can be reduced using specimen retrieval bag.
- Published
- 2018
33. An Incidentally Detected Case of Trabecular Type Gallbladder Duplication: Multidetector Computed Tomography and Magnetic Resonance Cholangiopancreatography Imaging Findings: Case Report
- Author
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Ali Kadir Değirmenci, Tufan Egeli, Funda Obuz, Tarkan Unek, and Naciye Sinem Gezer
- Published
- 2016
34. Alpha-Fetoprotein-Secreting Gallbladder Carcinoma: a Case Report
- Author
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Funda Obuz, Guray Akturk, Sedat Karademir, Mucahit Ozbilgin, Tufan Egeli, Ozgul Sagol, Ibrahim Astarcioglu, and Tarkan Unek
- Subjects
Pathology ,medicine.medical_specialty ,medicine.medical_treatment ,Biopsy ,Pancreaticoduodenectomy ,Diagnosis, Differential ,03 medical and health sciences ,0302 clinical medicine ,Duodenal Neoplasms ,Stomach Neoplasms ,medicine ,Carcinoma ,Hepatectomy ,Humans ,Colectomy ,Peritoneal Neoplasms ,medicine.diagnostic_test ,business.industry ,Gallbladder ,Liver Neoplasms ,Gastroenterology ,Middle Aged ,medicine.disease ,Magnetic Resonance Imaging ,medicine.anatomical_structure ,Oncology ,Gallbladder surgery ,Liver ,030220 oncology & carcinogenesis ,Colonic Neoplasms ,030211 gastroenterology & hepatology ,Female ,Gallbladder Neoplasms ,alpha-Fetoproteins ,business ,Alpha-fetoprotein ,Tomography, X-Ray Computed ,Liver pathology - Published
- 2017
35. Long-term Results of Living Donors in Simultaneous Kidney and Liver Transplantations
- Author
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Mucahit Ozbilgin, Tufan Egeli, Cihan Agalar, Sedat Karademir, Ali Çelik, Tarkan Unek, Seymen Bora, K. Atilla, Zekai Serhan Derici, Ibrahim Astarcioglu, Naciye Cigdem Arslan, and Hüseyin Gülay
- Subjects
Adult ,Liver Cirrhosis ,medicine.medical_specialty ,Cirrhosis ,medicine.medical_treatment ,030230 surgery ,Liver transplantation ,Primary hyperoxaluria ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,Postoperative Complications ,medicine ,Living Donors ,Humans ,Kidney transplantation ,Transplantation ,Kidney ,business.industry ,medicine.disease ,Kidney Transplantation ,Nephrectomy ,Surgery ,Liver Transplantation ,medicine.anatomical_structure ,Hyperoxaluria, Primary ,Kidney Failure, Chronic ,030211 gastroenterology & hepatology ,Female ,Hepatectomy ,business - Abstract
Introduction Because of the shortage of organs available for transplantation, living related sequential transplantation with the use of liver and a kidney from the same donor has emerged as a reasonable therapeutic alternative. However, there is insufficient literature about the complications that living donors experience after simultaneous kidney and liver transplantations. Methods From December 2001 to October 2009, 5 living donors provided simultaneous donation of livers and kidneys and 1 living donor donated first her kidney and then her liver. Demographic data of the donors and information concerning the surgery and postoperative observation were collected prospectively. Results All of the donors were female. The median age was 27.5 (range, 19–36) years. Indications requiring the simultaneous transplantation of livers and kidneys were primary hyperoxaluria type 1 (PH1) in 5 potential recipients and cirrhosis due to chronic hepatitis B infection and idiopathic chronic renal insufficiency in 1 potential recipient. Four recipients underwent right hepatectomy (segments 5–8) and right nephrectomy; 1 recipient underwent left hepatectomy (segments 2–4) and right nephrectomy; and 1 recipient underwent left lobectomy (segments 2–3) and right nephrectomy. There were no complications except in 1 donor (postoperative ileus). No donor developed hypertension or microalbuminuria. Conclusions With the right indications, appropriate preoperative evaluation, meticulous surgical technique, proper postoperative care, and long-term close monitoring to minimize morbidity and mortality risks, liver and kidney donation from the same donor can be considered for simultaneous kidney and liver transplantation.
- Published
- 2017
36. En Bloc Pancreaticoduodenectomy for Locally Advanced Right Colon Cancers
- Author
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Selman Sökmen, Tarkan Unek, Aras Emre Canda, and Cihan Agalar
- Subjects
Male ,medicine.medical_specialty ,Article Subject ,Duodenum ,Colorectal cancer ,medicine.medical_treatment ,Adenocarcinoma ,030230 surgery ,lcsh:RC254-282 ,Pancreaticoduodenectomy ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Humans ,Neoplasm Invasiveness ,Pancreas ,Colectomy ,Aged ,Retrospective Studies ,Pelvic exenteration ,business.industry ,General surgery ,Mortality rate ,Perioperative ,Middle Aged ,medicine.disease ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Surgery ,Oncology ,030220 oncology & carcinogenesis ,Colonic Neoplasms ,Right Colectomy ,Female ,business ,Research Article - Abstract
Locally advanced right colon cancer may invade adjacent tissue and organs. Direct invasion of the duodenum and pancreas necessitates an en bloc resection. Previously, this challenging procedure was associated with high morbidity and mortality; however, today, this procedure can be done more safely in experienced centers. The aim of this study is to report our experience on en bloc right colectomy with pancreaticoduodenectomy for locally advanced right colon cancers. Between 2000 and 2012, 5 patients underwent en bloc multivisceral resection. No major morbidities or perioperative mortalities were observed. Median disease-free survival time was 24.5 months and median overall survival time was 42.1 (range: 4.5–70.4) months in our series. One patient lived 70 months after multivisceral resection and underwent cytoreductive surgery and total pelvic exenteration during the follow-up period. In locally advanced right colon tumors, all adhesions should be considered as malign invasion and separation should not be done. The reasonable option for this patient is to perform en bloc pancreaticoduodenectomy and right colectomy. This procedure may result in long-term survival with acceptable morbidity and mortality rates. Multidisciplinary teamwork and multimodality treatment alternatives may improve the results.
- Published
- 2017
37. Can primary failure of arteriovenous fistulas be anticipated?
- Author
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Mustafa Secil, Aykut Sifil, Tarkan Unek, Dilek Gibyeli Genek, Canan Altay, and Taner Camsari
- Subjects
Cephalic vein ,medicine.medical_specialty ,business.industry ,Fistula ,medicine.medical_treatment ,Arteriovenous fistula ,Hematology ,medicine.disease ,Thrombosis ,Surgery ,Nephrology ,medicine.artery ,medicine ,Hemodialysis ,Radial artery ,Brachial artery ,Endothelial dysfunction ,business - Abstract
Primary failure, early thrombosis, and inadequate maturation are the main complications encountered in arteriovenous fistulas. Doppler ultrasonographic assessment of flow-mediated dilatation (FMD) is currently used for the early diagnosis of atherosclerosis. Clinical experience in the use of FMD for preoperative assessment of vasculature is rather limited; therefore, we sought to elucidate the relationship between preoperative FMD and primary failure of the fistula. Thirty-three patients with end-stage renal disease who were admitted to our hospital between January and July 2005 were included in our study. Medical histories were established and the internal diameter, wall thickness, peak systolic flow rate, and resistive index (RI) were measured in the cephalic vein and radial and brachial arteries. Flow-mediated dilatation and nitrate-mediated dilatation (NMD) of the brachial artery were assessed. Fistulas were evaluated 48 hours and 30 days postoperatively. Brachial arterial internal diameter was lower in all fistulas that developed primary failure in 48 hours (0.4 ± 0.07 cm vs. 0.35 ± 0.07 cm, P = 0.016). The radial artery RI was found to be significantly elevated in fistulas with both early (48-hour) and late-term (30-day) failure (0.9 ± 0.08 vs. 0.68 ± 0.3, P = 0.01, and 0.86 ± 0.8 vs. 0.67 ± 0.3, P = 0.038, respectively). The brachial artery peak systolic flow rate was significantly reduced in patients in the radiocephalic fistula group that developed early and late-term failure (42.9 ± 12 cm/sec vs. 68.4 ± 10 cm/sec, P = 0.01, and 44.1 ± 13 cm/sec vs. 57.7 ± 16 cm/sec, P = 0.038, respectively). Our study, constrained by a smaller, older patient group, was unable to show a statistically significant correlation between FMD, NMD, and fistula success. Any single parameter may not be sufficient to assess vascular health preoperatively. A multifactorial approach incorporating parameters evaluating arterial and venous function might be more effective in predicting fistula success. Further studies on larger patient groups may indeed demonstrate the value of these assessments.
- Published
- 2014
38. Effects of Blood Products on Nosocomial Infections in Liver Transplant Recipients
- Author
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Sedat Karademir, Reci Meseri, Meltem Cimen, Mucahit Ozbilgin, Tarkan Unek, Mert Akan, Vildan Avkan-Oguz, and Sevda Özkardeşler
- Subjects
Adult ,Liver Cirrhosis ,Male ,medicine.medical_specialty ,Adolescent ,Gastrointestinal Diseases ,Organ transplantation ,Plasma ,Young Adult ,Risk Factors ,Blood product ,Internal medicine ,Humans ,Medicine ,Risk factor ,Respiratory Tract Infections ,Retrospective Studies ,Cross Infection ,Transplantation ,business.industry ,Incidence ,Mortality rate ,Odds ratio ,Middle Aged ,Liver Transplantation ,Urinary Tract Infections ,Female ,Fresh frozen plasma ,Erythrocyte Transfusion ,Packed red blood cells ,business - Abstract
OBJECTIVES Infection is the most severe complication after an organ transplant. Blood cell transfusion is an independent risk factor for adverse events, including infection in the recipient. This study sought to evaluate the effect of blood product transfusions on nosocomial infections in liver transplant patients. MATERIALS AND METHODS Patients who underwent a liver transplant at our hospital between 2003 and 2010 were recruited for this study. Exclusion criteria were incomplete records, patients who were hospitalized for more than 48 hours during the 4 weeks before transplant, and pediatric transplants. Incidence of nosocomial infections, which were defined as infections occurring within 30 days after transplant was the primary endpoint. RESULTS The incidence of nosocomial infections was 28.7%. The number of transfusions of packed red blood cells and fresh frozen plasma was significantly higher in patients with nosocomial infection compared with patients without nosocomial infection (P = .018 and P = .039). Blood products dose-dependently contributed to nosocomial infections. Transfusions of ≥ 7.5 units of red blood cells (odds ratio: 2.8) or ≥ 12.5 units of fresh frozen plasma (odds ratio: 3.27) were associated with nosocomial infections (P = .042 and P = .015). The infection-related mortality rate was 10.3%. CONCLUSIONS Blood product transfusions are associated with an increased rate of nosocomial infections, which contributes to higher morbidity and mortality.
- Published
- 2013
39. Evaluation of the Effectiveness of Sugammadex for Verapamil Intoxication
- Author
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Gonca Kamacı, Ali Günerli, Volkan Hanci, Mucahit Ozbilgin, Beyza Kucukoztas, Mehmet Ensari Guneli, Şule Özbilgin, Bülent Serhan Yurtlu, and Tarkan Unek
- Subjects
Respiratory rate ,Drug Evaluation, Preclinical ,Toxicology ,Cardiovascular System ,Sugammadex ,Electrocardiography ,Bolus (medicine) ,Heart Rate ,Heart rate ,medicine ,Animals ,Drug Interactions ,Rats, Wistar ,Asystole ,Pharmacology ,Cardiotoxicity ,Dose-Response Relationship, Drug ,business.industry ,Lethal dose ,General Medicine ,medicine.disease ,Heart Arrest ,Rats ,Verapamil ,Anesthesia ,business ,gamma-Cyclodextrins ,medicine.drug - Abstract
Previous studies have shown that medications from the cyclodextrin family bind to verapamil. The aim of our study was to determine whether sugammadex could bind to verapamil and prevent the cardiovascular toxicity of that drug. Twenty-eight sedated Wistar rats were infused with verapamil at 37.5 mg/kg/h. Five minutes after the start of infusion, the animals were treated with a bolus of either 16 mg/kg, 100 mg/kg or 1000 mg/kg sugammadex. The control group was treated with an infusion without sugammadex. The heart rate and respiratory rate were monitored, and an electrocardiogram was recorded. The primary end-point was the time to asystole. The verapamil infusion continued until the animals arrested. The asystole time for the S16 group was significantly longer compared to those for the control and S1000 groups (p
- Published
- 2013
40. Perforation of jejunal diverticulitis: Report of three cases
- Author
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Koray Atila, Tarkan Unek, Mucahit Ozbilgin, Tufan Egeli, and Ozgul Sagol
- Subjects
business.industry ,Medicine ,Surgery ,business - Published
- 2013
41. The prognostic value of detecting symptomatic or asymptomatic recurrence in patients with gastric cancer after a curative gastrectomy
- Author
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Dilek Yavuzer, Ahmet Bilici, Bala Basak Oven Ustaalioglu, T. Unek, Tarık Salman, Mesut Seker, Mehtat Unlu, Ugur Yilmaz, Mahmut Gumus, Cem Gezen, Mehmet Aliustaoglu, and Tarkan Unek
- Subjects
Adult ,Male ,medicine.medical_specialty ,medicine.medical_treatment ,Recurrent gastric cancer ,Asymptomatic ,Gastroenterology ,Gastrectomy ,Stomach Neoplasms ,Internal medicine ,Humans ,Medicine ,In patient ,Stage (cooking) ,Aged ,Neoplasm Staging ,Retrospective Studies ,Aged, 80 and over ,Tumor size ,business.industry ,Cancer ,Middle Aged ,Prognosis ,medicine.disease ,Curative gastrectomy ,Surgery ,Multivariate Analysis ,Female ,Neoplasm Recurrence, Local ,medicine.symptom ,business - Abstract
Although studies have investigated whether a routine follow-up should be performed after a gastrectomy, no consensus has been reached on the significance of the follow-up or the optimal surveillance protocol. In the present study, we evaluated the significance of the presence or absence of symptoms in the detection of recurrences after curative gastrectomy for gastric cancer.We retrospectively analyzed 173 patients with recurrent gastric cancer who underwent radical gastrectomy. We evaluated the prognostic significance of the presence of cancer-related symptoms at the diagnosis of recurrence, and the relationship between the presence of symptoms and other clinicopathological factors.We detected a symptomatic recurrence in 42.2% of patients. The presence of symptoms were significantly correlated with tumor size, pT stage, pN stage, pathologic stage, and short disease-free interval (12 mo). The median disease-free survival (DFS), post-recurrence survival (PRS), and overall survival (OS) times for patients with asymptomatic recurrence were significantly longer than those of patients with symptomatic recurrence (disease-free survival was corrected as DFS, 11.1 versus 9.3 mo, P0.001; PRS, 4.9 versus 3.1 mo, P = 0.02; OS, 18.3 versus 12.3 mo, P = 0.001, respectively). Multivariate analysis showed that the presence of cancer-related symptoms (P = 0.033; hazard ratio [HR], 0.81) was an independent prognostic factor for PRS, as were short disease-free intervals (P0.001; HR, 2.42), age (P = 0.02; HR, 1.53), and the presence of chemotherapy in recurrence (P = 0.001; HR, 0.49). In addition, multivariate analysis indicated that the presence of symptoms, short disease-free interval, and age were also independent prognostic indicators for OS.Our results demonstrate that symptomatic recurrence is an important prognostic factor for PRS of patients with gastric cancer after a curative gastrectomy. The presence of symptomatic recurrence may be a new and beneficial prognostic marker to evaluate biologic aggressiveness, which is an important determinant of survival at the time of recurrence diagnosis during a follow-up for gastric cancer.
- Published
- 2013
42. A Novel Technique for Managing Pancreaticojejunal Anastomotic Leak after Pancreaticoduodenectomy
- Author
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Ibrahim Astarcioglu, Mustafa Goztok, Tarkan Unek, Mucahit Ozbilgin, and Tufan Egeli
- Subjects
Novel technique ,Leak ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Fistula ,lcsh:Surgery ,Case Report ,lcsh:RD1-811 ,030230 surgery ,Anastomosis ,medicine.disease ,Pancreaticoduodenectomy ,Periampullary Region ,Surgery ,03 medical and health sciences ,0302 clinical medicine ,Pancreatectomy ,medicine ,Pancreatic Anastomotic Leakage ,030211 gastroenterology & hepatology ,Pharmacology (medical) ,business - Abstract
Pancreaticoduodenectomy (Whipple’s procedure) remains the only definitive treatment option for tumors of the periampullary region. The most common and life-threatening complications following the procedure are pancreatic anastomotic leakage and subsequent fistula formation. When these complications occur, treatment strategy depends on the severity of anastomotic leakage, with patients with severe leakages requiring reoperation. The optimal surgical method used for reoperation is selected from among different options such as wide drainage, definitive demolition of the pancreaticojejunal anastomosis and performing a new one, or completion pancreatectomy. Here we present a novel, simple technique to manage severe pancreatic leakage via ligamentum teres hepatis patch.
- Published
- 2016
43. Solid-Pseudopapillary neoplasm of the pancreas: A clinicopathological review of 20 cases including rare examples
- Author
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Funda Obuz, Erdener Özer, Anil Aysal Agalar, Cihan Agalar, Ozgul Sagol, Ibrahim Astarcioglu, Mucahit Ozbilgin, Tarkan Unek, Tufan Egeli, Ayca Ersen, and Mustafa Olguner
- Subjects
Adult ,Male ,Pathology ,medicine.medical_specialty ,Adolescent ,Biopsy, Fine-Needle ,Vimentin ,Pathology and Forensic Medicine ,Metastasis ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Biomarkers, Tumor ,Pancreatic mass ,medicine ,Humans ,Neoplasm ,Child ,Angioinvasion ,biology ,business.industry ,Cell Biology ,Middle Aged ,medicine.disease ,Immunohistochemistry ,Carcinoma, Papillary ,Pancreatic Neoplasms ,medicine.anatomical_structure ,Giant cell ,030220 oncology & carcinogenesis ,Endocrine neoplasm ,biology.protein ,Female ,030211 gastroenterology & hepatology ,Pancreas ,business - Abstract
Aims Solid-pseudopapillary neoplasm (SPN) is an uncommon malignant tumor of the pancreas with a favorable prognosis unlike other pancreatic neoplasms. We investigated the clinicopathological features of 20 patients with SPN in details. Methods The patients diagnosed as SPN in Dokuz Eylul University Hospital between January 2005 and March 2016 were reviewed in terms of clinical and histopathological data. Results Mean age of the patients was 33. Three of our cases were male and 4 were children. Some patients had synchronuous malignancies. Nine patients were diagnosed by fine needle aspiration cytology (FNAC). One of our tumors had 2 × 1 mm of pancreas endocrine neoplasm in addition to SPN. One case had foci of atypical and multinucleated giant cells. All cases were positive for vimentin and CD10 antibodies and most were positive for PR and β-catenin. The mean follow-up duration was 40 mo (range 2–110 mo). Only one case showed liver metastasis. Conclusion Herein we present a series of 20 patients with 3 male and 4 pediatric cases, almost half of which were diagnosed with FNAC findings, and most of which are clinically being followed with one patient showing progression. Our series includes rare examples like collision tumor of SPN and pancreas endocrine neoplasm, SPN with multinucleated giant cells. Also cases with no surgical treatment and no progression, as well as cases with synchronous malignancies are presented. We believe that FNAC findings of any pancreatic mass should be investigated in detail for the designation of a therapy plan especially for the patients with high operation risks. The findings in our series also show that extensive necrosis, angioinvasion, perineurial invasion and larger tumor size might be predictive for worse prognosis and these patients should be more closely followed up.
- Published
- 2016
44. Bimonthly Regimen of High-Dose Leucovorin, Infusional 5-Fluorouracil, Epirubicin and Cisplatin (Modified ECF) as Adjuvant Chemotherapy in Resected Gastric Adenocarcinoma
- Author
-
Ilhan Oztop, Koray Atilla, Ugur Yilmaz, Tarkan Unek, Sulen Sarioglu, Ilkay Tugba Unek, Tulay Akman, Hülya Ellidokuz, and Seymen Bora
- Subjects
Adult ,Male ,Oncology ,medicine.medical_specialty ,Adjuvant chemotherapy ,Leucovorin ,Antineoplastic Agents ,Adenocarcinoma ,Disease-Free Survival ,Drug Administration Schedule ,Gastric adenocarcinoma ,Recurrence ,Stomach Neoplasms ,Internal medicine ,Drug Discovery ,polycyclic compounds ,medicine ,Humans ,Pharmacology (medical) ,skin and connective tissue diseases ,Survival rate ,Aged ,Neoplasm Staging ,Retrospective Studies ,Pharmacology ,Cisplatin ,business.industry ,General Medicine ,Middle Aged ,medicine.disease ,Survival Rate ,carbohydrates (lipids) ,Regimen ,Infectious Diseases ,Chemotherapy, Adjuvant ,Fluorouracil ,Female ,business ,medicine.drug ,Epirubicin - Abstract
Background: The administration of the de Gramont regimen in combination with cisplatin and epirubicin (modified ECF) has previously been reported as a treatment for advanced gastric cancer, but here we report this regimen combination in an adjuvant setting for the first time. Methods: Forty-eight patients with curatively resected gastric cancer were treated. Each 2-week cycle consisted of epirubicin (50 mg/m2), cisplatin (50 mg/m2), 5-fluorouracil (5-FU) IV bolus (400 mg/m2) and 5-FU IV (2,400 mg/m2) over 46 h plus leucovorin IV (400 mg/m2) over 2 h. Postoperative chemoradiotherapy was also administered to the patients when indicated. We retrospectively reviewed the patients who were treated with modified ECF. Results: The median disease-free survival (DFS) was 40.7 months and the 1-, 3- and 5-year DFS rates were 78.5, 55.7 and 44.6%, respectively. The most common grade 3–4 toxicities were hematological and gastrointestinal. Conclusion: A modified ECF regimen may be an effective and convenient treatment with tolerable toxicities for the adjuvant treatment of gastric cancer. It may provide an alternative regimen to the standard ECF when a continuous ambulatory infusion pump is not feasible or not preferred by the patient.
- Published
- 2012
45. What Is the Role of the Abdominal Perfusion Pressure for Subclinical Hepatic Dysfunction in Laparoscopic Cholecystectomy?
- Author
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Hüseyin Gülay, Seymen Bora, Gül Ergör, Sevda Özkardeşler, Sanem Guler, Tarkan Unek, Cem Terzi, and Koray Atila
- Subjects
Adult ,Male ,medicine.medical_specialty ,Liver Function Tests ,Pneumoperitoneum ,Pressure ,Humans ,Medicine ,Prospective Studies ,Prospective cohort study ,Aged ,Subclinical infection ,Chi-Square Distribution ,medicine.diagnostic_test ,business.industry ,Middle Aged ,medicine.disease ,Surgery ,Cholecystectomy, Laparoscopic ,Liver ,Alkaline phosphatase ,Female ,Liver function ,business ,Hepatic dysfunction ,Liver function tests ,Pneumoperitoneum, Artificial ,Perfusion - Abstract
Subclinical hepatic dysfunction after laparoscopic cholecystectomy (LC) has been described in the literature. However, this alteration is not encountered in all patients. In order to address this situation, a prospective study was conducted to investigate the effect of abdominal perfusion pressure (APP) on liver function tests after LC performed under constant intra-abdominal pressure (IAP).Of 78 patients who underwent LC between May 2007 and October 2007, 40 patients were eligible for the study. In all the patients, six parameters of liver function (aspartate aminotransferase, alanine aminotransferase, direct bilirubin, indirect bilirubin, alkaline phosphatase, and gamma-glutamyltransferase) were assessed before and 24 hours after surgery. Patients who showed more than a 100% increase in at least one parameter (group 1) were compared to those who did not (group 2) regarding age, sex, body weight, body height, operation time, pneumoperitoneum time, IAP, preoperative, and intraoperative APP.Of the patients, 37.5% showed more than a 100% increase in at least one parameter of liver function. No significant difference was found between the two groups with regard to age, sex, body weight, body height, operation time, pneumoperitoneum time, and IAP. There were significant increase in AST and ALT at 24 hours postoperatively in group 1, as compared with group 2 (P = 0.000, P = 0.001). In comparison of preoperative APP with intraoperative APP values, group 1 showed a statistically significant decrease (P = 0.000), while no difference was found in group 2.Subclinical hepatic dysfunction after LC could mostly be attributed to the negative effects of the pneumoperitoneum on hepatic blood flow. For the evaluation of hepatic hypoperfusion, APP may be a new criterion as a determinant of interaction with mean arterial pressure (MAP) and IAP.
- Published
- 2009
46. Anesthesia-Related Complications in Living Liver Donors: The Experience from One Center and the Reporting of One Death
- Author
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Tarkan Unek, Ergin Alaygut, Deniz Özzeybek, Sedat Karademir, Sevda Özkardeşler, Ibrahim Astarcioglu, Huseyin Astarcioglu, Mert Akan, and Zahide Elar
- Subjects
Adult ,Male ,Risk ,medicine.medical_specialty ,Adolescent ,medicine.medical_treatment ,Liver disease ,Fatal Outcome ,Living Donors ,medicine ,Hepatectomy ,Humans ,Immunology and Allergy ,Anesthesia ,Pharmacology (medical) ,Intraoperative Complications ,Retrospective Studies ,Transplantation ,Urinary retention ,business.industry ,Middle Aged ,medicine.disease ,Thrombosis ,Liver Transplantation ,Pulmonary embolism ,Surgery ,Treatment Outcome ,Liver ,Female ,medicine.symptom ,Complication ,business ,Subclavian vein - Abstract
Living donor liver transplantation has become an alternative therapy for patients with end-stage liver disease. Donors are healthy individuals and donor safety is the primary concern. The objective of this study was to evaluate the anesthetic complications and outcomes for our donor cases; we report one death. The charts of the patients who underwent donor hepatectomy from February 1997 to June 2007 were retrospectively reviewed. Right hepatectomy (resection of segments 5-8) was done in 101 donors, left lobectomy (resection of segments 2-3) in 11 donors, and left hepatectomy (resection of segments 2-4) in one donor. Minor anesthetic complications were shoulder pain, pruritus and urinary retention related to epidural morphine, and major morbidity included central venous catheter-induced thrombosis of the brachial and subclavian vein, neuropraxia, foot drop and prolonged postdural puncture headache. One of 113 donors died from pulmonary embolism on the 11th postoperative day. This procedure has some major risks related to anesthesia and surgery. Although careful attention will lower complication rate, we have to keep in mind that the risks of donor surgery will not be completely eliminated.
- Published
- 2008
47. Active tuberculosis prevalence and characteristics of tuberculosis patients in liver transplant patients
- Author
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Aylin Ozgen Alpaydin, Selver Seda Salman, Tarkan Unek, Mucahit Ozbilgin, Tufan Egeli, Oguz Kilinc, Vildan Avkan-Oguz, and Madina Abdulleyeva
- Subjects
medicine.medical_specialty ,Tuberculosis ,business.industry ,Tuberculin ,bacterial infections and mycoses ,medicine.disease ,Active tuberculosis ,Surgery ,QuantiFERON ,Active tb ,Internal medicine ,Chemoprophylaxis ,medicine ,Transplant patient ,Risk factor ,business - Abstract
Aim: Tuberculosis risk has been defined to increase in liver transplant(LT) recipients. This is especially important in high endemic areas, like Turkey. We aimed to investigate the prevalence of TB and evaluate the clinical characteristics of TB patients in LT recipients. Methods: All patients who underwent LT between January 2004 and December 2013 and whose data was accessible were included in the study. Demographic features, previous TB history, clinical and radiological findings, Tuberculin skin test (TST) results and TB occurrence of the candidates were evaluated. Results: Four hundred-three patients had LT by this time. Mean age was 47.27±11.04; 280 (69.47%) were males. Mean MELD score was 16.30±6.54. Previous TB history, contact with an active TB patient and smoking were asked to 214 (53.10%), 211 (52.35%) and 212(52.61%) of the patients respectively. TST was administered to 108(25,91%) and Quantiferon TB test to 1 of them. TST positivity was determined in 28(25.93%), median TST values were found 7 (min0-max25) mm. Chemoprophylaxis was not recommended to any of LT candidates. In the postransplant period 5 patients (1.24%) developed TB over a median duration of 14 (min7-max84) months. Conclusion: TB prevalence of LT recipients of our center is similar with the current literature. In the early post transplant period it was difficult to handle TB treatment of our patients. LTBI screening including risk factor assessment, TST/ Quantiferon TB testing, and regular recording and follow-up should be considered in the management of transplant recipients.
- Published
- 2015
48. Acute Renal Injury Evaluation After Liver Transplantation: With RIFLE Criteria
- Author
-
H. Aksu Erdost, Elvan Öçmen, Mucahit Ozbilgin, Vildan Avkan-Oguz, R. Meseri Dalak, Leyla Iyilikci, Mert Akan, Sevda Özkardeşler, Ibrahim Astarcioglu, and Tarkan Unek
- Subjects
Male ,medicine.medical_specialty ,Turkey ,medicine.medical_treatment ,Liver transplantation ,Gastroenterology ,Liver disease ,Risk Factors ,Internal medicine ,medicine ,Odds Ratio ,Humans ,Rifle ,Retrospective Studies ,Transplantation ,business.industry ,Incidence ,Retrospective cohort study ,Odds ratio ,Perioperative ,Acute Kidney Injury ,Middle Aged ,medicine.disease ,Surgery ,Liver Transplantation ,Kidney Failure, Chronic ,Female ,business ,Kidney disease - Abstract
Background The aim of this study was to identify acute renal injury (ARI) through the use of RIFLE (risk, injury, failure, loss, end-stage kidney disease) criteria and to investigate perioperative risk factors for ARI in liver transplantation (LT). Methods We reviewed medical records of adult LT patients retrospectively. Postoperative ARI was staged with RIFLE criteria by the 1st and 7th days of the surgery. Results We analyzed 440 adult LT patients, categorized as risk (R), injury (I), or failure (F) according to the RIFLE criteria. In this study, in the first postoperative day, incidence of ARI was 7.95%; all of them were R-class, and, on the 7th day, the incidence of ARI was 7.27%, as R-class 6.59% and I-class 0.68%. Significant risk factors were detected within the first postoperative day including pre-operative hemoglobin levels P = .019), intra-operative transfusion of red blood cells (RBCs) ( P = .049) and fresh-frozen plasma (FFP) ( P = .049), blood loss ( P = .011), and post-reperfusion syndrome ( P = .023). Multivariate analysis revealed risk factors for ARI as RBCs (odds ratio [OR], 1.049; P = .247) and FFP (OR, 1.017; P = .627) transfusion and blood loss (OR, 1.000; P = .021) (blood loss OR: 0.9996952300184; 95% confidence interval: 0.9994356774026 to 0.999548500399). The only significant risk factor for the 7th postoperative day was the Model for End-Stage Liver Disease (MELD) score (>20) ( P = .002). Conclusions This study showed that RBC and FFP transfusion, perioperative blood loss, and MELD score >20 are risk factors for LT-related ARI. Also normalization of hemoglobin levels with non-blood products in patients with preoperative low hemoglobin levels can diminish the need for RBC and that can prevent ARI.
- Published
- 2015
49. The efficacy and safety of tenofovir in the prevention of hepatitis B virus recurrence following liver transplantation
- Author
-
Mesut Akarsu, Tarkan Unek, Ibrahim Astarcioglu, Sedat Karademir, and Gozde Dervis Hakim
- Subjects
Male ,medicine.medical_specialty ,medicine.medical_treatment ,Organophosphonates ,Renal function ,Immunoglobulins ,Liver transplantation ,medicine.disease_cause ,Gastroenterology ,Antiviral Agents ,Organ transplantation ,End Stage Liver Disease ,chemistry.chemical_compound ,Postoperative Complications ,Recurrence ,Internal medicine ,medicine ,Humans ,Tenofovir ,Retrospective Studies ,Hepatitis B virus ,Hepatitis ,Creatinine ,business.industry ,Adenine ,Lamivudine ,Middle Aged ,medicine.disease ,Hepatitis B ,Surgery ,Liver Transplantation ,Regimen ,Treatment Outcome ,chemistry ,Female ,business ,medicine.drug - Abstract
Background/Aims: In this study, a tenofovir disoproxil fumarate (TDF) + hepatitis B immunoglobulin (HBIG) regimen was compared with lamivudine (LAM) + HBIG to determine the efficacy and safety of TDF in the prevention of hepatitis B virus (HBV) recurrence following liver transplantation (LT). Materials and Methods: Thirty-six patients, 18 treated with TDF+HBIG (TDF group) and 18 with LAM+HBIG (LAM group), were evaluated retrospectively over a median 36-month follow-up in the Liver Transplantation Outpatient Unit of Dokuz Eylul University after having an LT. In the TDF group, TDF treatment was initiated in six patients due to resistance to LAM, in one patient due to relapse, in three patients to prevent relapse, and in eight patients due to de novo hepatitis. In the LAM group, LAM therapy was initiated in two patients due to de novo hepatitis and in 16 patients to prevent relapse. Results: In the TDF group, an increase of greater than 0.5 mg/dL in creatinine values was observed in two patients. In the LAM group, creatinine values did not increase to greater than 0.5 mg/dL. No cases of acute renal failure associated with TDF or LAM, mild or serious adverse events, or HBV recurrence were observed among the patients. Glomerular filtration rates (GFRs) of these patients were calculated with a modification of renal disease (MDRD) formulation. There was no significant difference (p
- Published
- 2015
50. Adulthood hepatoblastoma
- Author
-
Tulay Akman, Mehmet Asi Oktan, Ilkay Tugba Unek, Tarkan Unek, Ilhan Oztop, Tugba Yavuzsen, Ahmet Ugur Yilmaz, and Ozgul Sagol
- Subjects
Gastroenterology - Published
- 2015
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