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Author: search.filters.author.Aybek, Zafer

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    Urogenital and Rectal Multisystem Organ Injury After Detonation of an Explosive Substance in the Rectum of a Schizophrenic Man
    (ELSEVIER SCIENCE INC, 2014-01-01) Zumrutbas, Ali E.; Baser, Aykut; Acar, Cenk I.; Ozlulerden, Yusuf; Okutan, Aysegul; Sahin, Umit Y.; Aybek, Zafer
    Penetrating injuries are caused by the injury of perineal area with gun or stab wounds, which may cause complex injuries or multiple organ injuries. Infections, bleeding, necrotizing fasciitis, ureterocutaneous fistulas, diverticulum, abscesses, narrowing, and incontinence may arise after urethral injuries. Although there are several case reports of urogenital system traumas in the literature, this case reports a schizophrenic patient who had a multisystem genitourinary and rectal trauma after self-detonation of an explosive in the rectum and managed with reconstructive surgery without any postoperative complications. Lower urinary tract anatomy was preserved and full continence was achieved after the surgical procedure. (C) 2014 The Authors. Published by Elsevier Inc. All rights reserved.
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    The determination of stage in nonmuscle urothelial carcinoma: Staining pattern of caspase-8
    (MEDKNOW PUBLICATIONS \& MEDIA PVT LTD, 2018-01-01) Sen Turk, Nilay; Eskicorapci, Saadettin; Aybek, Zafer; Tuncay, Levent
    Context: Urothelial carcinoma (UC) is one of the most frequent epithelial tumors worldwide. Aims: We aimed to investigate the protein expressions of caspase-8, p53, murine double minute 2 (mdm2), and p14(ARF) in nonmuscle UCs and to correlate the findings with clinicopathological characteristics. Settings and Design: A total of 50 patients who had pTa and pT1 tumors were analyzed. Subjects and Methods: The protein expressions of caspase-8, p53, mdm2, and p14ARF were analyzed by immunohistochemistry. Statistical Analysis Used: Chi-square test was done using SPSS version 16.0 (SPSS, Inc., Chicago, IL, USA). Results: Cytoplasmic caspase-8 expression was significantly higher in pT1 UCs while nuclear caspase-8 expression was significantly higher in pTa UCs (P = 0.005 and P = 0.011, respectively). Cytoplasmic caspase-8 expression was also higher in high-grade UCs (P = 0.035). The expression of p53, mdm2, and p14ARF was not also related with pathological stage or grade (P > 0.05 for all). The p14ARF expression was related with nuclear caspase-8 expression in most of the patients. Complete agreement among nonmuscle UCs for immunohistochemical expression of p14 and nuclear caspase-8 was seen in 41 cases, and the pairwise kappa agreement value was substantial (kappa = 0.614). The patients who had recurrence were positive for both p53 and mdm2 or either p53 or mdm2 (P = 0.025). Conclusions: These results suggested that the staining pattern of caspase-8 might be helpful for determining of the stages in nonmuscle UC. It was also showed that the expression status of p53 and mdm2 were related with the recurrence.