Person: KAYA, CEVDET
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KAYA
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CEVDET
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Publication Metadata only Evaluation of urinary neutrophil gelatinase-associated lipocalin as a biomarker in pediatric and adult patients with ureteropelvic junction obstruction(2017-03-01) KAYA, CEVDET; ŞAHİN, BAHADIR; TANIDIR, YILÖREN; ŞEKERCİ, ÇAĞRI AKIN; ŞİMŞEK, FERRUH; Talibzade F., KAYA C., ŞAHİN B., TANIDIR Y., ŞEKERCİ Ç. A., AKBAL C., ŞİMŞEK F.Publication Open Access Are There Any Differences in the Neural and Extracellular Matrix Proteins Density Between Children and Adults with Intrinsic Ureteropelvic Junction Obstruction?(GALENOS YAYINCILIK, 2017-12-27) KAYA, CEVDET; Sahin, Bahadir; Kaya, Cevdet; Talibzade, Farhad; Tanidir, Yiloren; Ercan, Feriha; Demirci, Elif Kervancioglu; Sekerci, Cagri Akin; Akbal, Cem; Simsek, FerruhObjective: To compare changes in connective, neural and muscle tissues, and extracellular matrix in child and adult patients so that we can create a more objective view on the timing of surgery. Materials and Methods: Twenty-six patients, who were operated for ureteropelvic junction (UPJ) obstruction in our clinic between September 2014 and May 2016, were included in the study. For the evaluation of connective tissue, Masson's trichrome staining was used. Muscle, extracellular matrix elements and neural tissue were evaluated with immunohistochemistry using alpha-smooth muscle actin (a-SMA), Tenascin C and S100, respectively. Microscopically, the tissues were scored according to their staining density (0: No staining; 1: Minor; 2: Moderate, 3: Dense). Results: There were 12 children and 14 adults in the study groups. The initial evaluation showed no statistically significant difference between studied tissue types with respect to staining density for all parameters (Masson: p=0.414, a-SMA: p=0.204, Tenascin-C: p=0.264, S100: p=0.534). There was no statistically significant correlation between staining density and renal function percentage of the affected kidney (Masson: r=0.454, p=0.051, alpha-SMA: r=-0.323, p=0.177 -Tenascin-C: r=0.290, p=0.229 -S100: r=-0.080, p=0.744). Conclusion: Our preliminary study showed some structural changes between adult and child patients but there is no statistically significant difference between the groups with respect to staining density scores. These results state that although UPJ obstruction is an ongoing process, there is no correlation between the histological deterioration degree of the UPJ segment and the loss on renal function for both children and adults.Publication Open Access Approach to bulbar urethral strictures: Which technique and when?(2016-05-04) KAYA, CEVDET; Joshi, Pankaj; Kaya, Cevdet; Kulkarni, SanjayPublication Open Access Exploration of fluoroquinolone-induced retinal pigment epithelium layer changes in the pathogenesis of macular degeneration(2022-09-01) ÇEKİÇ, OSMAN; KAYA, CEVDET; Ozcelik-Kose A., ÇEKİÇ O., Kaya C.Purpose: Fluoroquinolone toxicity studies in animals (cats, rabbits and mice) showed that acute retinal de-generations appear clinically related to phototoxicity. The aim of this study was to evaluate the association between the administration of oral fluoroquinolone and the onset of clinically or subclinically detectable acute retinal degeneration in humans. Material and Methods: This study included patients that received oral fluoroquinolone treatment (ciprofloxacin, levofloxacin or moxifloxacin) for variable systemic diseases diagnosed by the Department of Urology and Infectious Diseases (study group, n=76), and age and sex matched otherwise healthy subjects (control group, n=50). All the subjects underwent a detailed ophthalmologic examination including tests for visual acuity, intraocular pressures, color vision, photostress recovery time and contrast sensitivity measurements, central foveal thickness, subfoveal choroidal thickness, ganglion cell complex thickness and 10/2 Humphrey visual field test. Color fundus and fundus autofluorescence photographs were also obtained. Examinations and tests were repeated at 1st week and 1st month in the study group. Results: There was no statistically significant difference among visual acuity, intraocular pressure, photostress recovery time, color vision, contrast sensitivity measurements, central foveal thickness, subfoveal choroidal thickness, average ganglion cell complex thickness, superior ganglion cell complex thickness, inferior ganglion cell complex thickness, focal loss volume, global loss volume, mean deviation, pattern standard deviation values in treatment group at baseline, 1st week and 1st month (p > 0.05, for the comparison of each parameters). There was not any alteration among color fundus and fundus autofluorescence photographs obtained at baseline, 1st week and 1st month in treatment group. All parameters within the study and control groups were similar throughout the study period (p > 0.05, for the comparison of each parameter). Conclusion: This study evaluated the association between the administration of oral fluoroquinolone and the onset of acute retinal degeneration. Preliminary results of this study showed that use of oral fluoroquinolone had no detectable impact on retinal degeneration at acute phase.Publication Metadata only Üreteropelvi̇k bi̇leşke darlığı olan çocuk ve eri̇şki̇n hastalarda nötrofi̇l jelati̇naz ili̇şki̇li̇ li̇pokali̇n’ İn bi̇yoki̇myasal beli̇rteç olarak değerlendi̇ri̇lmesi̇(2016-11-06) KAYA, CEVDET; ŞAHİN, BAHADIR; TANIDIR, YILÖREN; ŞİMŞEK, FERRUH; Talibzade F., KAYA C., ŞAHİN B., TANIDIR Y., Sekerci C. A., AKBAL C., ŞİMŞEK F.Publication Metadata only Large cystitis glandularis: a very rare cause of severe obstructive urinary symptoms in an adult(SPRINGER, 2007) KAYA, CEVDET; Kaya, Cevdet; Akpinar, Ihsan N.; Aker, Fugen; Turkeri, Levent N.Cystitis glandularis is a very rare proliferative disorder of the mucus-producing glands within the mucosa and submucosa of urinary bladder epithelium. We report such a case of glandular cystitis with intestinal metaplasia masquerading as a bladder tumor in a young male patient who presented with severe obstructive urinary symptoms. Cystoscopy revealed a tumor well circumscribed, measuring 5 x 4 cm on the trigone. Transurethral resection of the mass was carried out and the histopathology suggested cystitis glandularis. The literature regarding this entity has been reviewed and the differential diagnosis was discussed. Short-term follow-up of the patient with sonography and cystoscopy showed no recurrence.Publication Open Access A novel method in decision making for the diagnosis of anterior urethral stricture: using methylene blue dye(AVES, 2017-11-10) KAYA, CEVDET; Joshi, Pankaj; Kaya, Cevdet; Surana, Sandesh; Desai, Devang J.; Orabi, Hazem; Iyer, Subramanian; Kulkarni, Sanjay B.Objective: The use of methylene blue dye (MB) to highlight anatomical structures in urology has been well-established. Urethral stricture may extend about a centimeter beyond the abnormal area seen on urethrogram. Although the current literature suggests a tension-free and end-to-end anastomosis after excision of the strictured urethral segment with spongiofibrosis and surrounding corpus spongiosum in short bulbar strictures, some centers dealing with urethroplasty prefer anastomosis for short bulbar strictures while others prefer augmentation. With this study, use of MB for delineating stricture line and assessing spongiofibrosis in the diagnosis of urethral stricture was evaluated. Material and methods: Five cc MB including 10 mg/mL is diluted with 10 cc saline. In the first scenario, MB is gently injected into urethra via the meatus before the urethroplasty procedure. Meanwhile, the extent of urethral segment stained by MB is noted. In the second scenario (MB spongiosography) in short bulbar stricture, insulin needles are inserted in spongiosa of the stricture site distally and proximally. MB is gently injected with distal needle. The two remaining needles are then observed. Presence of MB efflux in proximal needle implies deficiency of significant spongiofibrosis, so buccal augmentation is performed. Absence of efflux of MB implies significant spongiofibrosis and anastomotik site excised. Results: Four hundred and ninety-two consecutive cases prospectively evaluated between 2010 and 2014. Precise staining of stricture was successfully observed in 464 (94%) patients. Grossly normal appearing urothelium remained pink. Histopathology confirmed that the stained urethra had a stricture. Of the 22 short bulbar idiopathic strictures, in 18 (82%) MB was seen across the stricture and urethral transection was avoided. Anastomosis was performed in 4 (18%) cases where no MB went across the primary excision. There were no known allergic complications. Conclusion: MB aids in delineating the urethral lumen and exact site of stricture that needs augmentation. MB Spongiography in short bulbar strictures could be used as a beneficial guide in relation to the type of urethral repair to be performed in terms of augmentation versus excision and anastomosis.