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Featured researches published by Önder Yaman.


Urology | 2000

Effect of microsurgical subinguinal varicocele ligation to treat pain

Önder Yaman; Erol Özdi̇ler; Kadri Anafarta; Orhan Göğüş

OBJECTIVES The traditional treatment for a painful varicocele consists of conservative measures followed by varicocelectomy. We report our results with microsurgical subinguinal varicocele ligation to treat pain. METHODS From 1996 to 1999, a total of 119 men underwent subinguinal microsurgical varicocele ligation for painful varicocele. The diagnosis of varicocele was based on the findings of both physical examination and color Doppler ultrasound. Patients described pain with testicular discomfort as scrotal heaviness or a dull ache. While waiting for the operation (range 3 to 5 weeks), all the patients underwent a preoperative trial of conservative management for pain. RESULTS Of 119 men, 82 (69 %) were available for follow-up 3 months postoperatively. Of those 82 patients, 72 (88%) reported complete resolution of pain, 4 patients (5%) partial resolution, 5 patients (6%) no change, and 1 patient (1%) epididymal discomfort that resolved with conservative measures. Of the 9 patients with partial or no change, 2 patients had reflux recurrence as seen on color Doppler ultrasound. CONCLUSIONS Subinguinal microsurgical varicocele ligation is an effective treatment for painful varicocele when performed in selected patients.


The Journal of Sexual Medicine | 2011

Prevalence of the Complaint of Ejaculating Prematurely and the Four Premature Ejaculation Syndromes: Results from the Turkish Society of Andrology Sexual Health Survey

Ege Can Serefoglu; Önder Yaman; Selahittin Çayan; Ramazan Asci; Irfan Orhan; Mustafa F. Usta; Oguz Ekmekcioglu; Muammer Kendirci; Bülent Semerci; Ates Kadioglu

INTRODUCTION In addition to the previously known lifelong and acquired premature ejaculation (PE) syndromes, the existence of two more PE syndromes has been suggested: natural variable PE and premature-like ejaculatory dysfunction. However, epidemiological studies investigating the prevalence of these four PE syndromes have yet to be conducted. AIM To determine the prevalence of the complaint of ejaculating prematurely across the four PE syndromes. METHODS This study, conducted between June 2009 and December 2009, was designed as a non-interventional, observational cross-sectional field survey. Participating couples were randomly selected from 17 provinces of Turkey. All participants were asked to complete a questionnaire including data regarding demographics, socioeconomic status, social and cultural factors, medical and sexual history, current medications, and ejaculation time. Subjects with a complaint of ejaculating prematurely were classified as lifelong, acquired, and natural variable PE, or premature-like ejaculatory dysfunction. MAIN OUTCOME MEASURES The main outcome measures were prevalence of complaint of ejaculating prematurely in the general population and across the four PE syndromes. RESULTS A total of 2,593 couples (mean age, 41.9±12.7 years for males and 38.2±12.1 years for females) were enrolled. Five-hundred twelve subjects (20.0%) complained of ejaculating prematurely. Fifty-eight (2.3%), 100 (3.9%), 215 (8.5%), and 131 (5.1%) subjects were classified as lifelong, acquired, and natural variable PE, and premature-like ejaculatory dysfunction, respectively. CONCLUSIONS The prevalence of the complaint of ejaculating prematurely among Turkish men was 20.0%, with the highest PE syndrome being natural variable PE (8.5%) and premature-like ejaculatory dysfunction (5.1%).


Urologia Internationalis | 2003

Alterations of Intracorporeal Structures in Patients with Erectile Dysfunction

Önder Yaman; Erdal Yilmaz; Murat Bozlu; Kadri Anafarta

Objective: We sought to quantify intracavernosal smooth muscle content (SMC), endothelial cells (EC) and elastic fibres (EF) in both potent and impotent men. We compare the results in impotent men with regard to patient age, aetiology of impotence, presence or absence of diabetes mellitus and smoking. Patients and Methods: Seventy penile biopsies were taken from 10 potent patients with congenital penile curvature (age 17–24 years, mean: 21 ± 1.16) and from 60 impotent patients (age 28–64 years, mean: 46 ± 7.64). Biopsies were stained immunohistochemically to quantify the percentage of SMC by anti-desmin and anti-SMA, anti-CD-34 for EC and Verhoeff’s histochemical staining for EF. Statistical analyses were performed by using one-way Anova after square root transformation. Results: We observed a statistically significant difference in the amounts of corporeal SMC, EC and EF with regard to the following subgroups: potent versus impotent men; men with arterial aetiology versus veno-occlusive aetiology; men under the age of 45 versus men over the age of 45; patients with diabetes mellitus versus non-diabetes mellitus, and smokers versus non-smokers. Conclusion: Quantification of intracavernosal structures appears to be important for either understanding the mechanism of impotence or deciding the appropriate treatment.


Urology | 2008

Open prostatectomy is still a valid option for large prostates: a high-volume, single-center experience.

Evren Süer; İlker Gökçe; Önder Yaman; Kadri Anafarta; Orhan Göğüş

OBJECTIVES To evaluate, in a retrospective, single-center trial, our open prostatectomy outcomes and complications in the past 12 years to emphasize the feasibility of open prostatectomy for large prostates. METHODS A total of 1193 patients underwent open prostatectomy from 1995 to 2007. We retrospectively analyzed the data from 664 patients who had preoperative, operative, and postoperative data available. RESULTS The mean patient age was 67.5 years (range 52-86). The mean preoperative prostate-specific antigen value was 9.6 ng/mL (range 1.65-45.6). The mean prostatic weight was 88.7 g (range 45-324) and was significantly different for the 1995-2001 and 2002-2007 groups (73.6 vs 98.2 g, respectively). Of the 664 patients, 208 (31%) had had an indwelling catheter before surgery. The average International Prostate Symptom Score was 21.7 (range 13-32) preoperatively and 10.6 (range 8-18) postoperatively (P <.005). The average hospitalization was 6.74 days (range 4-14). Blood transfusion was required in 12.7% of the patients either intraoperatively or postoperatively. Postoperatively, 82 patients (12.3%) had urinary tract infections, 22 (3.2%) had bladder neck obstruction, 5 (0.7%) had urinary incontinence, and 15 (2.3%) had a ureteral meatus stricture. CONCLUSIONS Open prostatectomy is a feasible treatment option for patients with a large prostate and also for patients with additional bladder pathologic findings such as bladder calculi or diverticula for whom endoscopic treatment modalities are not appropriate. Consequently, open prostatectomy is still the primary option for patients with a prostate greater than 100 cm(3) and preserves its importance in urology practice, even in the presence of endoscopic innovations.


Urologia Internationalis | 2002

Urological Complications in Renal Transplantation: Long-Term Follow-Up of the Woodruff Ureteroneocystostomy Procedure in 433 Patients

Çağatay Göğüş; Önder Yaman; Tarkan Soygür; Yaşar Bedük; Orhan Göğüş

Purpose: The two major types of urologic problems after renal transplantation are urinary leakage and obstruction. In this study, we report the urological complications of renal transplantations performed in our hospital during a 22-year period. Patients and Methods: Between 1978 and 2000, 433 consecutive patients underwent renal transplantation. Of those transplants, 50 were cadavers and 383 were living-related donor transplantation. All ureteroneocystostomies were performed with the same technique described by Woodruff. Results: Urological complications developed in 19 (4.23%) recipients. Those complications were urinary leakage in 9 (2%), ureteral obstruction in 9 (2%) and ureteral necrosis in 1 patient (0.23%). All complications occurred during the 6-month postoperative period and after re-operation or conservative management no graft or patient was lost due to urological complications. Conclusion: The quoted overall rate of urological complications varies from 2.9 to 12.5%; our complication rate was 4.23%. This relatively low rate is probably due to the Woodruff ureteroneocystostomy technique.


Urologia Internationalis | 2003

Increased Prostate-Specific Antigen in Subclinical Prostatitis: The Role of Aggressiveness and Extension of Inflammation

Önder Yaman; Çağatay Göğüş; Özden Tulunay; Zafer Tokatli; Eriz Özden

Objectives: Subclinical prostatitis is a very frequent histologic finding in pathological examinations of prostate biopsy and prostate surgery material. In this study, we tried to investigate the correlation between the morphological parameters of histological prostatitis and total serum prostate-specific antigen (PSA)-PSA density (PSAD) to determine if either the extent or aggressiveness of inflammation might affect serum PSA. Methods: 269 patients who had undergone TURP or transvesical prostatectomy with pathological diagnosis of BPH and prostatitis were included in the study. We retrospectively reviewed and scored the extent and aggressiveness of inflammation in prostate specimens of BPH, according to the scale that has been reported by Irani et al. and then correlated those scores with PSA and PSAD. Results: When the inflammation grades correlated with PSA and PSAD, the extent of the inflammation did not show a significant correlation with total PSA and PSAD (p > 0.05). However, there was a statistically significant correlation between aggressiveness grades and total PSA and PSAD (p < 0.001). Median PSA levels in grades 0, 1 and 2 of aggressiveness of inflammation were 3.2, 4.2 and 5.8 respectively. Conclusion: Aggressiveness grade of the inflammation in subclinical prostatitis is the most important morphological factor that is responsible for PSA elevation. We believe that it should be a more accurate guide for the clinician if pathologists report on the aggressiveness grades of the inflammation, especially on initial prostate biopsies, in order to help for timing of the further biopsy.


Urologia Internationalis | 2004

Long-Term Results of Anderson-Hynes Pyeloplasty in 180 Adults in the Era of Endourologic Procedures

Çağatay Göğüş; Tamer Karamürsel; Zafer Tokatli; Önder Yaman; Erol Özdiler; Orhan Göğüş

Introduction: The aim of the present study wasto evaluate the long-term results of adult open pyeloplasties performed by the Anderson-Hynes technique in the era of new endourologic procedures. Materials and Methods: The medical records of 180 adult patients who underwent Anderson-Hynes pyeloplasty with a diagnosis of ureteropelvic junction (UPJ) obstruction, were retrospectively reviewed. Pre- and postoperative results were compared with clinical, radiologic and radionuclide studies. The mean age of the patients was 33.2 (16–65) years. The minimum clinical follow-up time was 12 months and the mean time from the operation was 9.4 years (between 1 and 17 years). Results: Success was defined as resolution of symptoms and decrease in pyelocaliceal volume and calicectasis. The overall success rate was 91.1%. The success rate was between 93.1 and 100% in patients with grades I–III and 62.5% in patients with grade IV hydronephrosis and contribute to renal function less than 25%. The pyelocaliceal volume returned to normal in 39 (21.7%) patients, significantly decreased in 82 (45.5%), and the flow of contrast media from renal pelvis to ureter improved in 43 (23.9%) and did not change or increased in 16 (8.9%). The failure happened in the first 3 months in 57% of patients and in long-term follow-up in 43% of patients. Conclusion: Despite newer endoscopic techniques, Anderson-Hynes pyeloplasty, with an over 90% success rate remains the gold standard in the treatment of primary UPJ obstruction.


Urologia Internationalis | 1996

Evaluation of Ischemia after ESWL: Detection of Free Oxygen Radical Scavenger Enzymes in Renal Parenchyma Subjected to High-Energy Shock Waves

Kemal Sarica; Alim Koşar; Önder Yaman; Yaşar Bedük; I. Durak; Orhan Göǧ; Mustafa Kavukçu

To evaluate the degree of ischemic formation at the tissue level after high-energy shock wave (HESW) application in a time- and dose-dependent manner, an experimental study in rabbits was performed. Following varying numbers of HESWs (1,000-2,000-3,000 shock waves) under fluoroscopic localization, treated kidneys were removed, by assessing tissue concentrations of two different free-radical scavenger enzymes (superoxide dismutase and catalase) the degree of formation of free oxygen radicals (i.e. ischemia) was evaluated. Evaluation of our results showed a statistically significant (p < 0.05) decrease in tissue scavenger enzyme levels (i.e. formation of free oxygen radicals) after 24 h following HESW application. However, results obtained 7 days after ESWL demonstrated disappearance of ischemia with normalization of tissue enzyme levels (p > 0.05).


Urology | 2001

Effect of experimental hypercholesterolemia on cavernosal structures.

Çetin Yeşilli; Önder Yaman; Kadri Anafarta

OBJECTIVES To determine the effect of experimental hypercholesterolemia on the ultrastructure of cavernosal smooth muscle cells, endothelial cells, elastic fibers, and collagen content, which are the key structures fundamental for erection. METHODS Forty-two New Zealand white rabbits were divided into a control group (group 1, n = 7, fed a standard diet), a hypercholesterolemia group (group 2, n = 20, fed a diet containing 1% cholesterol for 8 weeks), and a reversibility group (group 3, n = 15, fed a 1% cholesterol diet for 8 weeks, then switched to a standard diet for 4 weeks). Blood samples were obtained for lipid determination before and after the study. The cavernosal tissues were obtained at the end of 8 weeks for groups 1 and 2 and at the end of 12 weeks for group 3 and immunohistochemical examinations of these cells were performed. RESULTS Immunohistochemical analysis revealed that hypercholesterolemia produces marked and reversible decreases in the cavernosal content of smooth muscle cells, endothelial cells, and elastic fibers and increases the content of collagen 3 and 4. CONCLUSIONS Our findings suggest that hypercholesterolemia in this animal model affects the percentage of staining for smooth muscle actin, endothelial cells, elastin, and collagen 3 and 4. However, since this effect is temporary depending on the blood cholesterol levels, it might not alter the erectile function.


International Braz J Urol | 2011

Tadalafil rehabilitation therapy preserves penile size after bilateral nerve sparing radical retropubic prostatectomy

Ozgu Aydogdu; Mehmet İlker Gökçe; Berk Burgu; Sümer Baltaci; Önder Yaman

OBJECTIVE To evaluate the change in penile size r bilateral nerve sparing retropubic radical prostatectomy (BNSRRP) and possible effect of Tadalafil. MATERIALS AND METHODS A total of 65 patients underwent BNSRRP and they were evaluated prospectively for a whole year of follow-up. The patients were randomized to control without rehabilitation (Group 1) or Tadalafil rehabilitation group (Group 2). The patients were evaluated at months 3, 6 and 12 postoperatively for erectile function, penile measurements (flaccid penile length, penile length at maximum erection, penile circumference at flaccid status, and penile circumference at maximum erection), penile abnormalities and general health status. Statistical analysis was performed by Chi-Square test and significance was defined as p value < 0.05. RESULTS In Group 1 there was significant decrease in penile measurements at month 3 compared to preoperative measurements. There was decrease in all parameters at month 6 compared to month 3 but only the decrease in penile length at maximum erection was significant. There were no significant differences between postoperative months 6 and 12 for all measurements. In Group 2 there was a tendency to decrease in all measurements at month 3 compared to baseline. There was no significant difference for penile measurements between postoperative 3rd and 6th months and between 6th month and the first year. CONCLUSION Although further large sampled trials are needed to describe the possible positive effect of tadalafil or other PDE5-I s on penile size after BNSRRP, tadalafil rehabilitation is effective in preserving penile size especially in the early postoperative period after BNSRRP.

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