39 results on '"T. Unek"'
Search Results
2. Oligo Metastatic Pancreas Cancer and Surgery
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O. Unalp, M. Ozbilgin, Ahmet Coker, and T. Unek
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Oncology ,medicine.medical_specialty ,medicine.anatomical_structure ,Hepatology ,business.industry ,Internal medicine ,Gastroenterology ,medicine ,Cancer ,Pancreas ,business ,medicine.disease - Published
- 2021
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3. 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
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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.
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- 2018
4. One Center Experience in Hilar Cholangiocarcinomas
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Anıl Aysal, T. Unek, Funda Obuz, Cihan Agalar, Mucahit Ozbilgin, Mesut Akarsu, Tufan Egeli, Ozgul Sagol, Ibrahim Astarcioglu, and A. Gulcu
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medicine.medical_specialty ,Hepatology ,business.industry ,Gastroenterology ,Medicine ,Center (algebra and category theory) ,Radiology ,Hilar Cholangiocarcinomas ,business - Published
- 2016
5. Biliary complications after liver transplantation
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S. Karademir, T. Unek, A. Gulcu, A. Bacakoglu, Mucahit Ozbilgin, Mesut Akarsu, Tufan Egeli, and Ibrahim Astarcioglu
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medicine.medical_specialty ,Hepatology ,business.industry ,medicine.medical_treatment ,Gastroenterology ,Medicine ,Liver transplantation ,business ,Surgery - Published
- 2016
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6. Results of observational study to determine K-ras mutation rates in 2458 patients with metastatic colorectal cancer in Turkey (TURKRAS Study)
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Suleyman Buyukberber, T. Unek, Abdurrahman Isikdogan, Bülent Orhan, Hakan Harputluoglu, Mahmut Gumus, Oktay Tarhan, Ridvan Seckin Ozen, Berna Oksuzoglu, Faysal Dane, Kazim Uygun, Kerem Okutur, Idris Yucel, Kübra Aydın, Sinan Yavuz, Nurullah Zengin, Bulent Karabulut, and Ondokuz Mayıs Üniversitesi
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Gumus M., Dane F., Karabulut B., Uygun K., Aydin K., Orhan B., Oksuzoglu B., Tarhan O., Buyukberber S., Okutur K., et al., -Results of observational study to determine K-ras mutation rates in 2458 patients with metastatic colorectal cancer in Turkey (TURKRAS Study).-, Annual Meeting of the American-Society-of-Clinical-Oncology (ASCO) / Clinical Science Symposium on Predicting and Improving Adverse Outcomes in Older Adults with Cancer, Illinois, Amerika Birleşik Devletleri, 29 Mayıs - 02 Haziran 2015, cilt.33 ,Oncology ,Cancer Research ,medicine.medical_specialty ,Colorectal cancer ,business.industry ,education ,medicine.disease ,Internal medicine ,Mutation (genetic algorithm) ,RAS Mutation ,medicine ,Observational study ,business - Abstract
Annual Meeting of the American-Society-of-Clinical-Oncology (ASCO) / Clinical Science Symposium on Predicting and Improving Adverse Outcomes in Older Adults with Cancer -- MAY 29-JUN 02, 2015 -- Chicago, IL WOS: 000358036902641 … Amer Soc Clin Oncol
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- 2015
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7. The Effects of Different Pressure Pneumoperitoneum on the Pulmonary Mechanics and Surgical Satisfaction in the Laparoscopic Cholecystectomy
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B. Küçüköztaş, L. İyilikçi, S. Ozbilgin, M. Ozbilgin, T. Ünek, and H. Ellidokuz
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laparoscopic cholecystectomy ,pneumoperitoneum ,surgical vision ,surgery satisfaction ,low pressure ,deep neuromuscular blockage ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Objectives. Inspiratory, hemodynamic and metabolic changes occur in laparoscopic surgery depending on pneumoperitoneum and patient position. This study aims to evaluate the effects of intra-abdominal pressure increase based on CO2 pneumoperitoneum in laparoscopic operations on hemodynamic parameters and respiratory dynamics and satisfaction of surgeon and operative view.Materials and Methods. A total of 116 consecutive, prospective, ASA class I–III cases aged 18–70 years undergoing laparoscopic cholecystectomy were enrolled in this study. Data of 104 patients were analysed. Patients were divided into two groups as the group Low Pressure (13 mmHg) (Group SP) (n=51). In this study administration of general anesthesia used total intravenous anaesthesia in both groups. All groups had standard and TOF monitorization applied. The anaesthesia methods used in both groups were recorded. Before, during and after peritoneal insufflation, the peroperative ventilation parameters and hemodynamic parameters were recorded. The adequacy of pneumoperitoneum, gastric and the operative view were evaluated by the operating surgeon and recorded.Results. The peripheral oxygen saturation showed no significant difference between the low and standard pressure pneumoperitoneum in view of tidal volume, respiratory rate, end tidal CO2, mean and peak inspiratory pressure, and minute ventilation values. In terms of hemodynamics, when values just after intubation and before extubation were compared, it was observed that in the LP group systolic, diastolic and mean blood pressure values were higher. In terms of heart rate, no significant difference was observed in determined periods between groups. There was no significant difference between the groups in terms of surgical satisfaction and vision.Conclusion. Low pressure pneumoperitoneum provides effective respiratory mechanics and stable hemodynamics for laparoscopic cholecystectomy. It also provides the surgeon with sufficient space for hand manipulations. Anaesthetic method, TIVA and neuromuscular blockage provided good surgery vision with low pressure pneumoperitoneum.
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- 2021
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8. Large Cell Neuroendocrine Carcinoma of the Ovary and Its Skin Metastases: A Case Report and Review of the Literature
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S, Cokmert, L, Demir, L, Doganay, N, Demir, K, Kocacelebi, I T, Unek, E, Gezer, K, Kilic, and M, Alakavuklar
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integumentary system ,Case Report - Abstract
Large cell neuroendocrine carcinoma in the gynaecological organs affects the uterine cervix and ovary. Large cell neuroendocrine carcinoma of the ovary is extremely rare, and prognosis is quite poor even when diagnosed at an early stage. These tumours respond poorly to standard chemotherapy regimens. The clinical observation of skin metastasis in patients with epithelial ovarian cancer is relatively uncommon, occurring in only 3.5% of patients. These lesions are observed mostly in skin of the abdominal wall adjacent to the primary ovarian tumours. Metastatic skin lesions on extremities are much more rare; it is reported that only 12% of epithelial ovarian carcinoma skin metastases occur on the limbs. Skin metastasis due to large cell neuroendocrine carcinoma of the ovary has not been previously reported. We report the case of a large cell neuroendocrine tumour of the ovary with skin metastases on extremities appearing two months after surgery in a 68-year old woman.
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- 2014
9. Malign Recurrence of Primary Chest Wall Hemangiopericytoma in the Lung after Four Years: A Case Report and Review of the Literature
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Ahmet Alacacioglu, T. Unek, Ahmet Ugur Yilmaz, Duygu Gürel, Ahmet Önen, Devrim Dolek, and Tulay Akman
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Hemangiopericytoma ,medicine.medical_specialty ,Pathology ,Lung ,Focal area ,business.industry ,Endothelial tissue ,Lung metastasis ,Case Report ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,medicine.disease ,lcsh:RC254-282 ,Primary tumor ,medicine.anatomical_structure ,Oncology ,medicine ,Right humerus ,Radiology ,business ,Pathological - Abstract
Hemangiopericytoma (HPC) may develop in every site where the endothelial tissue exits and primarily develops in the skeletal-muscular system or the skin. Adult cases of HPC generally exhibit a benign course. 20–30% of the cases may show a malign course. The tumors that show more than four mitoses, a focal area of necrosis, and increased cellularity on a magnification ×10 are considered as malign. In our paper, we presented our case who showed a lung metastasis at the end of 4 years and who developed a pathological fracture of the right humerus at the end of approximately 2 years, because hemangiopericytoma is rarely seen in the chest wall as a primary tumor.
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- 2014
10. Pregnancy and delivery after liver transplantation: presentation of 12 cases
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Mucahit Ozbilgin, Ibrahim Astarcioglu, Mesut Akarsu, Tufan Egeli, Sevda Özkardeşler, T. Unek, B. Saatli, and A. Bacakoglu
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Pregnancy ,Pediatrics ,medicine.medical_specialty ,Hepatology ,business.industry ,medicine.medical_treatment ,Gastroenterology ,Liver transplantation ,medicine.disease ,surgical procedures, operative ,Immunology ,medicine ,Presentation (obstetrics) ,business - Published
- 2016
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11. Hypoglycemia induced by long-acting somatostatin analogues in a patient with nonfunctional neuroendocrine tumor
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I T, Unek, A, Celtik, S, Yener, T, Yavuzsen, A, Alacacioglu, S, Cokmert, I, Oztop, B, Demirkan, O, Dicle, O, Sagol, R, Bekis, and U, Yilmaz
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Blood Glucose ,Antineoplastic Agents, Hormonal ,Middle Aged ,Octreotide ,Immunohistochemistry ,Methylprednisolone ,Hypoglycemia ,Pancreatic Neoplasms ,Neuroendocrine Tumors ,Fatal Outcome ,Glucose ,Delayed-Action Preparations ,Dietary Carbohydrates ,Humans ,Female ,Infusions, Intravenous ,Radionuclide Imaging ,Somatostatin ,Tomography, X-Ray Computed ,Glucocorticoids - Abstract
Somatostatin and its long-acting analogues are effective in symptom control in patients with functional neuroendocrine tumors; they are also able to control tumor growth. Somatostatin analogues are safe and generally well tolerated. In some cases they may cause serious complications. Somatostatin analogues are potent inhibitors of growth hormone (GH) and glucagon secretion. They cause impairment of hepatic glucose output and delay in intestinal absorption of carbohydrates. Patients with huge tumor mass and multiple liver metastases have increased risk of tumor-induced hypoglycemia. In these patients, long-acting octreotide may trigger serious hypoglycemia. The patients whose glucose control is dependent on counter-regulatory hormones should be monitored for the possibility of hypoglycemia. Herein, we present a patient with severe and prolonged hypoglycemia after long-acting octreotide treatment.
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- 2009
12. Synchronous appearance of male breast cancer and pancreatic cancer 15 years after the diagnosis of testicular cancer--report of a case
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I T, Unek, A, Alacacioglu, O, Tarhan, A I, Sevinc, I, Oztop, O, Sagol, T, Canda, F, Obuz, P, Balci, and U, Yilmaz
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Male ,Neoplasms, Multiple Primary ,Pancreatic Neoplasms ,Fatal Outcome ,Testicular Neoplasms ,Positron-Emission Tomography ,Carcinoma, Ductal, Breast ,Humans ,Middle Aged ,Breast Neoplasms, Male ,Neoplasm Staging - Abstract
The frequency of new neoplastic diseases among patients cured of testicular cancer is higher than in normal population. For these patients, synchronous occurrence of multiple neoplasms is not common. Also, less than 1% of all cases of breast cancer occur in males. We present herein a case having both breast and concurrent pancreatic cancer after being effectively treated for testicular cancer. To the best of our knowledge, this is the first case of synchronous breast and pancreatic cancer in a male patient following testicular cancer. Second cancer is the most severe long-term complication of chemotherapy or radiotherapy for patients with testicular cancer and the possibility of multiple cancers has to be taken into consideration when multiple lesions are present.
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- 2008
13. Epidemiology and survival of hepatocellular carcinoma in Turkey: outcome of multicenter study
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Oktay Tarhan, Necati Alkis, Isil Somali, Ilkay Simsek, Ibrahim Astarcioglu, Metin Ozkan, Cemalettin Camci, Ahmet Alacacioglu, T. Unek, Aziz Karaoglu, and Ugur Yilmaz
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Adult ,Liver Cirrhosis ,Male ,Cancer Research ,Turkish population ,medicine.medical_specialty ,Hepatitis B virus ,Carcinoma, Hepatocellular ,Adolescent ,Turkey ,Hepatitis C virus ,Hepacivirus ,medicine.disease_cause ,Gastroenterology ,Hepatitis B, Chronic ,Risk Factors ,Internal medicine ,medicine ,Carcinoma ,Biomarkers, Tumor ,Humans ,Radiology, Nuclear Medicine and imaging ,Survival rate ,neoplasms ,Aged ,Neoplasm Staging ,business.industry ,Incidence ,Liver Neoplasms ,General Medicine ,Hepatitis C ,Hepatitis B ,Hepatitis C, Chronic ,Middle Aged ,medicine.disease ,Prognosis ,digestive system diseases ,Survival Rate ,Oncology ,Hepatocellular carcinoma ,Female ,alpha-Fetoproteins ,business ,Follow-Up Studies - Abstract
Objective: Hepatocellular cancer (HCC) is one of the important health problems in Turkey. We aimed to determine the clinical and demographic features of HCC in the Turkish population and to evaluate the prognostic and survival features. Method: Two hundred and twenty-one patients with HCC from five hospitals in Turkey are included in this study. Results: In 44.4% of the 221 patients with hepatitis B virus and in 21.3% of the 221 patients with hepatitis C virus were found to be responsible for HCC etiology. It has been shown that HCC developed on cirrhosis basis in 74.2% of the patients. HCC was presented with single solitary nodule in 69.2% of the patients. Non-liver metastasis was present in 12.5% of the patients. In 21.7% of the patients, a-fetoprotein (AFP) levels were above the diagnostics level of 400 ng/ml. The median overall survival (OS) of 221 patients was 14 months. The median OS of the patients with Child-Pugh A class was significantly longer than that with Child-Pugh B and C classes. The OS of the individuals with normal AFP levels was also longer than that with high AFP levels. The OS of the patients with Stage I HCC according to tumor node metastasis (TNM) classification, the female patients and the treated patients group was found to be significantly good. Conclusions: In conclusion, the viral etiology (hepatitis B and C infections) in Turkish population is found to be an important factor in HCC development. The Child-Pugh classification, AFP levels, TNM classification, being female and treatment were determined to be important prognostic factors in HCC patients.
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- 2008
14. Author Index for Abstracts
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Shinjiro Sasaki, A. López-Soto, M. Hartmann, H. Horimoto, Tohru Tani, Takanori Yoshida, Z. Tokgoz, Toshio Bandoh, K. Jönsson, M. Hacıyanlı, A. González-Quintela, Evita Zoucas, Kazuyoshi Hanasawa, T. Unek, Ingmar Lundquist, L.F. Pérez, Barbara Jedlinska, Carina Nilsson, Tsuyoshi Mori, Ingemar Ihse, S. Mieno, S. López-Ben, K. Ninomiya, B. Dolgor, M. Kodama, J. Llovo, E. Otero-Antón, Yasunari Nakai, M. Fuzun, Seigo Kitano, T. Matsumoto, and Å. Mellström
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medicine.medical_specialty ,Index (economics) ,Nephrology ,business.industry ,Ophthalmology ,Statistics ,Optometry ,Medicine ,Surgery ,Hematology ,General Medicine ,business - Published
- 2003
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15. Inflammation-Associated Long Non-Coding RNAs (lncRNAs) in Chronic Viral Hepatitis- Associated Hepatocellular Carcinoma.
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Pehlivanoglu B, Aysal A, Agalar C, Egeli T, Ozbilgin M, Unek T, Unek IT, Oztop I, Aktas S, and Sagol O
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Objective: This study aimed to identify the expression profile and prognostic significance of inflammation-associated lncRNAs in chronic viral hepatitis (CVH) and CVH-associated hepatocellular carcinoma (CVH-HCC)., Material and Methods: In the first step, lncRNA expression analysis was performed by real-time polymerase chain reaction (RT-PCR) using an array panel of 84 inflammation-associated lncRNAs in 48 formalin-fixed paraffin-embedded (FFPE) tissue samples (12 CVH-HCC, 12 peritumoral cirrhotic parenchyma, 12 nontumoral cirrhotic CVH parenchyma, 12 normal liver samples). In the second step, 7 lncRNAs (DLEU2, HOTAIR, LINC00635, LINC00662, RP11-549J18.1, SNHG16 and XIST) were chosen for RT-PCR assay testing in 72 samples (24 CVH-HCC, 24 peritumoral cirrhotic parenchyma, 24 nontumoral cirrhotic CVH parenchyma samples)., Results: Fifty-six inflammation-associated lncRNAs were significantly up-regulated in the peritumoral cirrhotic parenchyma compared to the normal liver. Expression of 71 lncRNAs was significantly higher in peritumoral cirrhotic parenchyma compared to cirrhotic CVH parenchyma. DLEU2 and SNHG16 were up-regulated both in the tumor and peritumoral cirrhotic parenchyma compared to cirrhotic CVH parenchyma. Expression of LINC00662 was significantly higher in CVH-HCC than in cirrhotic CVH parenchyma. Expression of XIST was also increased in both tumor and peritumoral parenchyma samples, albeit without statistical significance. No significant association was found between lncRNA expressions and survival., Conclusion: Inflammation-associated lncRNAs DLEU2, SNHG16, LINC00662, and XIST are candidate diagnostic biomarkers in CVH-HCC. More evidence is needed to prove their utility as prognostic markers.
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- 2024
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16. Health Locus of Control and Physical Activity in Liver Transplant Recipients.
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Yıldırım M, Aktar B, Bozkurt HN, Egeli T, and Unek T
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Introduction: Health locus of control has the potential to influence health behavior among individuals with chronic diseases. However, little is known regarding the relationship between locus of control and physical activity in transplant recipients. The aim of the study was to investigate health locus of control and physical activity in liver transplant recipients., Methods: Seventy-six liver transplant recipients were enrolled. The Multidimensional Health Locus of Control - Form C, including internal, chance, doctors, and powerful others subdimensions, was used to evaluate the health locus of control. Physical activity was assessed with the International Physical Activity Questionnaire - Short Form., Results: The median internal health locus of control score was 28.54. Thirty-six participants had low, 35 participants had moderate, and five participants had high physical activity. Internal health locus of control was higher in patients having moderate activity compared to patients with low activity (p=0.04). "Doctors" subdimension of health locus of control was negatively correlated with walking (r=-0.38, p=0.02) and total activity scores among patients with low activity (r=-0.37, p=0.02)., Conclusion: Liver transplant recipients with moderate activity present higher internal health locus of control scores, suggesting a possible influence of physically active behavior on the beliefs of one's own control over disease management. As the activity level increases, the belief that health outcomes are largely the responsibility of health professionals decreases among liver transplant recipients with low activity. Promoting physical activity will help develop the control of one's own actions on health after liver transplantation., Competing Interests: Human subjects: Consent was obtained or waived by all participants in this study. Institutional Non-invasive Research Ethics Board, Dokuz Eylul University issued approval 2019/18-23. The study was conducted in accordance with the ethical standards of the Helsinki Declaration and was approved by the Institutional Non-invasive Research Ethics Board (Protocol number: 4839-GOA, Approval number: 2019/18-23). All subjects gave written consent to participate in the study after receiving appropriate verbal and written information. Animal subjects: All authors have confirmed that this study did not involve animal subjects or tissue. Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other relationships: All authors have declared that there are no other relationships or activities that could appear to have influenced the submitted work., (Copyright © 2024, Yıldırım et al.)
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- 2024
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17. lncRNA XIST Interacts with Regulatory T Cells within the Tumor Microenvironment in Chronic Hepatitis B-Associated Hepatocellular Carcinoma.
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Pehlivanoglu B, Aysal A, Agalar C, Egeli T, Ozbilgin M, Unek T, Unek IT, Oztop I, Aktas S, and Sagol O
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- Humans, Male, Middle Aged, Female, Adult, Aged, RNA, Long Noncoding genetics, Tumor Microenvironment immunology, Carcinoma, Hepatocellular pathology, Carcinoma, Hepatocellular genetics, Carcinoma, Hepatocellular virology, Carcinoma, Hepatocellular immunology, Liver Neoplasms pathology, Liver Neoplasms genetics, Liver Neoplasms virology, Liver Neoplasms immunology, Hepatitis B, Chronic pathology, Hepatitis B, Chronic complications, Hepatitis B, Chronic genetics, T-Lymphocytes, Regulatory immunology
- 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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18. Vascular Complications After Liver Transplantation.
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Astarcıoglu I, Egeli T, Gulcu A, Ozbilgin M, Agalar C, Cesmeli EB, Kaya E, Karademir S, and Unek T
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- Adult, Child, Humans, Male, Female, Adolescent, Living Donors, Hepatic Artery surgery, Portal Vein diagnostic imaging, Treatment Outcome, Retrospective Studies, Postoperative Complications etiology, Postoperative Complications therapy, Postoperative Complications epidemiology, Liver Transplantation, Thrombosis etiology
- Abstract
Objectives: Vascular complications after liver transplant 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 aftertreatment.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 complications 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 surgicaltreatment. Two patients underwent immediate retransplant due to hepatic artery thrombosis., Conclusions: Because vascular complications are the most severe complications afterlivertransplant,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.
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- 2023
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19. The Site of Lymph Node Metastasis: A Significant Prognostic Factor in Pancreatic Ductal Adenocarcinoma.
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Aysal A, Agalar C, Cagaptay S, Safak T, Egeli T, Ozbilgin M, Unek T, Unek T, and Sagol O
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- Humans, Lymph Node Excision, Lymph Nodes pathology, Lymphatic Metastasis pathology, Neoplasm Staging, Prognosis, Retrospective Studies, Carcinoma, Pancreatic Ductal pathology, Pancreatic Neoplasms pathology
- 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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20. Comparison of Resection and Liver Transplant in Treatment of Hepatocellular Carcinoma.
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Aksoy SO, Unek T, Sevinc Aİ, Arslan B, Sirin H, Derici ZS, Ellidokuz H, Sagol O, Agalar C, and Astarcıoglu İ
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- Carcinoma, Hepatocellular mortality, Carcinoma, Hepatocellular pathology, Clinical Decision-Making, Disease-Free Survival, Female, Humans, Length of Stay, Liver Neoplasms mortality, Liver Neoplasms pathology, Male, Middle Aged, Neoplasm Recurrence, Local, Neoplasm Staging, Postoperative Complications etiology, Progression-Free Survival, Retrospective Studies, Risk Assessment, Risk Factors, Time Factors, Carcinoma, Hepatocellular surgery, Hepatectomy adverse effects, Hepatectomy mortality, Liver Neoplasms surgery, Liver Transplantation adverse effects, Liver Transplantation mortality
- 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.
- Published
- 2020
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21. Analysis of Causes and Risk Factors for Late Mortality After Liver Transplant: How Can We Obtain Better Long-Term Survival?
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Egeli T, Unek T, Ağalar C, Derici S, Ozbilgin M, Akarasu M, Bacakoglu A, Ellidokuz H, and Astarcıoglu I
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- Adolescent, Adult, Age Factors, Aged, Cause of Death, Female, Humans, Liver Transplantation adverse effects, Male, Middle Aged, Retrospective Studies, Risk Assessment, Risk Factors, Time Factors, Treatment Outcome, Young Adult, Liver Transplantation mortality, Postoperative Complications mortality
- 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
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22. Analysis of socioeconomic status and other factors affecting patient-graft survival in patients undergoing liver transplantation.
- Author
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Onder AH, Bengi G, Ozbilgin M, Unek T, Astarcioglu I, and Akarsu M
- Abstract
Background and Aim: Liver transplantation is performed in increasing numbers due to advances in surgical techniques and the introduction of diverse immunosuppressive drugs. The present study aims to analyze the effects of socioeconomic status and education level on patient and graft survival, in addition to all these factors., Material and Methods: All patients aged 18 years and above who underwent consecutive liver transplantation at the Liver Transplantation Unit of Department of General Surgery at the Dokuz Eylül University Hospital and whose data were available were included in this study., Results: Incompliance was noted in 68.3% of the 278 patients. On the other hand, patient compliance did not have a significant effect on graft and patient survival. However, decreased levels in the parameters, such as education status, vocational status and socioeconomic status, were found to be correlated with patient compliance. A significant correlation was not found between these factors and patient and graft survival., Conclusion: Although a direct effect of socioeconomic status on patient and graft survival could not be shown the significant association of vocational status and education status which determine socioeconomic level with parameters other than patient and graft survival may affect the success of liver transplants., Competing Interests: The authors have no conflict of interest to declare., (© Copyright 2020 by Hepatology Forum.)
- Published
- 2020
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23. The Role of Log Odds of Positive Lymph Nodes in Predicting the Survival after Resection for Ampullary Adenocarcinoma.
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Agalar C, Aysal A, Unek T, Egeli T, Ozbilgin M, Akturk N, Semiz HS, Unek T, Akarsu M, Soyturk M, Ellidokuz H, Sagol O, and Astarcioglu I
- Subjects
- Adult, Aged, Carcinoma, Pancreatic Ductal mortality, Female, Humans, Male, Middle Aged, Neoplasm Staging methods, Odds Ratio, Pancreatic Neoplasms mortality, Prognosis, Survival Rate, Ampulla of Vater pathology, Carcinoma, Pancreatic Ductal pathology, Lymphatic Metastasis pathology, Pancreatic Neoplasms pathology
- 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≤ - 1.5), LODDS2(-1.5 < LODDS≤ - 1.0), LODDS3(-1.0 < LODDS≤ - 0.5), LODDS4(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
- 2020
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24. De Novo Malignancies After Liver Transplantation: A Single Institution Experience.
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Egeli T, Unek T, Ozbilgin M, Agalar C, Derici S, Akarsu M, Unek IT, Aysin M, Bacakoglu A, and Astarcıoglu I
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- Aged, Female, Humans, Immunosuppressive Agents administration & dosage, Immunosuppressive Agents adverse effects, Incidence, Liver Transplantation mortality, Male, Middle Aged, Neoplasms diagnosis, Neoplasms mortality, Neoplasms therapy, Retrospective Studies, Risk Factors, Time Factors, Treatment Outcome, Turkey epidemiology, Liver Transplantation adverse effects, Neoplasms epidemiology
- 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
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25. Liver Transplant in Patients with Primary Sclerosing Cholangitis: Long-Term Experience of a Single Center.
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Astarcioglu I, Egeli T, Unek T, Akarsu M, Sagol O, Obuz F, Ozbilgin M, Aysal Agalar A, and Ağalar C
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- Adult, Biopsy, Cholangiopancreatography, Magnetic Resonance, Cholangitis, Sclerosing diagnosis, Cholangitis, Sclerosing mortality, End Stage Liver Disease diagnosis, End Stage Liver Disease mortality, Female, Humans, Male, Middle Aged, Postoperative Complications etiology, Recurrence, Retrospective Studies, Risk Factors, Time Factors, Treatment Outcome, Turkey, Young Adult, Cholangitis, Sclerosing surgery, End Stage Liver Disease surgery, Liver Transplantation adverse effects, Liver Transplantation mortality
- Abstract
Objectives: Primary sclerosing cholangitis is a chronic inflammatory disease of the intrahepatic and extrahepatic bile ducts. More than half of the patients will face end-stage liver disease and require liver transplant. Here, we describe the long-term outcomes of liver transplant in patients with primary sclerosing cholangitis at our center., Materials and Methods: For this retrospective, observational study, we investigated all patients who underwent liver transplant for primary sclerosing cholangitis between January 2005 and June 2013 at the Dokuz Eylul University Hospital. Patient data were obtained from hospital records. Our inclusion criteria were patients over 18 years old and diagnosed with primary sclerosing cholangitis., Results: Of 11 patients included the study, 6 (54.5%) were male and 5 (45.5%) were female. Mean age was 40.6 ± 11.0 years (range, 23-60 y). All patients had cirrhosis due to primary sclerosing cholangitis. With regard to Child-Turcot-Pugh classification, 2 patients (18.2%) were classified as having Child-Turcot-Pugh A cirrhosis, 7 patients (63.6%) were classified as having B cirrhosis, and 2 patients (18.2%) were classified as having C cirrhosis. Mean Modified End-Stage Liver Disease score was 17.5 ± 6.1 (range, 7-25). Cholangiocarcinoma was not detected in explant pathologic examinations. Primary sclerosing cholangitis recurrence developed in 2 patients (18.1%). Three patients (27.2%) died during the follow-up period., Conclusions: Liver transplant is a good therapeutic option for primary sclerosing cholangitis with satisfactory long-term outcomes. Liver transplant should be reserved for patients with end-stage liver disease and other conditions that significantly impair quality of life.
- Published
- 2018
26. En Bloc Pancreaticoduodenectomy for Locally Advanced Right Colon Cancers.
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Ağalar C, Canda AE, Unek T, and Sokmen S
- Subjects
- Aged, Duodenum pathology, Duodenum surgery, Female, Humans, Male, Middle Aged, Neoplasm Invasiveness, Pancreas pathology, Pancreas surgery, Retrospective Studies, Adenocarcinoma pathology, Adenocarcinoma surgery, Colectomy, Colonic Neoplasms pathology, Colonic Neoplasms surgery, Pancreaticoduodenectomy methods
- 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
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27. A Novel Technique for Managing Pancreaticojejunal Anastomotic Leak after Pancreaticoduodenectomy.
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Egeli T, Unek T, Ozbilgin M, Goztok M, and Astarcıoglu I
- 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
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28. Adulthood hepatoblastoma.
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Akman T, Oktan MA, Unek İT, Unek T, Öztop İ, Yavuzsen T, Yılmaz AU, and Sağol Ö
- Subjects
- Adolescent, Female, Humans, Hepatoblastoma diagnosis, Hepatoblastoma therapy, Liver Neoplasms diagnosis, Liver Neoplasms therapy
- Published
- 2015
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29. The efficacy and safety of tenofovir in the prevention of hepatitis B virus recurrence following liver transplantation.
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Hakim GD, Akarsu M, Karademir S, Unek T, and Astarcıoğlu İ
- Subjects
- Adenine adverse effects, Adenine therapeutic use, Antiviral Agents adverse effects, Female, Humans, Male, Middle Aged, Organophosphonates adverse effects, Recurrence, Retrospective Studies, Tenofovir, Treatment Outcome, Adenine analogs & derivatives, Antiviral Agents therapeutic use, End Stage Liver Disease surgery, Hepatitis B prevention & control, Immunoglobulins therapeutic use, Liver Transplantation, Organophosphonates therapeutic use, Postoperative Complications prevention & control
- 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 Eylül 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<0.05) in the GFRs between the two groups., Conclusion: The results of this study, after a 36-month follow-up period, were encouraging and demonstrated that TDF therapy is safe and efficacious in treating HBV-positive organ transplant patients. However, patients should be monitored carefully in terms of renal function. Given the limited experience with TDR in LT, this study is of importance due to its long follow-up period.
- Published
- 2014
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30. Monitoring the BK virus in liver transplant recipients: a prospective observational study.
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Demir-Onder K, Avkan-Oguz V, Unek T, Sarioglu S, Sagol O, and Astarcioglu I
- Subjects
- Adult, Aged, BK Virus genetics, DNA, Viral isolation & purification, Female, Graft Rejection diagnosis, Graft Rejection virology, Graft Survival, Humans, Male, Middle Aged, Polyomavirus Infections diagnosis, Polyomavirus Infections urine, Predictive Value of Tests, Prospective Studies, Real-Time Polymerase Chain Reaction, Risk Factors, Time Factors, Treatment Outcome, Tumor Virus Infections diagnosis, Tumor Virus Infections urine, Urinalysis, Urine cytology, Viral Load, Viremia diagnosis, Viremia virology, Young Adult, BK Virus isolation & purification, Liver Transplantation adverse effects, Polyomavirus Infections virology, Tumor Virus Infections virology
- Abstract
Objectives: Because of the controversy regarding the effects of BK virus on nonrenal solid-organ transplant, we detected the BK virus via different methods and its effect on clinical findings, liver and kidney functions, and graft dysfunction in liver transplant recipients., Materials and Methods: This prospective cohort study comprised patients over the age of 18, who consecutively received liver transplant from January 1 to December 31, 2011. The patients were examined once, every 2 weeks, for the first 3 months after transplant. Clinical findings were evaluated on each examination; blood and urine samples were collected, BK virus DNA was assessed with real-time polymerase chain reaction, and the presence of decoy cells (which are epithelial cells with large nuclei and large basophilic inclusions) in the urine was investigated. Patients were followed-up for 1 year to see if rejection occurred., Results: Five of 39 patients (12.8%) showed BK viremia; 11 patients (28.2%) showed BK viruria, and 13 (33.3%) showed decoy cells. No statistically significant differences were found between BK virus positive and negative groups, respecting demographic variables, kidney and liver functions, and graft survival. BK virus DNA positivity in blood was the standard, while decoy cell assessment in urine and BK virus polymerase chain reaction test sensitivity in urine was 40%., Conclusions: No matter the method used to detect BK virus in the urine, the negativity of the tests is more valuable than their positivity. Although no statistically significant difference was found between the groups, we concluded that BK virus is a factor that should be considered when unexplained deterioration in kidney and liver function tests is observed in liver transplant recipients. Prospective studies with larger numbers of patients are warranted.
- Published
- 2014
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31. Malign recurrence of primary chest wall hemangiopericytoma in the lung after four years: a case report and review of the literature.
- Author
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Akman T, Alacacioglu A, Dolek D, Unek T, Gurel D, Yilmaz AU, and Onen A
- Abstract
Hemangiopericytoma (HPC) may develop in every site where the endothelial tissue exits and primarily develops in the skeletal-muscular system or the skin. Adult cases of HPC generally exhibit a benign course. 20-30% of the cases may show a malign course. The tumors that show more than four mitoses, a focal area of necrosis, and increased cellularity on a magnification ×10 are considered as malign. In our paper, we presented our case who showed a lung metastasis at the end of 4 years and who developed a pathological fracture of the right humerus at the end of approximately 2 years, because hemangiopericytoma is rarely seen in the chest wall as a primary tumor.
- Published
- 2014
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32. Effects of blood products on nosocomial infections in liver transplant recipients.
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Ozkardesler S, Avkan-Oguz V, Akan M, Unek T, Ozbilgin M, Meseri R, Cimen M, and Karademir S
- Subjects
- Adolescent, Adult, Erythrocyte Transfusion statistics & numerical data, Female, Gastrointestinal Diseases epidemiology, Humans, Incidence, Liver Cirrhosis surgery, Male, Middle Aged, Respiratory Tract Infections epidemiology, Retrospective Studies, Risk Factors, Urinary Tract Infections epidemiology, Young Adult, Cross Infection epidemiology, Erythrocyte Transfusion adverse effects, Liver Transplantation, Plasma, Transplantation
- 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
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33. Prevalence and risk factors for obesity after liver transplantation: a single-center experience.
- Author
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Akarsu M, Bakir Y, Karademir S, Unek T, Bacakoglu A, and Astarcioglu I
- Abstract
Background: The study of weight gain after transplantation and its associated factors is necessary to propose strategies to prevent and treat this problem., Objectives: This study aims to investigate factors affecting the development of obesity after liver transplantation (LTx)., Patients and Methods: Medical records of 343 liver transplantation cases, which were followed between January 2001 and January 2010 at Dokuz Eylul University, were retrospectively analyzed. Patient pre-liver transplantation height, body weight, body mass index (BMI) measurements, as well as changes in body weight at the beginning, 6 months, 12 months, and 5 years post-transplantation were observed. BMI measurements with records of immunosuppressive therapies were obtained., Results: The study was carried out with the records of 226 patients. 151 patients (66.8%) were male; 75 (33.2%) were female. The mean age was 46.19 ± 10.2 years. 123 of these liver transplants were performed from living donors, while 103 were from cadaveric donors. The causes of liver transplantation were hepatitis D virus (HDV) infection (28%), hepatitis B virus (HBV) infection (24%), hepatitis C virus (HCV) infection (24%), alcoholic liver disease (9%), cryptogenic liver disease (9%), autoimmune hepatitis (4%), and other (2%). In this study, the prevalence of obesity was 21% at the end of the second year, decreasing to 14% by the end of the fifth year. The mean BMI gradually increased during the follow-ups, reaching 25.1 kg/m² and 26 kg/m² six months after liver transplantation and at the end of the first year, respectively (P < 0.002). Obesity developed in 18.2% of post-transplant patients who were receiving a calcineurin inhibitor (CNI). Regarding the development of obesity after transplantation, no statistically significant difference was found between patients using cyclosporine (CsA) and tacrolimus (TAC) (P = 0.07). Six months after liver transplantation, the mean body weight gain in the groups receiving steroids and not receiving steroids were 4.71 kg and 2.7 kg, respectively (P = 0.03). In the post-transplant period, there was no significant difference in patients who had received TAC and CsA for development of diabetes mellitus (DM), hypertension (HT), or hyperlipidemia (HL) (P = 0.30)., Conclusions: Obesity prevalence before and after liver transplantation was comparable. Education of obese patients prior to surgery and recommendation of medical nutrition therapy should be appropriate. Similar medical care for the non-obese subjects could prevent increase in obesity prevalence. Non-corticosteroid immunosuppressive agents had no significant effect on the development of weight gain and obesity. Avoiding the use of long-term steroid therapy and obesity education are the key measures for preventing obesity after liver transplantation.
- Published
- 2013
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34. Isospora belli in a patient with liver transplantation.
- Author
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Usluca S, Inceboz T, Unek T, and Aksoy U
- Subjects
- Adult, Animals, Anti-Infective Agents therapeutic use, Diarrhea drug therapy, Diarrhea parasitology, Feces parasitology, Humans, Immunosuppressive Agents administration & dosage, Isospora classification, Isospora isolation & purification, Isosporiasis drug therapy, Male, Occult Blood, Oocysts, Recurrence, Trimethoprim, Sulfamethoxazole Drug Combination therapeutic use, Isosporiasis diagnosis, Liver Transplantation
- Abstract
Isospora belli is an opportunistic protozoon which should be monitored in patients with gastrointestinal complaints such as abdominal pain, nausea and diarrhoea, in both immune-compromised and immune-competent patients. Our case was a 35 year-old male patient who had received a liver transplant because of cirrhosis and hepatic fibrosis. A diarrhoeic stool sample of the patient was sent to the laboratory for microbiological and parasitological analyses. Faecal occult blood was positive and bacteriological analysis was negative. Isospora belli infection was diagnosed by detection of the oocysts in stool samples. Per oral trimethoprim-sulphamethoxazole treatment was given in 500 mg bid dose for 10 days. At the end of the treatment, no oocyst of Isospora belli was seen but non-pathogenic cysts of Entamoeba coli and vacuolar forms of Blastocystis hominis were observed. Two months later the patient had abdominal pain, fatigue and diarrhoea again and parasitological re-evaluation showed oocysts of Isospora belli.
- Published
- 2012
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35. Comparison of Milan and UCSF criteria for liver transplantation to treat hepatocellular carcinoma.
- Author
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Unek T, Karademir S, Arslan NC, Egeli T, Atasoy G, Sagol O, Obuz F, Akarsu M, and Astarcioglu I
- Subjects
- Adult, Aged, Carcinoma, Hepatocellular pathology, Disease-Free Survival, Female, Humans, Kaplan-Meier Estimate, Liver Neoplasms pathology, Male, Middle Aged, Patient Selection, Retrospective Studies, Treatment Outcome, Carcinoma, Hepatocellular mortality, Carcinoma, Hepatocellular surgery, Liver Neoplasms mortality, Liver Neoplasms surgery, Liver Transplantation methods, Liver Transplantation mortality
- Abstract
Aim: To assess the validity of the Milan and University of California San Francisco (UCSF) criteria and examine the long-term outcome of orthotopic liver transplantation (OLT) in patients with hepatocellular carcinoma (HCC) in a single-center study., Methods: This study is a retrospective review of prospectively collected data. Between 1998 and 2009, 56 of 356 OLTs were performed in patients with HCC. Based on pathological examination of liver explants, patients were retrospectively categorized into 3 grou-ps: Milan + (n = 34), Milan -/UCSF + (n = 7) and UCSF - (n = 14)., Results: Median follow-up period was 39.5 (1-124) mo. The 5-year overall survival rates in the Milan +, Milan -/UCSF + and UCSF-groups were 87.7%, 53.6% and 33.3%, respectively (P < 0.000). Within these groups, tumor recurrence was determined in 5.8%, 14.3% and 40% of patients, respectively (P < 0.011). Additionally, the presence of microvascular invasion within the explanted liver had a negative effect on the 5-year disease free survival (74.7% vs. 46.7%, P < 0.044)., Conclusion: The Milan criteria are reliable in the selection of suitable candidates for OLT for the treatment of HCC. For cases of OLT involving living donors, the UCSF criteria may be applied.
- Published
- 2011
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36. Mitomycin-C in combination with fluoropyrimidines in the treatment of metastatic colorectal cancer after oxaliplatin and irinotecan failure.
- Author
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Alkis N, Demirci U, Benekli M, Yilmaz U, Isikdogan A, Sevinc A, Ozdemir NY, Koca D, Yetisyigit T, Kaplan MA, Uncu D, Unek T, and Gumus M
- Subjects
- Adult, Aged, Aged, 80 and over, Antineoplastic Combined Chemotherapy Protocols administration & dosage, Antineoplastic Combined Chemotherapy Protocols adverse effects, Camptothecin administration & dosage, Camptothecin analogs & derivatives, Colorectal Neoplasms mortality, Colorectal Neoplasms pathology, Female, Fluorouracil administration & dosage, Humans, Irinotecan, Leucovorin administration & dosage, Male, Middle Aged, Mitomycin administration & dosage, Neoplasm Metastasis, Organoplatinum Compounds administration & dosage, Oxaliplatin, Tegafur administration & dosage, Uracil administration & dosage, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Colorectal Neoplasms drug therapy, Fluorouracil therapeutic use, Mitomycin therapeutic use, Salvage Therapy
- Abstract
Purpose: To retrospectively evaluate the efficacy and tolerability of mitomycin-C (MMC) in combination with fluoropyrimidines as salvage 3rd -or 4th-line therapy in metastatic colorectal cancer (MCRC) patients., Methods: All patients in this study had previously failed oxaliplatin and irinotecan-based chemotherapy. Patients were treated with MMC (6 mg/m(2) intravenously/i.v.) on day 1 in combination with either oral UFT (500 mg/m(2)) and oral leucovorin (LV) (30 mg) on days 1-14 every 3 weeks (group A) or infusional 5-fluorouracil (5-FU) by deGramont regimen with i.v. LV (200 mg/m(2)) on days 1 and 2, every 2 weeks (group B)., Results: Thirty-nine MCRC patients were analyzed. Twenty-two of them were in group A and 17 in group B. Thirty-three were evaluable for clinical efficacy. The clinical benefit in the intent-to-treat (ITT) population was 30.8%. Median progression free survival (PFS) was 6 months (95% confidence interval/ CI 4-8) and median overall survival (OS) 9 months (95% CI 6.5-11.5). Median PFS was 3 months (95% CI 2.4-3.6) in group A and 7 months (95% CI 5.1-8.9) in group B (p=0.009). Median OS was 7 months (95% CI 4.3-9.7) in group A and 12 months (95% CI 5.4-18.6) in group B (p=0.422). The combination of MMC and fluoropyrimidines was generally well tolerated. The most common severe toxicities were nausea and vomiting, neutropenia, hepatotoxicity and diarrhea., Conclusion: MMC in combination with fluoropyrimidines is safe and active in heavily-pretreated MCRC patients. This combination remains a viable option in these patients. However, better therapies are urgently needed.
- Published
- 2011
37. Anesthesia-related complications in living liver donors: the experience from one center and the reporting of one death.
- Author
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Ozkardesler S, Ozzeybek D, Alaygut E, Unek T, Akan M, Astarcioglu H, Karademir S, Astarcioglu I, and Elar Z
- Subjects
- Adolescent, Adult, Fatal Outcome, Female, Hepatectomy adverse effects, Humans, Liver pathology, Living Donors, Male, Middle Aged, Retrospective Studies, Risk, Treatment Outcome, Anesthesia adverse effects, Intraoperative Complications mortality, Liver Transplantation methods
- 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
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38. Epidemiology and survival of hepatocellular carcinoma in Turkey: outcome of multicenter study.
- Author
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Alacacioglu A, Somali I, Simsek I, Astarcioglu I, Ozkan M, Camci C, Alkis N, Karaoglu A, Tarhan O, Unek T, and Yilmaz U
- Subjects
- Adolescent, Adult, Aged, Biomarkers, Tumor metabolism, Carcinoma, Hepatocellular metabolism, Carcinoma, Hepatocellular virology, Female, Follow-Up Studies, Hepacivirus pathogenicity, Hepatitis B virus pathogenicity, Hepatitis B, Chronic metabolism, Hepatitis B, Chronic virology, Hepatitis C, Chronic metabolism, Hepatitis C, Chronic virology, Humans, Incidence, Liver Cirrhosis metabolism, Liver Cirrhosis mortality, Liver Cirrhosis virology, Liver Neoplasms metabolism, Liver Neoplasms virology, Male, Middle Aged, Neoplasm Staging, Prognosis, Risk Factors, Survival Rate, Turkey epidemiology, alpha-Fetoproteins metabolism, Carcinoma, Hepatocellular mortality, Hepatitis B, Chronic mortality, Hepatitis C, Chronic mortality, Liver Neoplasms mortality
- Abstract
Objective: Hepatocellular cancer (HCC) is one of the important health problems in Turkey. We aimed to determine the clinical and demographic features of HCC in the Turkish population and to evaluate the prognostic and survival features., Method: Two hundred and twenty-one patients with HCC from five hospitals in Turkey are included in this study., Results: In 44.4% of the 221 patients with hepatitis B virus and in 21.3% of the 221 patients with hepatitis C virus were found to be responsible for HCC etiology. It has been shown that HCC developed on cirrhosis basis in 74.2% of the patients. HCC was presented with single solitary nodule in 69.2% of the patients. Non-liver metastasis was present in 12.5% of the patients. In 21.7% of the patients, alpha-fetoprotein (AFP) levels were above the diagnostics level of 400 ng/ml. The median overall survival (OS) of 221 patients was 14 months. The median OS of the patients with Child-Pugh A class was significantly longer than that with Child-Pugh B and C classes. The OS of the individuals with normal AFP levels was also longer than that with high AFP levels. The OS of the patients with Stage I HCC according to tumor node metastasis (TNM) classification, the female patients and the treated patients group was found to be significantly good., Conclusions: In conclusion, the viral etiology (hepatitis B and C infections) in Turkish population is found to be an important factor in HCC development. The Child-Pugh classification, AFP levels, TNM classification, being female and treatment were determined to be important prognostic factors in HCC patients.
- Published
- 2008
- Full Text
- View/download PDF
39. Multivisceral resections for primary advanced rectal cancer.
- Author
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Sökmen S, Terzi C, Unek T, Alanyali H, and Füzün M
- Subjects
- Adenocarcinoma pathology, Adenocarcinoma secondary, Adult, Aged, Aged, 80 and over, Female, Humans, Intestine, Small surgery, Liver Neoplasms secondary, Liver Neoplasms surgery, Lung Neoplasms secondary, Lung Neoplasms surgery, Male, Middle Aged, Neoplasm Invasiveness, Neoplasm Recurrence, Local mortality, Neoplasm Recurrence, Local surgery, Neoplasm Staging, Ovary surgery, Rectal Neoplasms pathology, Reoperation, Retrospective Studies, Severity of Illness Index, Survival Analysis, Survival Rate, Tissue Adhesions surgery, Urinary Bladder surgery, Uterus surgery, Adenocarcinoma mortality, Adenocarcinoma surgery, Rectal Neoplasms mortality, Rectal Neoplasms surgery
- Abstract
Fixation of the locally advanced rectal tumor at the time of operation is an important prognostic variable. It may be difficult to determine whether fixation is caused by inflammatory adhesions or by direct tumor extension tethering the tumor to the surrounding pelvic structures. Extended en bloc removal of the locally advanced rectal cancer with involved adjacent organ(s) increases the resectability rate. We examined the perioperative mortality and morbidity and the prognosis of patients undergoing multivisceral resections for advanced primary rectal cancers. Of 83 patients with rectal cancers 20 (24%) had locally advanced tumors. Cases were divided into Gunderson-Sosin stages B(3) and C(3) and were further stratified into those with histologically confirmed carcinomatous invasion of the adjacent organ and those with inflammatory adhesions. Perioperative mortality was 5%. Only five patients (24%) showed histopathological confirmation of carcinomatous adhesion into adjacent organ(s)/structure(s). Histological confirmation of contiguous tumor spread was higher in C(3) patients. There was no significant difference between patients with positive and negative histopathological confirmation of malignant spread in terms of survival rates. Multivisceral resections can be performed safely for locally advanced rectal cancers with acceptable mortality and morbidity rates. The presence of local tumor extension does not mean incurability, and sound surgical judgement should dictate that in the face of a tethered lesion one must extend the surgical intervention radically to resect any tumor en bloc.
- Published
- 1999
- Full Text
- View/download PDF
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