Mehmet Kaynar

Konya Training and Research Hospital, Conia, Konya, Turkey

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Publications (13)22.94 Total impact

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    ABSTRACT: To determine the relationship between renal cell carcinoma subtypes and the associated mortality and biochemical parameters. An additional aim was to analyze multiphasic multidetector computed tomography findings. This study is a hospital-based retrospective investigation, using 211 patients with a diagnosis of renal cell carcinoma upon computed tomography examination. The histological subtypes included clear cell in 119 patients, chromophobe cell in 30 patients, papillary cell in 25 patients, mixed cell in 32 patients, and sarcomatoid cell in 4 patients. The mean age of the patients participating in this study was 61.18 +/- 11.81 years, and the mortality rate was 10.4% (n = 22) through the 2-year follow-up. The ratios of both the neutrophil-to-lymphocyte upon admission to the hospital and platelet-to-lymphocyte of the non-surviving group were significantly higher than those of the surviving group (p < 0.05). When the analysis of the 2-year survival of the patients was examined according to the median platelet-to-lymphocyte ratio values, the Kaplan-Meier survival curves were significantly different between the surviving and non-surviving groups (p = 0.01). In two-way analysis of variance test, statistically significant results which were influenced by mortality (p = 0.028) and were found between renal cell carcinoma subtypes in the computed tomography density of corticomedullary phase (p = 0.001). The neutrophil-to-lymphocyte ratio and platelet-to-lymphocyte ratio may represent widely available biomarkers in renal cell carcinoma, and the logistic regression model indicated that neutrophil-to-lymphocyte ratio was a significant predictor for mortality. According to the median platelet-to-lymphocyte ratio values, the Kaplan-Meier survival curves were significantly different between the surviving and non-surviving groups.
    BMC Urology 11/2014; · 1.94 Impact Factor
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    ABSTRACT: An increased pretreatment neutrophil-lymphocyte ratio (NLR) is associated with poor prognosis in colorectal, gastric, and ovarian cancer; malignant mesothelioma; and renal cell carcinoma. The present study aims to define the predictive value of preoperative peripheral blood count NLR in non-muscle-invasive bladder cancer (NMIBC) and muscle-invasive disease (MIBC) patients. There were in total 291 patients, 241 males and 50 females. Out of these, 156 male and 36 female patients were in the NMIBC group and 85 male and 14 female patients in the MIBC group. In the NMIBC group, 172 patients had low-grade and 20 high-grade papillary urothelial carcinoma. The mean age of the patients in the NMIBC group was 64 ± 13, ranging from 27 to 97. The mean age of the patients in MIBC group was 70.5 ± 10, ranging from 27 to 95. A statistically significant relation between patient ages and tumor invasiveness was determined (p = 0.023, 95 % confidence interval (CI) 63.3-66.7). The mean tumor size of the NMIBC group was 2.1 ± 1.09 (cm) (range 0.5-8), and of MIBC group 3.6 ± 1.5 (cm) (range 0.8-9). There was a statistically significant relation between the tumor size and invasiveness (p = 0.002, 95 % CI 2.8-4.4). In the NIMBC group, 149 (77.6 %) of them have NLR ≤ 2.5 and 43 (22.4 %) have NLR > 2.5. Also, in MIBC, 67 (67.7 %) of them have NLR ≤ 2.5 and 32 (32.3 %) have NLR > 2.5. The mean NLR in the NMIBC group was 2.4 ± 0.1 (range 0.08-6.49, 95 % CI 1.52-2.71) and in the MIBC 2.9 ± 0.2 (range 0.08-16.72, 95 % CI 1.67-2.97). In terms of NLR, there was a statistically significant difference between the NMIBC and MIBC groups (p = 0.028). Platelet-lymphocyte ratio (PLR) of the two groups was also analyzed. The PLR of the NMIBC group was 12.8 ± 15.1 (range 3.38-19.1) and of the MIBC 13.6 ± 8.78 (range 0.18-63), yet there was not any statistically significant difference (p = 0.810, 95 % CI 11.4-14.8) (Table 1). The correlation tests revealed a positive correlation between the age (r = 0.144, p = 0.024), tumor size (r = 0.193, p = 0.02), and tumor invasiveness NLR (r = 0.138, p = 0.031). NLR can be used to determine tumor invasiveness as a cost-effective, common, and simple biomarker in bladder cancer (BC).
    Tumor Biology 04/2014; · 2.84 Impact Factor
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    ABSTRACT: Testicular adrenal rest tumors (TART) occur often as asymptomatic nodules in corticotropin-dependent lesions aberrant adrenal tissue in congenital adrenal hyperplasia (CAH) patients. The present manuscript is about an unusual case of a 16-year-old CAH patient due to 11β-hydroxylase deficiency. He underwent testicle biopsy because of testicle tumor suspicion and diagnosed with TART.
    Korean journal of urology 04/2014; 55(4):292-4.
  • European Urology Supplements 10/2013; 12(4):e1225, S117. · 3.37 Impact Factor
  • European Urology Supplements 10/2013; 12(4):e1113, S5. · 3.37 Impact Factor
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    ABSTRACT: This paper presents the use of the single-step micropercutaneous nephrolithotomy (microperc) procedure for the treatment of a 13-mm renal stone using a 4.85-Fr 'all-seeing needle' in a 2-year-old toddler. In the current literature to date, this is the youngest case. Moreover, the advantages and reliability of this technique in toddler renal stone treatment are also evaluated.
    Urologia Internationalis 01/2013; · 1.15 Impact Factor
  • Mehmet Kaynar, Ozcan Kilic, Talat Yurdakul
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    ABSTRACT: To determine the efficacy of tramadol in premature ejaculation (PE) treatment compared with placebo. A single-blind, placebo-controlled, crossover study was conducted with 60 lifelong (primary) patients with PE. The patients were randomized into 2 groups, each consisting of 30 patients, who took tramadol or placebo on demand. PE was defined as an intravaginal ejaculation latency time of ≤60 seconds in 90% of intercourse episodes. The efficacy of the drugs was assessed using the intravaginal ejaculation latency time, ability of ejaculation control, and sexual satisfaction scores after an 8-week treatment period. All participants completed the study voluntarily. Two groups were similar in terms of the patient demographics. Increases in the intravaginal ejaculation latency time, ability of ejaculation control, and sexual satisfaction score between the placebo and tramadol groups were compared with the baseline values in both groups. At the end of study period, the tramadol group had significantly (P<.001) greater values for all 3 parameters compared with those in the placebo group. On-demand use of low-dose tramadol is effective for lifelong PE. Currently, selective seratonin reuptake inhibitors such as dapoxetine, are a more popular treatment option for PE. However, tramadol might be considered an alternative agent for primary PE treatment.
    Urology 11/2011; 79(1):145-9. · 2.13 Impact Factor
  • European Urology Supplements 03/2011; 10(2):131-131. · 3.37 Impact Factor
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    ABSTRACT: Purpose We described our ureteroscopic pneumotic lithotripsy experience with uretric stones in preschool age children. Material and Methods We retrospectively reviewed the records of 24 children 1 to 6 years old who underwent ureteroscopic lithotripsy at our institution between January 2005 and July 2009. Patient age and gender, localization of calculi, surgical procedures, surgical outcomes and complications were recorded. All procedures were performed under general anesthesia using 8 Fr semi-rigid uretereoscopy. Stones were fragment with a pneumatic lithotriptor. Results Nine female, 15 male, totally 24 children review in this study. The mean age of the patients was 3,2 years. Mean stone size was 7.7 mm. Stone localisations were proximal ureter in 4(16.6%) and distal ureter in (83.4)%. Balloon dilatation was performed in only one patient that was 1 year old age in rest hydrolicdilatation was used. In all patients the stones were fragmented during the operation; the stone fragments were extracted with triceps basket. 22 of the 24 patients were stone-free after a one-stage procedure (92 %) within 4 weeks after the procedure; a further procedure in the remaining one of two patients the success rate was 96% (23/24). In two patients ureter was perforated and mucosal tear was seen in one. Conclusions Ureteroscopic lithotripsy is effective in also preschool age children.
    Journal of Pediatric Urology 04/2010; 6. · 1.41 Impact Factor
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    ABSTRACT: Partial priapism is also called partial segmental thrombosis of the corpus cavernosum. It is a rare pathology, and its aetiology, physiopathology and treatment are still not completely understood. To our knowledge, partial priapism due to alpha blockers has not been reported previously in the literature. In this study, a successfully treated case of partial priapism occurring after the usage of alpha blocker is presented and discussed in light of the related literature.
    Andrologia 07/2009; 41(3):199-201. · 1.17 Impact Factor
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    ABSTRACT: In this case report, the procedure of penis replanting and its complications after genital self-mutilation in a male adult are explained.
    International Urology and Nephrology 07/2008; 41(1):109-11. · 1.29 Impact Factor
  • Urology 09/2007; 70(3):277-277. · 2.13 Impact Factor
  • Urology 09/2007; 70(3):279-279. · 2.13 Impact Factor