Person: AKÇAY, MUZAFFER
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Publication Metadata only The Role of Microperc in the Treatment of Symptomatic Lower Pole Renal Calculi(2013-01-01T00:00:00Z) TEPELER, Abdulkadir; ARMAGAN, Abdullah; Sancaktutar, Ahmet Ali; SILAY, Mesrur Selcuk; Penbegul, Necmettin; AKMAN, Tolga; Hatipoglu, Namik Kemal; Ersoz, CEVPER; ERDEM, Mehmet Remzi; Akcay, MUZAFFER; ERSÖZ, CEVPER; AKÇAY, MUZAFFERBackground and Purpose: The treatment of symptomatic lower pole (LP) calculi poses a challenge because of lower clearance rates. We present our experience with microperc in the treatment of LP renal calculi.Publication Open Access Comparison of Scoring Systems in Predicting Success of Percutaneous Nephrolithotomy(2019-01-01T00:00:00Z) AKÇAY, MUZAFFER; Tosun, Muhammed; GEVHER, FATİH; KALKAN, Senad; ERSÖZ, CEVPER; Kayali, Yunus; Tepeler, Abdulkadir; AKÇAY, MUZAFFER; TOSUN, MUHAMMED; GEVHER, FATİH; KALKAN, SENAD; ERSÖZ, CEVPER; KAYALI, YUNUSBackground: Scoring systems are useful to inform the patients about the success and complication rates of the operation prior the surgery. Aims: To determine the applicability of the popular scoring systems (Guy’s, stone size, tract length, obstruction, number of involved calices, and essence/stone density and Clinical Research Office of the Endourological Society) by means of examining preoperative data of patients treated with percutaneous nephrolithotomy. Study Design: Cross sectional study. Methods: We retrospectively reviewed files of the patients who had undergone percutaneous nephrolithotomy in our center between 2011 and 2015. Excluded from the study were patients aged <18 years, and those who were not assessed preoperatively with computed tomography. Preoperative computed tomography images of all patients were assessed by a single observer, and patients were graded based on three scoring system. Demographic data were analyzed along with perioperative data (operation, fluoroscopy, length of hospital stay, changes in hematocrit values, location, and number of access sites, stone-free and complication rates). Results: A total of 298 patients who had been treated with 300 procedures were enrolled into the study. Mean age, stone burden, number of stones, and density were 48.1±12.9 years, 663.5±442.8 mm2, 1.8±1.1 and 888.3±273 HU respectively. Scores of the cases based on Guy’s, stone size, tract length, obstruction, number of involved calices, and essence/stone density, and Clinical Research Office of the Endourological Society scoring system were calculated as 2, 7.6, and 222.1 points respectively. 81.6% of the patients were stonefree. Complications were detected in 30 (9.9%) patients. Based on receiver operating characteristic curve analysis a positive correlation was detected between success rate and scoring systems, i.e., Guy’s (p=<0.001, r=-0.309), stone size, tract length, obstruction, number of involved calices, and essence/stone density (p=<0.001, r=-0.295), and Clinical Research Office of the Endourological Society (p=<0.001, r=0.426). The Clinical Research Office of the Endourological Society scoring system had the highest predictive value. The sensitivity rates rates for Guy’s, Clinical Research Office of the Endourological Society and Stone scoring system were as 78.78%, 80% and 82.34% respectively. Conclusion: All of scoring systems predicted correctly the success of the percutaneous nephrolithotomy procedures. The Clinical Research Office of the Endourological Society scoring system had the highest predictive value. Keywords: Percutaneous nephrolitotomy, scoring methods, specificity and sensitivity, urinary calculiPublication Metadata only Micropercutaneous Nephrolithotomy in the Treatment of Moderate-Size Renal Calculi(2013-02-01T00:00:00Z) ARMAGAN, Abdullah; TEPELER, Abdulkadir; SILAY, Mesrur Selcuk; Ersoz, CEVPER; Akcay, MUZAFFER; AKMAN, Tolga; ERDEM, Mehmet Remzi; ONOL, Sinasi Yavuz; ERSÖZ, CEVPER; AKÇAY, MUZAFFERPurpose: We present our initial experience with microperc in patients with moderate-size renal calculi.Publication Metadata only Laparoscopic Decortication of Hilar Renal Cysts Using LigaSure(2014-04-01T00:00:00Z) Erdem, Mehmet Remzi; Tepeler, Abdulkadir; Gunes, Mustafa; Silay, Mesrur Selcuk; Akman, Tolga; AKÇAY, MUZAFFER; Armagan, Abdullah; Onol, Sinasi Yavuz; AKÇAY, MUZAFFERBackground and Objectives: In this study, we evaluated the safety and efficacy of using the LigaSure sealing system (Valleylab, Boulder, Colorado) for laparoscopic decortication of symptomatic hilar renal cysts.Publication Open Access General Overview of Renal Cell Carcinoma with the Evaluation of our cases(2015-12-01) Yildiz, PELİN; Sonmez, FATMA CAVİDE; Buyukpinarbasili, NUR; Gucin, ZÜHAL; Arici, DİLEK SEMA; KOCAKOC, Ercan; Akcay, MUZAFFER; YILDIZ, PELİN; SÖNMEZ, FATMA CAVİDE; BÜYÜKPINARBAŞILI, NUR; GÜCİN, ZÜHAL; ARICI, DILEK SEMA; AKÇAY, MUZAFFERObjective: Renal cell carcinoma (RCC) is the 14th most common tumor in the world. In 2010, the protocol for the examination of kidney specimens with invasive carcinoma of renal tubular origin was updated. The aim of our study was to review 1-year RCC patients of our hospital according to the new protocol, classification, and staging systems with respect to their morphological and immunohistochemical features.. Methods: The medical records of 54 RCC patients between July 2012 and July 2013 were retrospectively reviewed. They were classified according to the WHO 2004 classification system and newly defined subtypes. The following variables were determined in each case: age, sex, histological subtype, stage, and Fuhrman nuclear grade. Results: In our study, 30 (55.6%) men and 24 (44.4%) women were diagnosed with RCC out of 54 patients. The median age was 56 years. In total, 21 patients had (55.2%) right-and 17 had (44.74%) left-sided tumors. Thirty-eight (70.3%) clear cell, 6 (11.1%) papillary, 7 (12.96%) chromophobe, 1 (1.85%) multilocular, 1 (1.85%) unclassified, and 1 (1.85%) tubulocystic RCC were seen. According to primary tumor, 33 (61.1%) pT1, 10 (18.51%) pT2, 9 (16.66%) pT3, and 2 (3.70%) pT4 patients were reported. Chromophobe RCCs were excluded from the Fuhrman grading (G) system; of the remaining 2 (4.17%) were G1, 30 (62.5%) were G2, 13 (27.08%) were G3, and 3 (6.25%) were G4 tumors. Conclusion: Although RCC constitutes the majority of renal tumors, different subtypes are also encountered. In our study, clear cell RCCs were the most common type of tumors consistent with the literature. The remarkable point was that chromophobe RCCs were more frequent in our study. Because of infrequency, more examples are required to distinguish newly defined subtypes.