TY - JOUR ID - TI - •Immunohistochemical Cytokeratine 20 over expression in urinary bladder carcinoma AU - Shoroq Mohammad Abbas Al-Temimi AU - Maather Baqer Hussein Al-Harmoosh PY - 2011 VL - 4 no 2 IS - 10 SP - 1077 EP - 1083 JO - Karbala Journal of Medicine مجلة كربلاء الطبية SN - 19905483 29580889 AB - this study was conducted to estimate the over expression of CK 20 protein in human bladder carcinoma (transitional cell carcinoma in comparison to squamous cell carcinoma) and to show its possible correlation to the pathological parameters (gradeand stage) of TCC cases . We evaluated the available tissue blocks of 50 patients with bladder carcinoma lesions (40 with TCC & 10 cases with SCC) who had referred to Al-diwaniya Hospital between January 2007 and December 2010.The mean age of the patients was 55 years (range, 33 to 77 years). The TCC were classified according to grades into grade I, II and III in 20 (50%), 10 (25%), and 10 (25%) cases, respectively and according to stages into Ta in 10 (25%), T1 in 10(25%), T2 in 10(25%) and T3 in 10(25%). From 40 cases of TCC, A total of 28 (70%) patients were positive for over expression of CK20 and no expression were found in cases SCC. High histological grades of the TCC were associated with decrease expression of CK 2 .There were 20 (100%) in GI , 5 (50%) in GII , 3 (30%) in GII (P = .0000) while CK20 expression decreased as the tumor stages increased , it was 10 (100%) in Ta , 8 (80%) in T1 , 6 (60%) in T2 , 4 (40%) in T3 , and there is a statistically significant correlation with the stages of TCC of bladder (p=0.0229 ) .Aim of the Study: This study was conducted to estimate the over expression of CK-20 protein in human bladder TCC in comparison to bladder SCC lesions and to show its possible correlation to the pathological parameters of TCC like (grade and stage) .Key ward: - Bladder TCC, Bladder SCC, Cytokeratin 20, IHC

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