37 results on '"Cost N"'
Search Results
2. Utility of retrograde ureterocelogram in management of complex ureterocele
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Arevalo, M.K., Prieto, J.C., Cost, N., Nuss, G., Brown, B.J., and Baker, L.A.
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- 2017
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3. Oncologic outcomes of partial versus radical nephrectomy for unilateral Wilms tumor.
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Cost, N. G., primary, Lubahn, J. D., additional, Penn, H. A., additional, Granberg, C. F., additional, Schlomer, B. J., additional, Wickiser, J. E., additional, Rakheja, D., additional, Gargollo, P. C., additional, Leonard, D., additional, Baker, L. A., additional, Raj, G., additional, and Margulis, V., additional
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- 2011
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4. The impact of targeted molecular therapy on the level of renal cell carcinoma (RCC) venous tumor thrombus.
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Cost, N. G., primary, Delacroix, S. E., additional, Sleeper, J. P., additional, Smith, P. J., additional, Youssef, R. F., additional, Chapin, B. F., additional, Karam, J. A., additional, Culp, S. H., additional, Abel, E. J., additional, Brugarolas, J., additional, Raj, G., additional, Sagalowsky, A. I., additional, Wood, C. G., additional, and Margulis, V., additional
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- 2011
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5. Can contemporary targeted therapies provide clinically meaningful changes in renal cell carcinoma venous tumor thrombi?
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Delacroix, S. E., primary, Chapin, B. F., additional, Cost, N., additional, Karam, J. A., additional, Culp, S. H., additional, Abel, E. J., additional, Gonzalez, G., additional, Margulis, V., additional, and Wood, C. G., additional
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- 2011
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6. Recurrent Fulminant Liver Failure Caused by Hepatitis B Virus After Liver Transplantation
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de la Mata, Manuel, primary, Rufi??n, Sebasti??n, additional, G??mez, Federico, additional, Varo, Evaristo, additional, L??pez-Cillero, P, additional, Cost??n, Guadalupe, additional, Sol??rzano, Guillermo, additional, Gonz??lez, Rafael, additional, Mifio, Gonzalo, additional, and Pera, Carlos, additional
- Published
- 1994
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7. Human balanced translocation and mouse gene inactivation implicate Basonuclin 2 in distal urethral development
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Ej, Bhoj, Ramos P, La, Baker, Garg V, Cost N, Agneta Nordenskjöld, Ff, Elder, Sb, Bleyl, Ne, Bowles, Cb, Arrington, Delhomme B, Vanhoutteghem A, Djian P, and Ar, Zinn
8. Biomass inventory and assessment in the southern United States
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McClure, J. P. and Cost, N. D.
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FOREST products industry , *RENEWABLE energy sources , *WOOD , *BIOMASS estimation - Published
- 1984
9. Estimating the forested-wetland resource in the southeastern United States with forest survey data
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Cost, N. D. and Tansey, J. B.
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FORESTS & forestry - Published
- 1990
10. Urothelial carcinoma at the uretero-enteric junction: Multi-center evaluation of oncologic outcomes after radical nephroureterectomy
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Richard Zigeuner, Arthur I. Sagalowsky, Vitaly Margulis, Yair Lotan, Christian Bolenz, Francesco Montorsi, Thomas F. Chromecki, Nicholas G. Cost, Christopher G. Wood, Ramy F. Youssef, Cord Langner, Shahrokh F. Shariat, Youssef, Rf, Shariat, Sf, Lotan, Y, Cost, N, Wood, Cg, Sagalowsky, Ai, Zigeuner, R, Langner, C, Chromecki, Tf, Montorsi, Francesco, Bolenz, C, and Margulis, V.
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Adult ,Male ,Oncology ,Urologic Neoplasms ,medicine.medical_specialty ,Time Factors ,Urology ,Kaplan-Meier Estimate ,Disease ,Nephrectomy ,Disease-Free Survival ,Ureter ,Risk Factors ,Internal medicine ,Outcome Assessment, Health Care ,medicine ,Humans ,Uretero-enteric ,Aged ,Proportional Hazards Models ,Urothelial carcinoma ,Aged, 80 and over ,Carcinoma, Transitional Cell ,business.industry ,Rectum ,Cancer ,Middle Aged ,medicine.disease ,Natural history ,medicine.anatomical_structure ,Upper tract ,Locally advanced disease ,Multivariate Analysis ,Female ,Neoplasm Recurrence, Local ,business ,Follow-Up Studies - Abstract
Objective The natural history of urothelial carcinoma arising at the uretero-enteric junction (UEJ) is poorly defined, and the data guiding clinical management of these patients is limited. Therefore, we evaluated oncologic outcomes of patients treated for urothelial carcinoma at the UEJ. Methods Utilizing a multi-institutional database of patients treated with radical nephroureterectomy (RNU), we assessed the clinicopathologic parameters and oncologic outcomes of UEJ tumors compared with other upper tract urothelial carcinomas (UTUC). Survival analyses were performed to determine independent predictors of disease recurrence and cancer-specific mortality after RNU. Results The study included 1,363 patients, 921 men and 442 women with 36 months median follow-up after RNU. Compared with UTUC in the kidney or ureter, UEJ tumors ( n = 22) were more likely to demonstrate features of advanced disease, which were proved to be independent predictors of disease recurrence and cancer-specific mortality after RNU. The 5 year disease-free survival (DFS) and cancer-specific survival (CSS) rates were 25% and 39% in those with UEJ tumors vs. 69% and 73% in those with UTUC in the kidney or ureter ( P = 0.001 and P = 0.008, respectively). Conclusions UEJ tumors harbor features of locally advanced disease associated with high risk of systemic recurrence and death from cancer after RNU. Our findings suggest the need for integration of systemic therapy into the management paradigm of these patients.
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- 2013
11. Behind the decline: why are natural pine stands in the Southeast growing slower
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Cost, N
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- 1987
12. Multiresource inventories: woody biomass in Virginia. Forest Service research paper
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Cost, N
- Published
- 1988
13. Multiresource inventories: woody biomass in North Carolina. Forest Service Research paper
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Cost, N
- Published
- 1986
14. A Comparison of Commonly Utilized Diagnostic Biopsy Techniques for Pediatric Patients With Cancer: A Systematic Review by the APSA Cancer Committee.
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Teke M, Rich BS, Walther A, Schwartz D, McDuffie LA, Butera G, Roach JP, Rothstein DH, Lal DR, Riehle K, Espinoza A, Cost N, Tracy E, Rodeberg D, Lautz T, Aldrink JH, and Brown EG
- Abstract
Background: Historically, surgical biopsy (SB) for diagnosis of pediatric solid tumors was considered necessary to provide adequate tissue for histologic and molecular analysis. Less invasive biopsy techniques such as image-guided core needle biopsy (CNB), have shown comparable accuracy with decreased morbidity in some adult studies. However, data regarding the safety and efficacy of CNB in pediatric tumors is limited. This study's aim was to assess the overall rate of successful diagnosis and safety of CNB compared to SB in children with malignancies., Methods: A PRISMA compliant systematic review was performed in MEDLINE via PubMed, Embase and CINAHL Plus database searches from 2010 to 2023. Studies were included with relevance to the following clinical question: For children with concern for malignancy requiring biopsy for diagnosis, how does CNB compare to open or laparoscopic/thoracoscopic SB in terms of safety and diagnostic efficacy? Data for patients ≤21 years requiring biopsy for diagnosis of liver tumors, neuroblastoma (NB), soft tissue sarcoma (STS), and lymphoma were included., Results: Twenty-seven studies including 2477 patients met inclusion criteria, with 2065 undergoing CNB and 412 SB. Of the 2477 patients, 820 patients had NB, 307 liver tumors, 96 STS, 151 lymphoma, and 1103 patients were from studies that included multiple diagnoses. The average complication rate for CNB was 2.9% compared to 21.4% for SB (p < 0.001). Bleeding was the most common complication in both groups, but significantly higher after SB (22.1% vs 2.3%) (p < 0.001). CNB was diagnostic in 90.8% of patients compared to 98.8% who underwent SB (p < 0.001)., Conclusions: Rates of successful diagnosis were greater than 90% for both CNB and SB, though significantly higher for SB. Conversely, complication rates were close to ten times higher after SB compared to CNB. Given its relatively lower risk profile, CNB can be a safe and useful diagnostic tool for children with solid malignancies. Research focused on enhancing CNB's diagnostic accuracy while maintaining low morbidity should be further explored., Level of Evidence: Treatment study, Level III., Competing Interests: Declaration of competing interest The authors have nothing to declare., (Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2024
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15. Pediatric Urologic Oncology Series-Renal Tumors.
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Lorenzo A, Buchanan AF, Cost N, Kieran K, and Romao R
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Competing Interests: Declaration of Competing Interest The authors declare that they have no conflict of interest.
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- 2024
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16. Development of an enhanced recovery after surgery program for pediatric solid tumors.
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Mansfield SA, Kotagal M, Hartman S, Murphy AJ, Davidoff AM, Anghelescu DL, Mecoli M, Cost N, Hogan B, and Rove KO
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Introduction: Enhanced recovery after surgery (ERAS) is an evidence-based, multi-modal approach to decrease surgical stress, expedite recovery, and improve postoperative outcomes. ERAS is increasingly being utilized in pediatric surgery. Its applicability to pediatric patients undergoing abdominal tumor resections remains unknown., Methods and Analysis: A group of key stakeholders adopted ERAS principles and developed a protocol suitable for the variable complexity of pediatric abdominal solid tumor resections. A multi-center, prospective, propensity-matched case control study was then developed to evaluate the feasibility of the protocol. A pilot-phase was utilized prior to enrollment of all patients older than one month of age undergoing any abdominal, retroperitoneal, or pelvic tumor resections. The primary outcome was 90-day complications per patient. Additional secondary outcomes included: ERAS protocol adherence, length of stay, time to administration of adjuvant chemotherapy, readmissions, reoperations, emergency room visits, pain scores, opioid usage, and differences in Quality of Recovery 9 scores., Ethics and Dissemination: Institutional review board approval was obtained at all participating centers. Informed consent was obtained from each participating patient. The results of this study will be presented at pertinent society meetings and published in peer-reviewed journals. We expect the results will inform peri-operative care for pediatric surgical oncology patients and provide guidance on initiation of ERAS programs. We anticipate this study will take four years to meet accrual targets and complete follow-up., Trial Registration Number: NCT04344899., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (© 2024 Mansfield, Kotagal, Hartman, Murphy, Davidoff, Anghelescu, Mecoli, Cost, Hogan and Rove.)
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- 2024
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17. Principles of Pediatric Palliative Surgical Oncology: A Guide To Palliative Care For Pediatric Surgeons.
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Halix SJ, Robbins AJ, Cameron DB, Baertschiger RM, Roach J, Brown EG, Aldrink JH, Rodeberg DA, Cost N, Snaman J, and Le HD
- Abstract
Competing Interests: The authors report no conflicts of interest.
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- 2024
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18. National trends in clinical and pathologic staging for upper tract urothelial carcinoma: Implications for neoadjuvant chemotherapy.
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Rodrigues Pessoa R, Morrison JC, Konety B, Gershman B, Maroni P, Kukreja JB, Cost N, Flaig T, Kessler E, Sharma P, and Kim SP
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- Aged, Female, Humans, Male, Neoplasm Staging, Neoadjuvant Therapy methods, Urinary Bladder Neoplasms drug therapy
- Abstract
Introduction: With growing support of perioperative chemotherapy for upper tract urothelial carcinoma (UTUC), current biopsy methods are challenging, and little is known as to the degree to which patients would appropriately receive neoadjuvant chemotherapy (NAC) from biopsy alone. Herein, we sought to assess the rates of appropriate clinical use of NAC and identify clinicopathologic factors associated with aggressive UTUC amongst patients undergoing radical nephroureterectomy (RNU) for clinically localized disease., Methods: From 2004 to 2013, we identified all treatment naïve patients diagnosed with clinically localized, high grade UTUC (cTa-4Nx) who underwent RNU from the National Cancer Database (NCDB). Pathologic criteria for NAC (pT2-4N0,x; pTanyN1) from RNU represented the primary outcome. Bivariate and multivariable analyses were utilized to identify covariates associated with primary outcome to determine appropriate use of NAC., Results: During the study interval, 5,362 patients were diagnosed with clinically localized UTUC and underwent RNU. Overall, 49.1% of patients presented with an unknown primary tumor stage (Tx) and 24.5% had invasive UTUC from biopsy. On multivariable analysis, upper tract tumor size was associated with invasive UTUC eligible for NAC (all P < 0.05). Amongst patients with cTx UTUC from biopsy, half of patients had pathologic noninvasive UTUC (pTa,is,1) from RNU and would be overtreated with NAC., Conclusion: Significant uncertainty persists in assigning primary upper tract tumor depth and represents a key barrier to widespread implementation of NAC for patients with high grade UTUC. Further research is needed to more accurately determine clinical criteria to identify patients for NAC., (Copyright © 2021. Published by Elsevier Inc.)
- Published
- 2021
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19. EDITORIAL COMMENT.
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Rodriguez-Pessoa R, Cost N, Tevis SE, and Kim SP
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- 2021
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20. Centralization of Health Care to Facilitate Greater Use of Nephron-Sparing Surgery for Localized Renal Tumors: Identifying Appropriate Health Care Delivery.
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Morrison JC, Gershman B, Konety B, Cost N, and Kim SP
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- Germany, Humans, Nephrectomy standards, Nephrons, Practice Guidelines as Topic, Retrospective Studies, United States, Carcinoma, Renal Cell pathology, Carcinoma, Renal Cell surgery, Delivery of Health Care organization & administration, Kidney Neoplasms pathology, Kidney Neoplasms surgery
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- 2020
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21. Testicular Cancer, Version 2.2020, NCCN Clinical Practice Guidelines in Oncology.
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Gilligan T, Lin DW, Aggarwal R, Chism D, Cost N, Derweesh IH, Emamekhoo H, Feldman DR, Geynisman DM, Hancock SL, LaGrange C, Levine EG, Longo T, Lowrance W, McGregor B, Monk P, Picus J, Pierorazio P, Rais-Bahrami S, Saylor P, Sircar K, Smith DC, Tzou K, Vaena D, Vaughn D, Yamoah K, Yamzon J, Johnson-Chilla A, Keller J, and Pluchino LA
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- Combined Modality Therapy, Humans, Male, Neoplasm Metastasis, Prognosis, Testicular Neoplasms diagnosis, Practice Guidelines as Topic standards, Testicular Neoplasms classification, Testicular Neoplasms therapy
- Abstract
Testicular cancer is relatively uncommon and accounts for <1% of all male tumors. However, it is the most common solid tumor in men between the ages of 20 and 34 years, and the global incidence has been steadily rising over the past several decades. Several risk factors for testicular cancer have been identified, including personal or family history of testicular cancer and cryptorchidism. Testicular germ cell tumors (GCTs) comprise 95% of malignant tumors arising in the testes and are categorized into 2 main histologic subtypes: seminoma and nonseminoma. Although nonseminoma is the more clinically aggressive tumor subtype, 5-year survival rates exceed 70% with current treatment options, even in patients with advanced or metastatic disease. Radical inguinal orchiectomy is the primary treatment for most patients with testicular GCTs. Postorchiectomy management is dictated by stage, histology, and risk classification; treatment options for nonseminoma include surveillance, systemic therapy, and nerve-sparing retroperitoneal lymph node dissection. Although rarely occurring, prognosis for patients with brain metastases remains poor, with >50% of patients dying within 1 year of diagnosis. This selection from the NCCN Guidelines for Testicular Cancer focuses on recommendations for the management of adult patients with nonseminomatous GCTs.
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- 2019
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22. Expert opinion: open primary, nerve-sparing retroperitoneal lymph node dissection.
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Cost NG
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- Computers, Humans, Learning, Lymph Node Excision, Neoplasms, Germ Cell and Embryonal
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- 2019
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23. Factors related to lymph node sampling at the time of surgery in children, adolescents, and young adults with unilateral non-metastatic renal cell carcinoma.
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Saltzman AF, Stokes W, Walker J, and Cost NG
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- Adolescent, Adult, Biopsy, Child, Female, Humans, Lymph Nodes pathology, Lymphatic Metastasis pathology, Male, Young Adult, Carcinoma, Renal Cell pathology, Carcinoma, Renal Cell surgery, Kidney Neoplasms pathology, Kidney Neoplasms surgery
- Abstract
Introduction: Renal cell carcinoma (RCC) is rare in the pediatric, adolescent, and young adult (PAYA) population. PAYA patients with RCC have a high rate of lymph node (LN) involvement, regardless of primary tumor size, yet data to guide surgical LN management in this group are limited., Objective: The objective of this study was to determine what factors are associated with LN sampling (protocol adherence) in PAYAs with RCC., Methods: The National Cancer Database (NCDB) between 2004 and 2013 was queried for patients aged ≤30 yrs with non-metastatic, unilateral RCC managed with surgery. Logistic regression analyses were performed to evaluate factors associated with LN sampling., Results: A total of 2857 patients met study criteria. Pathologically, 2510 (87.8%) patients were Nx, 278 (9.7%) N0, and 69 (2.4%) N1. Older age was associated with omission of LN sampling (odds ration [OR]: 1.065, 95% confidence interval [CI]: 1.04-1.1, P < 0.001). Higher institutional volume (OR: 0.971, 95% CI: 0.96-0.99, P < 0.001), stage 3 tumors (OR: 0.19, 95% CI: 0.11-0.33, P < 0.001), pre-operative clinical node involvement (OR: 0.32, 95% CI: 0.12-0.86, P = 0.024), tumor size >10 cm (OR: 0.27, 95% CI: 0.12-0.57, P = 0.001), and radical nephrectomy (OR: 0.245, 95% CI: 0.16-0.38, P < 0.001) were associated with patients undergoing LN sampling., Discussion: Lymph node sampling is performed in <15% of PAYA patients with RCC. Given the higher rate of translocation RCC pathology in younger patients, which leads to a higher prevalence of nodal involvement (especially with small masses), and the subsequent need for aggressive surgical control of disease, LN sampling and protocol adherence are potentially underutilized in this population and may present a unique opportunity for urologists to improve the care of PAYAs. Data from administrative databases are helpful for rare diseases such as PAYA RCC, but comes with limitations such as missing data. There are several factors that could contribute to LN sampling utilization (National comprehensive cancer network (NCCN) or Children's Oncology Group institution designation, surgeon experience, annual volume, specialty, operative approach, etc.) that cannot be further examined using the NCDB., Conclusion: Pediatric, adolescent, and young adult patients with localized RCC are less likely to undergo surgical LN sampling if they are older, have tumors <10 cm or of less advanced stage, have no pre-operative clinical suspicion of LN involvement, are treated with partial nephrectomy, or are treated at lower volume centers. It appears that approaches from adults with RCC are being applied to PAYAs despite evidence that PAYAs with RCC experience a significant rate of LN involvement even with small tumors., (Copyright © 2019 Journal of Pediatric Urology Company. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2019
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24. Appropriateness for testis-sparing surgery based on the testicular tumor size in a pediatric and adolescent population.
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Caldwell BT, Saltzman AF, Maccini MA, and Cost NG
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- Adolescent, Child, Child, Preschool, Humans, Infant, Male, Retrospective Studies, Orchiectomy methods, Organ Sparing Treatments methods, Testicular Neoplasms pathology, Testicular Neoplasms surgery, Tumor Burden
- Abstract
Introduction: In children, most small testicular tumors are benign, and testicular-sparing surgery (TSS) is a viable treatment option., Objective: The objective of this study is to assess for correlation between the tumor size and final pathologic diagnoses appropriate for TSS for pediatric and adolescent patients with an intratesticular mass and negative serum tumor markers (STMs)., Materials and Methods: A retrospective review of 24 patients (aged 0-18 years) who underwent radical or partial orchiectomy between 2003 and 2015. Patients with unifocal, unilateral intratesticular tumors and negative STMs were included. Tumors with benign and non-germ cell histology were considered appropriate for TSS, and active germ cell tumor elements on final histology were categorized as inappropriate for TSS. Baseline characteristics, tumor size, and frozen section results were evaluated for association, for the entire cohort and then for a subset of pubertal and postpubertal patients (defined as ≥10 years old)., Results: Patients with testicular tumor pathology inappropriate for TSS were significantly older (median age 17.1 years, P = 0.03). A 2-cm size cutoff did not accurately predict pathology for the entire cohort, or for just pubertal and postpubertal patients (P = 0.132, P = 0.154, respectively). Frozen section and final pathology demonstrated good agreement (κ = 0.826, P < 0.001) as did pre-operative and final pathologic size measurement (κ = 0.703, P < 0.001). Frozen section analysis did not miss a TSS inappropriate pathology., Discussion: The present data refute the finding in adults that a 2-cm cutoff accurately predicts pathology in pediatric patients with an intratesticular mass and normal STMs. These data suggest that TSS should still be offered, regardless of the tumor size alone, but frozen section appears to more accurately predict pathology than the tumor size, and its use should, thus, be emphasized. There are several limitations of this study to mention. First, this is a retrospective review of a small cohort of patients with a rare clinical scenario, which necessitated the combination of pediatric and adolescent patients. The study did not evaluate oncologic outcomes., Conclusions: In children with an intratesticular tumor and normal STMs, a tumor size cutoff of 2 cm does not appear to accurately predict the final pathology. However, the data presented support the continued use intra-operative frozen section analysis in both children and adolescents undergoing TSS., (Copyright © 2018 Journal of Pediatric Urology Company. Published by Elsevier Ltd. All rights reserved.)
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- 2019
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25. Development of a postoperative care pathway for children with renal tumors.
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Saltzman AF, Warncke JC, Colvin AN, Carrasco A Jr, Roach JP, Bruny JL, and Cost NG
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- Adolescent, Child, Child, Preschool, Female, Humans, Infant, Length of Stay statistics & numerical data, Male, Retrospective Studies, Critical Pathways, Kidney Neoplasms surgery, Nephrectomy, Postoperative Care
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Purpose: To identify the factors associated with a shorter postoperative stay, as an initial step to develop a care pathway for children undergoing extirpative kidney surgery., Study Design: This study retrospectively reviewed patients managed with upfront open radical nephrectomy for renal tumors between 2005 and 2016 at a pediatric tertiary care facility. Univariate and multivariate logistic regression were performed to identify factors associated with early discharge (by postoperative day 4)., Results: A total of 84 patients met inclusion criteria. Median age was 28.1 months (range 1.8-193.1). Thirty-four (40.5%) patients had a nasogastric tube postoperatively. The patients were advanced to a clear liquid diet on a median postoperative day 2 (range 0-7) and regular diet on a median postoperative day 3 (range 1-8). Median time from surgery to discharge was 5 days (range 2-12), with 38 (45.2%) discharged early. Univariate and multivariate logistic regression analyses showed that earlier resumption of regular diet (OR 0.523, P = 0.028) was positively associated with early discharge. Other analyzed factors were not significant (see Table)., Discussion: Timely initiation of adjuvant therapy is a specific requirement of Children's Oncology Group (COG) protocols. Chemotherapy and radiation therapy are ideally initiated simultaneously, as early as possible, within 2 weeks of surgery. Thus, factors that can facilitate early discharge from the hospital can maximize protocol adherence with respect to timing of adjuvant therapy initiation and optimize patient outcome. This study shed light on several postoperative factors and how these relate to postoperative stay and recovery. Specifically, tumor size, pre-operative bowel preparation, extent of lymph node sampling, stage, operative time, estimated blood loss, surgical service, postoperative nasogastric tube use, transfusion, and chemotherapy prior to discharge were not associated with discharge timing. Early re-feeding was associated with early discharge. Thus, it seems reasonable that, when developing a postoperative care pathway for these patients, these factors be considered and specifically encourage early re-feeding. In pediatrics, data on early recovery after surgery protocols are limited, and high-quality studies are unavailable. Within pediatric urology, early recovery after surgery protocols in children undergoing major urologic reconstruction have been shown to reduce hospital stay and can decrease complication rates. It seems reasonable that a similar pathway can be applied to children undergoing radical nephrectomy for suspected malignancy., Conclusions: For children with renal tumors who underwent radical nephrectomy, early re-feeding was associated with a shorter time to discharge. Use of bowel preparation and nasogastric tube did not appear to shorten time to discharge. These data are important for developing postoperative care pathways for these patients., (Copyright © 2018 Journal of Pediatric Urology Company. Published by Elsevier Ltd. All rights reserved.)
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- 2018
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26. Patterns of lymph node sampling and the impact of lymph node density in favorable histology Wilms tumor: An analysis of the national cancer database.
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Saltzman AF, Carrasco A Jr, Amini A, Aldrink JH, Dasgupta R, Gow KW, Glick RD, Ehrlich PF, and Cost NG
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- Adolescent, Adult, Age Factors, Aged, Analysis of Variance, Child, Child, Preschool, Databases, Factual, Disease-Free Survival, Female, Humans, Kaplan-Meier Estimate, Kidney Neoplasms surgery, Male, Middle Aged, Multivariate Analysis, Neoplasm Invasiveness pathology, Neoplasm Staging, Prognosis, Retrospective Studies, Risk Assessment, Sex Factors, Survival Analysis, United States, Wilms Tumor surgery, Young Adult, Kidney Neoplasms mortality, Kidney Neoplasms pathology, Lymph Node Excision statistics & numerical data, Lymph Nodes pathology, Wilms Tumor mortality, Wilms Tumor pathology
- Abstract
Introduction: There is controversy about the role of lymph node (LN) sampling or dissection in the management of favorable histology (FH) Wilms tumor (WT), specifically how it performed and how it may impact survival., Objective: The objective of this study was to analyze factors affecting LN sampling patterns and the impact of LN yield and density (number of positive LNs/LNs examined) on overall survival (OS) in patients with advanced-stage favorable histology Wilms tumor (FHWT)., Methods: The National Cancer Database (NCDB) was queried for patients with FHWT during 2004-2013. Demographic, clinical and OS data were abstracted for those who underwent surgical resection. Poisson regression was performed to analyze how factors influenced LN yield. Patients with positive LNs had LN density calculated and were further analyzed., Results: A total of 2340 patients met criteria, with a median age at diagnosis of 3 years (range 0-78 years). The median number of LNs examined was three (range 0-87). Lymph node yield was affected by age, race, insurance, tumor size, laterality, advanced stage, LN positivity, and institutional volume. A total of 390 (16.6%) patients had LN-positive disease. Median LN density for these LN-positive patients was 0.38 (range 0.02-1) (Summary Figure). Estimated 5-year OS was significantly improved for those with LN density ≤0.38 vs. >0.38 (94% vs. 84.6%, P = 0.012). In this population, on multivariate analysis, age and LN density were significant predictors of OS., Discussion: It is difficult to compile large numbers of cases in rare diseases like WT, and fortunately a large administrative database such as the NCDB can serve as a great resource. However, administrative data come with inherent limitations such as missing data and inability to account for a variety of factors that may influence LN yield and/or OS (specimen designation, pathologist experience, surgeon experience/volume, institutional Children's Oncology Group (COG) association, etc.). In this specific disease, the American Joint Committee on Cancer staging (captured by the NCDB) is different than the COG WT staging system that is used clinically, and the NCDB does not capture oncologic outcomes beyond OS., Conclusions: In a review of the NCDB, various factors associated with LN yield and observed LN density were identified to be significantly associated with OS in patients with LN-positive FHWT. This reinforces the need for adequate LN sampling at the time of WT surgery, to maximize surgical disease control. It was proposed that LN density as a metric may allow for improved risk-stratification, and possibly allow for therapeutic reduction in a sub-set of patients with low LN density., (Copyright © 2017 Journal of Pediatric Urology Company. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2018
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27. The Past, Present, and Future in Management of Small Renal Masses.
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Ha SC, Zlomke HA, Cost N, and Wilson S
- Abstract
Management of small renal masses (SRMs) is currently evolving due to the increased incidence given the ubiquity of cross-sectional imaging. Diagnosing a mass in the early stages theoretically allows for high rates of cure but simultaneously risks overtreatment. New consensus guidelines and treatment modalities are changing frequently. The multitude of information currently available shall be summarized in this review. This summary will detail the historic surgical treatment of renal cell carcinoma with current innovations, the feasibility and utility of biopsy, the efficacy of ablative techniques, active surveillance, and use of biomarkers. We evaluate how technology may be used in approaching the small renal mass in order to decrease morbidity, while keeping rates of overtreatment to a minimum.
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- 2015
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28. Pediatric laparo-endoscopic single site partial nephrectomy: feasibility in infants and small children for upper urinary tract duplication anomalies.
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Bansal D, Cost NG, Bean CM, and Noh PH
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- Age Factors, Child, Preschool, Cystoscopy, Feasibility Studies, Female, Humans, Infant, Male, Operative Time, Retrospective Studies, Treatment Outcome, Ureteral Obstruction diagnosis, Ureteral Obstruction etiology, Ureterocele diagnosis, Ureterocele etiology, Vesico-Ureteral Reflux diagnosis, Vesico-Ureteral Reflux etiology, Laparoscopy methods, Nephrectomy methods, Ureteral Obstruction surgery, Ureterocele surgery, Urinary Tract abnormalities, Vesico-Ureteral Reflux surgery
- Abstract
Objective: To assess the feasibility and outcomes of laparo-endoscopic single site (LESS) partial nephrectomy (PN) in infants and small children for upper urinary tract duplication anomalies., Materials and Methods: The medical records of all patients undergoing LESS PN at a single pediatric institution were retrospectively reviewed for patient demographics, perioperative details, and outcomes. A cystoscopy was initially performed to place an externalized catheter into the ureter of the ipsilateral normal renal moiety. An Olympus TriPort, an Olympus Endoeye flexible tip laparoscope, standard 3- or 5-mm instrumentation, and a LigaSure Blunt were utilized., Results: Four children (two boys, two girls) underwent LESS PN. Three patients underwent upper pole PN and one underwent lower pole PN. All procedures were performed for poorly functioning obstructed renal moieties (one ureterocele, one ureteropelvic junction obstruction and vesicoureteral reflux, and two ectopic ureters). Median age was 6.2 months (range 2.5-16.4 months). Median weight was 7.7 kg (range 6.1-12.6 kg). Median operative time was 126 min (range 97-180 min). No patient received inpatient postoperative narcotics. Median follow-up was 9.9 months (range 6.2-19.1 months). No postoperative complications were noted. Postoperative renal ultrasound demonstrated successful resection in all patients., Conclusions: LESS PN is technically feasible, safe, and effective for upper urinary tract duplication anomalies in infants and small children., (Copyright © 2014 Journal of Pediatric Urology Company. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2014
- Full Text
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29. Infant robotic pyeloplasty: comparison with an open cohort.
- Author
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Bansal D, Cost NG, DeFoor WR Jr, Reddy PP, Minevich EA, Vanderbrink BA, Alam S, Sheldon CA, and Noh PH
- Subjects
- Analgesics, Opioid therapeutic use, Cohort Studies, Female, Follow-Up Studies, Humans, Hydronephrosis diagnostic imaging, Infant, Kidney Pelvis diagnostic imaging, Kidney Pelvis physiopathology, Length of Stay, Male, Minimally Invasive Surgical Procedures methods, Operative Time, Pain, Postoperative drug therapy, Pain, Postoperative physiopathology, Postoperative Complications epidemiology, Postoperative Complications physiopathology, Retrospective Studies, Risk Assessment, Time Factors, Treatment Outcome, Ultrasonography, Hydronephrosis surgery, Kidney Pelvis surgery, Robotics, Urologic Surgical Procedures methods
- Abstract
Objective: To present our experience with infant pyeloplasty, comparing outcomes between robotic-assisted laparoscopic pyeloplasty (RALP) and open pyeloplasty (OP)., Materials and Methods: A retrospective review was performed of all children <1 year of age who underwent unilateral dismembered pyeloplasty at a single pediatric institution since January 2007. Patients with standard laparoscopic pyeloplasty were excluded. Patient demographics, intraoperative details, narcotic usage, and complications were reviewed., Results: A total of 70 infants (51 boys and 19 girls) were identified, with nine RALP and 61 OP performed. Median age was 9.2 months (range, 3.7-11.9 months) for RALP and 4.1 months (range, 1.0-11.6 months) for OP (p = 0.005). Median weight was 8 kg (range, 5.8-10.9 kg) for RALP and 7 kg (range, 4-14 kg) for OP (p = 0.163). Median operative time was 115 min (range, 95-205 min) for RALP and 166 min (range, 79-300 min) for OP (p = 0.028). Median hospital stay was 1 day (range, 1-2 days) for RALP and 3 days (range, 1-7 days) for OP (p < 0.001). Median postoperative narcotic use of morphine equivalent was <0.01 mg/kg/day (range, 0-0.1 mg/kg/day) for RALP and 0.05 mg/kg/day (range, 0-2.2 mg/kg/day) for OP (p < 0.001). Median follow-up was 10 months (range, 7.2-17.8 months) for RALP and 43.6 months (3.4-73.8 months) for OP (p < 0.001). The success rate was 100% for RALP and 98% for OP., Conclusions: Infant RALP was observed to be feasible and efficacious with shorter operative time, hospital stay, and narcotic utilization than OP., (Copyright © 2013 Journal of Pediatric Urology Company. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2014
- Full Text
- View/download PDF
30. Urothelial carcinoma at the uretero-enteric junction: multi-center evaluation of oncologic outcomes after radical nephroureterectomy.
- Author
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Youssef RF, Shariat SF, Lotan Y, Cost N, Wood CG, Sagalowsky AI, Zigeuner R, Langner C, Chromecki TF, Montorsi F, Bolenz C, and Margulis V
- Subjects
- Adult, Aged, Aged, 80 and over, Carcinoma, Transitional Cell surgery, Disease-Free Survival, Female, Follow-Up Studies, Humans, Kaplan-Meier Estimate, Male, Middle Aged, Multivariate Analysis, Neoplasm Recurrence, Local, Nephrectomy methods, Outcome Assessment, Health Care methods, Outcome Assessment, Health Care statistics & numerical data, Proportional Hazards Models, Rectum surgery, Risk Factors, Time Factors, Ureter surgery, Urologic Neoplasms surgery, Carcinoma, Transitional Cell pathology, Rectum pathology, Ureter pathology, Urologic Neoplasms pathology
- Abstract
Objective: The natural history of urothelial carcinoma arising at the uretero-enteric junction (UEJ) is poorly defined, and the data guiding clinical management of these patients is limited. Therefore, we evaluated oncologic outcomes of patients treated for urothelial carcinoma at the UEJ., Methods: Utilizing a multi-institutional database of patients treated with radical nephroureterectomy (RNU), we assessed the clinicopathologic parameters and oncologic outcomes of UEJ tumors compared with other upper tract urothelial carcinomas (UTUC). Survival analyses were performed to determine independent predictors of disease recurrence and cancer-specific mortality after RNU., Results: The study included 1,363 patients, 921 men and 442 women with 36 months median follow-up after RNU. Compared with UTUC in the kidney or ureter, UEJ tumors (n = 22) were more likely to demonstrate features of advanced disease, which were proved to be independent predictors of disease recurrence and cancer-specific mortality after RNU. The 5 year disease-free survival (DFS) and cancer-specific survival (CSS) rates were 25% and 39% in those with UEJ tumors vs. 69% and 73% in those with UTUC in the kidney or ureter (P = 0.001 and P = 0.008, respectively)., Conclusions: UEJ tumors harbor features of locally advanced disease associated with high risk of systemic recurrence and death from cancer after RNU. Our findings suggest the need for integration of systemic therapy into the management paradigm of these patients., (Copyright © 2013 Elsevier Inc. All rights reserved.)
- Published
- 2013
- Full Text
- View/download PDF
31. Testicular germ cell tumors. Current concepts and management strategies.
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Cost NG
- Subjects
- Humans, Male, Neoplasm Recurrence, Local therapy, Neoplasm Staging, Seminoma pathology, Seminoma therapy, Neoplasms, Germ Cell and Embryonal pathology, Neoplasms, Germ Cell and Embryonal therapy, Testicular Neoplasms pathology, Testicular Neoplasms therapy
- Abstract
Testicular germ cell tumors (T-GCTs) are the most common solid tumor in adolescent and young adult men. Due to the success of multidisciplinary management, the prognosis of all stages of T-GCT is quite good. The development of complimentary therapeutic strategies including modern cytotoxic chemotherapy regimens, appropriate utilization of radiotherapy, and timely surgical resection has made T-GCTs the model of a "curative" malignancy. Herein we review the background, epidemiology, and genetics of the disease, as well as an approach to its diagnosis and staging, including rationale for managing T-GCT in its various stages. In summary, while some areas in T-GCT care are debated, the vast majority of patients should be approached in a standardized manner which ensures optimal oncologic outcomes and minimal therapeutic morbidity.
- Published
- 2013
32. Analysis of risk factors for glans dehiscence after tubularized incised plate hypospadias repair.
- Author
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Snodgrass W, Cost N, Nakonezny PA, and Bush N
- Subjects
- Area Under Curve, Child, Preschool, Humans, Incidence, Infant, Logistic Models, Male, Prospective Studies, Reoperation, Risk Factors, Treatment Outcome, Hypospadias surgery, Surgical Wound Dehiscence epidemiology, Urologic Surgical Procedures, Male methods
- Abstract
Purpose: We determined the incidence of glans dehiscence and the associated risk factors after tubularized incised plate hypospadias repair., Materials and Methods: All data for patients undergoing tubularized incised plate hypospadias repair, surgical details and postoperative outcomes were prospectively maintained in databases. Data were analyzed with simple and multiple logistic regression to determine if patient age, preoperative testosterone use, meatal location (distal, mid shaft or proximal), glansplasty sutures (chromic catgut vs polyglactin) or primary vs revision tubularized incised plate procedure was associated with an increased risk of glans dehiscence., Results: Glans dehiscence occurred in 32 of 641 patients (5%). Age at surgery, preoperative testosterone use and glansplasty suture did not impact the risk of glans dehiscence. Glans dehiscence occurred in 20 of 520 distal (4%), 1 of 47 mid shaft (2%) and 11 of 74 proximal (15%) tubularized incised plate repairs, with the odds of glans dehiscence being 3.6 times higher in patients with proximal vs distal meatal location. Patients undergoing reoperative (9 of 64, 14%) vs primary tubularized incised plate (23 of 577, 4%) had a 4.7-fold increased risk of glans dehiscence., Conclusions: Proximal meatal location and revision surgery, most commonly for prior glans dehiscence, increase the odds of glans dehiscence by 3.6 and 4.7-fold, respectively, suggesting anatomical and/or host factors (wound healing) are more important than age, type of suture or preoperative testosterone use in the development of this postoperative complication., (Copyright © 2011 American Urological Association Education and Research, Inc. Published by Elsevier Inc. All rights reserved.)
- Published
- 2011
- Full Text
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33. Human balanced translocation and mouse gene inactivation implicate Basonuclin 2 in distal urethral development.
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Bhoj EJ, Ramos P, Baker LA, Garg V, Cost N, Nordenskjöld A, Elder FF, Bleyl SB, Bowles NE, Arrington CB, Delhomme B, Vanhoutteghem A, Djian P, and Zinn AR
- Subjects
- Adult, Animals, Comparative Genomic Hybridization, Female, Gene Silencing, Humans, Hypospadias pathology, Male, Mice, Urethra abnormalities, Urethra pathology, Hypospadias genetics, Translocation, Genetic
- Abstract
We studied a man with distal hypospadias, partial anomalous pulmonary venous return, mild limb-length inequality and a balanced translocation involving chromosomes 9 and 13. To gain insight into the etiology of his birth defects, we mapped the translocation breakpoints by high-resolution comparative genomic hybridization (CGH), using chromosome 9- and 13-specific tiling arrays to analyze genetic material from a spontaneously aborted fetus with unbalanced segregation of the translocation. The chromosome 13 breakpoint was ∼400 kb away from the nearest gene, but the chromosome 9 breakpoint fell within an intron of Basonuclin 2 (BNC2), a gene that encodes an evolutionarily conserved nuclear zinc-finger protein. The BNC2/Bnc2 gene is abundantly expressed in developing mouse and human periurethral tissues. In all, 6 of 48 unrelated subjects with distal hypospadias had nine novel nonsynonymous substitutions in BNC2, five of which were computationally predicted to be deleterious. In comparison, two of 23 controls with normal penile urethra morphology, each had a novel nonsynonymous substitution in BNC2, one of which was predicted to be deleterious. Bnc2(-/-) mice of both sexes displayed a high frequency of distal urethral defects; heterozygotes showed similar defects with reduced penetrance. The association of BNC2 disruption with distal urethral defects and the gene's expression pattern indicate that it functions in urethral development.
- Published
- 2011
- Full Text
- View/download PDF
34. Tubularized incised plate hypospadias repair for distal hypospadias.
- Author
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Snodgrass WT, Bush N, and Cost N
- Subjects
- Humans, Infant, Male, Prospective Studies, Hypospadias surgery, Urologic Surgical Procedures, Male methods
- Abstract
Purpose: We report surgical technique and outcomes in consecutive patients with primary distal hypospadias., Materials and Methods: A prospectively maintained database of all patients operated by WS in 2000-2008 was reviewed for pertinent data in consecutive patients., Results: A total of 551 consecutive patients of mean age 17 months underwent distal tubularized incised plate hypospadias repair by urethral plate tubularization with (459) or without (92) midline incision. Follow up occurred for 426 (77%) at a mean of 8.2 months. Calibration and/or uroflowmetry were obtained in 279 (65%). Complications developed in 19 (4%), including nine fistulas, nine glans dehiscences and one delayed meatal stenosis from balanitis xerotica obliterans. These complications could not be attributed to meatal location, urethral plate configuration or incision, suture materials or methods for urethroplasty and glansplasty, or to use or not of a dartos flap barrier layer., Conclusions: No contraindication to urethral plate tubularization with or without incision was found in 551 consecutive patients operated for distal hypospadias. Reliability of the procedure was confirmed by the low complication rate and success using varied suture materials and methods., (Copyright (c) 2009 Journal of Pediatric Urology Company. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2010
- Full Text
- View/download PDF
35. Detrusor compliance changes after bladder neck sling without augmentation in children with neurogenic urinary incontinence.
- Author
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Snodgrass W, Barber T, and Cost N
- Subjects
- Adolescent, Child, Child, Preschool, Compliance, Female, Humans, Male, Muscle, Smooth physiopathology, Prospective Studies, Urinary Bladder, Neurogenic physiopathology, Urinary Incontinence physiopathology, Urodynamics, Suburethral Slings, Urinary Bladder, Neurogenic surgery, Urinary Incontinence surgery
- Abstract
Purpose: We reviewed preoperative, and initial and final postoperative urodynamic testing in consecutive children undergoing bladder neck sling without augmentation for neurogenic urinary incontinence to determine if progressive loss of compliance occurs., Materials and Methods: We assessed consecutive patients with neurogenic outlet incompetence who underwent 360-degree tight fascial wrap around the bladder neck with appendicovesicostomy but no augmentation. This population comprised all patients undergoing outlet surgery between 2002 and 2007. Inclusion criteria were initial urodynamic test within 1 year postoperatively and final urodynamic test at least 18 months postoperatively., Results: A total of 26 patients met inclusion criteria. Most patients (73%) had an acontractile bladder with detrusor pressures less than 25 cm H(2)O preoperatively. Initial postoperative urodynamic test at a mean of 7 months was most predictive of subsequent urodynamic findings. Eight patients (31%) had increased detrusor pressures and/or uninhibited contractions postoperatively. Six patients increased anticholinergic therapy dose. At a mean of 39 months urodynamic patterns were either stable or improved in all patients., Conclusions: Progressive compliance loss was not observed after bladder neck sling without augmentation. Postoperative increases in detrusor pressure and/or uninhibited contractions within 1 year postoperatively should prompt review of anticholinergic therapy rather than enterocystoplasty., (Copyright 2010 American Urological Association Education and Research, Inc. Published by Elsevier Inc. All rights reserved.)
- Published
- 2010
- Full Text
- View/download PDF
36. Algorithm for comprehensive approach to hypospadias reoperation using 3 techniques.
- Author
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Snodgrass WT, Bush N, and Cost N
- Subjects
- Adolescent, Adult, Child, Child, Preschool, Humans, Infant, Male, Prospective Studies, Reoperation, Young Adult, Algorithms, Hypospadias surgery, Mouth Mucosa transplantation, Skin Transplantation, Surgical Flaps, Urologic Surgical Procedures, Male methods
- Abstract
Purpose: We describe comprehensive hypospadias reoperation based on presence or absence of a supple urethral plate using the 3 surgical techniques of transurethral incised plate, 1-stage inlay graft and 2-stage buccal graft., Materials and Methods: We reviewed prospective data from all reoperative hypospadias urethroplasties performed by one of us (WTS) between 2000 and 2008. Patient age, number of operations, indications for additional surgery, meatal location, reoperative surgical technique and outcomes were extracted., Results: A total of 133 patients underwent reoperation by transurethral incised plate (69), 1-stage inlay graft (16) or 2-stage buccal graft (48) urethroplasty. Mean number of prior failed repairs was 1.1, 1.9 and 4.3, respectively. Followup was available in 121 patients (91%), with 90 (74%) undergoing 1 successful reoperative urethroplasty. Complications occurred in 19%, 15% and 38% of patients, respectively, and most often consisted of fistulas or glans dehiscence., Conclusions: Hypospadias reoperation can be accomplished using these 3 techniques without skin flaps, a potential advantage given the relative paucity of skin after failed repair. Fistulas after transurethral incised plate urethroplasty correlate with barrier layers used, while glans dehiscence is more likely in 2-stage buccal graft repairs when cheek rather than lip is used within the glans.
- Published
- 2009
- Full Text
- View/download PDF
37. Radiofrequency ablation of small renal cortical tumours in healthy adults: renal function preservation and intermediate oncological outcome.
- Author
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Stern JM, Gupta A, Raman JD, Cost N, Lucas S, Lotan Y, Raj GV, and Cadeddu JA
- Subjects
- Adult, Aged, Aged, 80 and over, Carcinoma, Renal Cell pathology, Carcinoma, Renal Cell physiopathology, Dihydrolipoamide Dehydrogenase metabolism, Female, Humans, Kidney Neoplasms pathology, Male, Middle Aged, Neoplasm Recurrence, Local, Retrospective Studies, Treatment Outcome, Young Adult, Carcinoma, Renal Cell surgery, Glomerular Filtration Rate physiology, Kidney physiology, Kidney Neoplasms surgery
- Abstract
Objectives: To present the glomerular filtration rate (GFR) and oncological outcomes in a series of patients with cT1a renal cortical tumours treated with radiofrequency ablation (RFA), a non-ischaemic minimally invasive ablative method, as nephron-sparing surgery gives excellent oncological outcomes and preserves renal function., Patients and Methods: Healthy (American Society of Anesthesiologists, ASA, I and II) patients with cT1a renal masses were identified, and clinical and radiographic data were reviewed to assess indications, complications, radiological evidence of disease recurrence, and renal function. Changes in GFR were calculated. Radiological recurrence was defined as any new enhancement (>10 Hounsfield units) after absence of enhancement on initial 6-week computed tomography., Results: Four patients were ASA I and 59 were ASA II; the median (range) age was 58 (20-84.6) years and the lesion diameter 2.1 (1-4.0) cm. Preoperative needle biopsy was diagnostic in 89% of patients, including 75% diagnostic of renal cell carcinoma (RCC). At a median (range) follow-up of 34 (1.0-80) months the renal preservation rate was 97%. One patient had a nephrectomy for biopsy-confirmed recurrence of RCC at 55 months; a second had a nephrectomy at 24 months for suspected radiographic recurrence, but had no evidence of disease on final pathology. A fifth (20%) of the patients had chronic kidney disease at the time of diagnosis. The median GFR before and after RFA was 76.3 and 74.3 mL/min/m(2) (difference 2.0 mL/min/m(2))., Conclusion: RFA might be a reasonable treatment choice for the healthy patient, with appropriate informed consent. Intermediate results suggest excellent oncological outcomes and preservation of renal function.
- Published
- 2009
- Full Text
- View/download PDF
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