Tıp Fakültesi / Faculty of Medicine

Permanent URI for this collectionhttps://hdl.handle.net/11727/1403

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Author: search.filters.author.Kosan, Muratsearch.filters.applied.f.language: search.filters.language.eng

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    Re: Cicek et al.: Spinal Anesthesia Is an Efficient and Safe Anesthetic Method for Percutaneous Nephrolithotomy (Urology 2013;83:50-55) Reply
    (2014) Gonulalan, Umut; Cicek, Tufan; Kosan, Murat; https://orcid.org/0000-0002-0784-9926; 24581537
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    Urethral Duplication: A Rare Cause of Recurrent Urinary Infection
    (2015) Cicek, Tufan; Kizilkan, Yalcin; Coban, Gokcen; Kosan, Murat; 0000-0002-4729-0100; 0000-0002-0784-9926; 25831685; P-7533-2014; ADD-5305-2022
    Urethral duplication is quite a rare congenital anomaly with ill-defined aetiology. Patients often present with penile deformity, recurrent urinary infections, urinary incontinence, serosal discharge from the accessory urethra, and difficulty in urinating. Urethral duplication is most commonly grouped according to the Efmann classification. It has 3 main types as Type I, II, and III. There is no consensus on its therapy. There are non-surgical solutions, including follow-up without therapy, as well as many surgical options, including urethral reconstruction. Anatomical urethra and the external sphincter should absolutely be delineated when a surgery is contemplated. We herein report the case of a two-year-old male patient referred to our clinic with recurrent urinary infection, bilateral hydronephrosis and difficulty in urinating who was diagnosed with urethral duplication. We discuss our findings with review of the relevant literature.
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    Skin-to-Stone Distance Has No Impact on Outcomes of Percutaneous Nephrolithotomy
    (2014) Gonulalan, Umut; Akand, Murat; Coban, Gokcen; Cicek, Tufan; Kosan, Murat; Goktas, Serdar; Ozkardes, Hakan; https://orcid.org/0000-0002-4010-2883; https://orcid.org/0000-0002-0784-9926; https://orcid.org/0000-0002-7277-449X; 24481206; P-7533-2014; AAH-1052-2020
    Objective: Skin-to-stone distance (SSD) is a stronger factor than body mass index in predicting the success of shock wave lithotripsy. We aimed to evaluate the impact of SSD on outcomes of percutaneous nephrolithotomy (PCNL). Materials and Methods: The medical records of 1,280 patients who had undergone PCNL between April 2007 and February 2012 were evaluated retrospectively. 192 patients who had had preoperative non-contrasted computed tomography and single renal access were included the study. According to this median SSD value, patients were divided into two groups: group 1 (SSD <= 94 mm) (n = 92) and group 2 (SSD >94 mm) (n = 90). The groups were compared according to operative and postoperative parameters. Results: We found no significant differences between the two groups with regard to stone-free rate, operation time, fluoroscopy time, hospitalization time, visual analog score of pain, stone burden, transfusion rates and complication rates. On the other hand, the mean body mass index of group 1 was significantly lower than that of group 2 (p < 0.05). Conclusions: In this retrospective review of patients undergoing PCNL, we found that SSD has no impact on operative and postoperative outcomes. These results were in accordance with the safety of PCNL in obese patients. (c) 2014 S. Karger AG, Basel
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    Predictive values of vascular endothelial growth factor and microvessel-density levels in initial biopsy for prostate cancer
    (2016) Kervancioglu, Enis; Kosan, Murat; Erinanc, Hilal; Gonulalan, Umut; Oguzulgen, Ahmet Ibrahim; Coskun, Esra Zeynep; Ozkardes, Hakan; 26944325
    Angiogenesis is an important factor in the development and progression of prostate cancer (PCA). We aimed to investigate the values of vascular-endothelial-growth-factor (VEGF) expression level and microvessel density (MVD) in the prediction of PCA diagnosis at repeated prostate biopsy (re-PBx). We retrospectively evaluated 167 patients with re-PBx according to elevated prostate-specific antigen levels, suspicious digital rectal examination, and the presence of premalignant lesions. Patients with PCA on re-PBx were included in the cancer group (n = 17). Patients with benign prostatic hyperplasia or normal tissues on re-PBx were included in the control group (n = 21). The groups were compared according to the expression level of VEGF and MVD in initial prostate biopsy. There was no statistically significant difference between groups according to age and serum prostate-specific-antigen values. The mean VEGF scores of the cancer and control groups were 232.64 +/- 11.14 and 183.09 +/- 14.56, respectively (p < 0.05). The mean MVD of the biopsy samples in the cancer and control groups were 246.47 +/- 17.59 n/mm(2) and 197.33 +/- 16.26 n/mm(2), respectively (p < 0.05). The cutoff values of VEGF scores and MVD were set as 200 and 215, respectively, for PCA detection in our study. Our results showed that the expression level of VEGF and MVD significantly increased in the initial prostate-biopsy samples of patients with PCA diagnosed with re-PBx. The evaluation of VEGF expression level and MVD might have an important value in the prediction of PCA at re-PBx. The expression level of VEGF and MVD should be kept in mind as PCA-related histopathological changes that indicate the increased angiogenesis in prostatic tissue. Copyright (C) 2015, Kaohsiung Medical University. Published by Elsevier Taiwan LLC.