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Dive into the research topics where Yakup Kordan is active.

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Featured researches published by Yakup Kordan.


International Journal of Urology | 2007

Association of vitamin D receptor gene Taq I polymorphism with recurrent urolithiasis in children

Serkan Seyhan; Ismet Yavascaoglu; Hakan Kilicarslan; Hasan Serkan Dogan; Yakup Kordan

Objective:  Urolithiasis has a strong familial component. However, to date, no specific genetic abnormality has been identified. It has been reported that allelic variation in the vitamin D receptor (VDR) gene may affect calcium absorption and excretion. Urolithiasis is a multifactorial disease in which both genetic and environmental factors have an effect on onset and severity of disease. In the present study, the role of Taq I polymorphism of vitamin D receptor gene in urolithiasis was studied.


Urologia Internationalis | 2010

Single-Port Extraperitoneal Transvesical Adenomectomy: Initial Operative Experience

Bulent Oktay; Hakan Vuruskan; Gokhan Koc; Mahmut Esad Danisoglu; Yakup Kordan

Background: Laparoscopic extraperitoneal adenomectomy is occasionally performed for symptomatic large-volume benign prostatic hyperplasia. Two different multichannel ports were used during operations. We describe the technique of single-port extraperitoneal transvesical adenomectomy and present the initial operative experience. Methods: Three patients in whom an open adenomectomy was indicated underwent single-port extraperitoneal transvesical adenomectomy. Following preparation of the extraperitoneal space via an umbilical incision, a multichannel port was inserted. A transverse cystotomy adjacent to the prostatovesical junction, incision of mucosa overlying the adenoma, subcapsular plane development, prostatic adenomectomy and cystotomy repair were performed as the standard steps of the laparoscopic procedure. Results: All cases were completed without conversion to standard laparoscopy. Mean operative time was 105 min. Mean blood loss was 190 ml. Hospital stay was 4 days and catheter duration was 6 days for all patients. No intraoperative or postoperative complication occurred. Conclusions: Single-port extraperitoneal transvesical adenomectomy for large benign prostate hyperplasia is feasible with excellent cosmetic results and minimal morbidity.


International Urology and Nephrology | 2004

Coincidental adrenal ganglioneuroma - a case presenting with enuresis nocturna

Ismet Yavascaoglu; Hakan Vuruskan; Yakup Kordan; Zulkuf Caliskan; Bulent Oktay

A 9-year-old boy presenting with primary enuresis nocturna was discovered to harbour a large left adrenal mass which produced no hormonal abnormalities. He was undergone an exploration and the mass was removed completely. It was found to be an adrenal ganglioneuroma weighing 240 g. Though no cause-and-effect relationship is established, the case no long suffered from enuresis soon after surgery and free of recurrence after 5 years.


Urologic Oncology-seminars and Original Investigations | 2011

What is the adequacy of biopsies for prostate sampling

Hasan Serkan Dogan; Berna Aytac; Yakup Kordan; Feyzullah Gasanov; Ismet Yavascaoglu

OBJECTIVE To investigate the adequacy of the samples obtained by prostate biopsies and the factors those could affect this adequacy. MATERIALS AND METHODS Three hundred seventy-eight patients who underwent transrectal ultrasound guided biopsy have been included into the study. The biopsy samples have been retrospectively reviewed in terms of presence of prostatic glandular elements and prostatic tissue. Factors which may affect the presence of glandular elements have been investigated. RESULTS The mean age, PSA level, and prostate volume were 65 ± 8.1 years, 13.6 ± 17.8 ng/ml, and 52.5 ± 29.8 ml, respectively. Overall cancer detection rate was 25.3%. The highest incidence of absence of prostatic glandular elements was detected at apical (21.8%) and far lateral (21.5%) biopsy samples. The overall rate of absence of glandular elements was 0.16. Absence of glandular elements in at least 1 sample of the biopsy set was detected in 50% of patients. This figure was 27.8% and 16.1% for the absence of glands in at least 3 and 5 samples of the biopsy set, respectively. These results have also been found to be operator-dependent. For patients with PSA between 4 and 10 ng/ml, we found that cancer detection rate was lower in patients with absence of glandular elements. When the possible factors were analyzed, age, PSA, prostate volume, findings of prostate examination, and presence of cancer were not found to be effective on these parameters, whereas the most important factor was the biopsy localization. CONCLUSION Our study showed that prostatic glandular elements, which are keys for histological diagnosis, were absent in a significant number of prostatic biopsy samples and patients. This inadequacy was most prominent in apical and far lateral biopsy specimens and found to be operator-dependent.


Sexual Medicine | 2017

Penile Plication With or Without Degloving of the Penis Results in Similar Outcomes

Rustam Kadirov; Burhan Coşkun; Onur Kaygisiz; Kadir Ömür Günseren; Yakup Kordan; Ismet Yavascaoglu; Hakan Kilicarslan

Background Penile plication techniques with or without degloving offer a minimally invasive option for the treatment of penile curvature. Aim To review the outcomes of penile plication surgery and patient satisfaction with and without degloving of the penis. Methods We conducted a retrospective analysis of 52 patients who underwent penile plication for the treatment of Peyronie disease or congenital penile curvature. Outcomes Surgical success rates, complications, and patient satisfaction determined with the Treatment Benefit Scale were compared between groups. Results The overall surgical success rate was 92.3% at a mean follow-up of 18.84 ± 23.51 months. There were no intraoperative complications. In the degloving group, 42.6% of patients were greatly satisfied and 42.6% had better outcomes; in the without degloving group, 61.5% of patients were greatly satisfied and 30.8% had better outcomes. Comparison of outcomes was not statistically significant between groups. Clinical Implications The results of the present study indicate the two techniques can be used for penile plication. Conclusion With or without degloving, penile plication is safe and effective and provides high patient satisfaction. Kadirov R, Coskun B, Kaygisiz O, et al. Penile Plication With or Without Degloving of the Penis Results in Similar Outcomes. Sex Med 2017;5:e142–e147.


Archivio Italiano di Urologia e Andrologia | 2016

Laparoscopic heminephrectomy for benign and malignant diseases of the horseshoe kidney

Altug Tuncel; Anıl Erkan; Mustafa Sofikerim; Murat Arslan; Yakup Kordan; Yigit Akin; Yilmaz Aslan

OBJECTIVES In the current study, we present our pure laparoscopic heminephrectomy experience in 13 patients with horseshoe kidney (HK). MATERIAL AND METHODS A total of 13 patients with HK underwent pure laparoscopic heminephrectomy (Transperitoneal= 7, Retroperitoneal = 6) due to benign and malign renal conditions (non-functional hydronephrotic and/or infected kidney = 12, kidney mass = 1). RESULTS The mean age of the patients was 45.8 years. The mean operating time was 140 minutes, and estimated blood loss was 131 ml. The mean hospital stay was 2.3 days. Division of istmus was performed with stapler in 5 patients, ultrasonic scalpel in 3, 15 mm Hem-o-lok clip in 3, 10 mm LigaSure vessel seal system in one and endoscopic suture by 0 polyglactin in one patient without bleeding. Twelve patients underwent pure laparoscopic heminephrectomy due to nonfunctional hydronephrotic and or infected kidney. One patient underwent transperitoneal laparoscopic right heminephrectomy due to kidney mass. According to modifies Clavien classification, Grade I complication (wound infection) occurred in one patient (7.7%) who underwent heminephrectomy due to non-functional kidney. CONCLUSIONS Laparoscopic heminephrectomy seems to be technically feasible and safe for benign and malignant diseases in patients with HK.


Cuaj-canadian Urological Association Journal | 2016

Effect of ADMA levels on severity of erectile dysfunction in chronic kidney disease and other risk factors

Kaan Gokcen; Hakan Kilicarslan; Burhan Coşkun; Alparslan Ersoy; Onur Kaygisiz; Yakup Kordan

INTRODUCTION Hormonal, neurogenic, vasculogenic, and psychogenic impairments, as well as endothelial dysfunction may play a role in erectile dysfunction (ED) in patients with chronic kidney disease (CKD). Asymmetrical dimethylarginine (ADMA) is an inhibitor of nitric oxide, which is the key element of ED. ADMA levels are increased in CKD. We aimed to evaluate the effect of serum ADMA, prolactin, testosterone, and hemoglobin levels on erectile function of patients with CKD and control subjects. METHODS A total of 42 men with CKD and 25 age-matched controls were enrolled. The patients with CKD were categorized into group 1 and group 2 based on whether they had ED according to their response to International Index of Erectile Function questionnaire (IIEF-EFD). Group 3 was a control group. Serum ADMA, total testosterone prolactin, and hemoglobin levels of the patients were evaluated. RESULTS Serum ADMA, testosterone, and hemoglobin levels were similar between group 1 and 2, serum prolactin level was significantly high in group 1 than in group 2 or 3 (control group). There was no correlation between ADMA levels and IIEF-EFD scores of patients with CKD. CONCLUSIONS The results of this study suggest serum ADMA level is not related with ED in patients with CKD. Also, low testosterone and hemoglobin levels were not significant factors. High levels of serum prolactin are related with ED in patients with CKD.


European Urology Supplements | 2014

394 Role of Positron Emission Tomography/Computed Tomography (PET/CT) in the evaluation of the metastatic adrenal masses

O. Kaygisiz; G. Ozmerdiven; Yakup Kordan; B. Coskun; H. Vuruskan; I. Yavascaoglu

challenging approach that limits the broader application of the technique. The surgeon is confronted with a number of additional difficulties compared to using conventional laparoscopy, such as the lack of instrument triangulation, instrument shaft clashing, and the need for ambidexterity. Needlescopic-assisted LESS surgery could avoid the major difficulties encountered during the single-site approach. We aimed to compare perioperative parameters between needle-assisted and conventional LESS adrenalectomy (LESS-A). METHODS: 18 consecutive patients undergoing needleassisted LESS-A were compared with 29 patients undergoing conventional LESS-A at Hiroshima University Hospital between November 2009 and September 2013. Needle-assisted LESS-A was performed using MiniLap instruments (Stryker, San Jose, CA, USA). We used this instrument protectively retracted the liver in the right side and the spleen in the left side of the tumour by grasping the endoscopic surgical spacer SECUREA (Hogy Medical Co., Ltd., Tokyo, Japan). RESULTS: LESS-A was completed successfully with no major intraoperative complications in all cases. The two treatment cohorts had similar age, body mass index (BMI), gender, and laterality. Needleassisted LESS-A was significantly performed in the transumbilical approach rather than in the subcostal approach. The insufflation time of the needle-assisted LESS-A was shorter than that of the conventional LESS-A (p 1⁄4 0.0635). No patients required intraoperative or postoperative blood transfusions. CONCLUSIONS: The introduction of the MiniLap instrument spares one access port in the main abdominal multichannel port that can be used to house other necessary instruments. Needle-assisted LESS-A was performed safely, and this avoided many of the difficulties of LESS surgery.


World Journal of Urology | 2011

Percutaneous nephrolithotomy in children: does age matter?

Hasan Serkan Dogan; Hakan Kilicarslan; Yakup Kordan; Sinan Çelen; Bulent Oktay


Journal of Endourology | 2011

Efficacy of Levobupivacaine Infiltration to Nephrosthomy Tract in Combination with Intravenous Paracetamol on Postoperative Analgesia in Percutaneous Nephrolithotomy Patients

Ozgur Elvan Gokten; Hakan Kilicarslan; Hasan Serkan Dogan; Gurkan Turker; Yakup Kordan

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