Objective: Urothélial carcinoma (UC) accounts for nearly 90 % of urinary bladder tumors.A variety of histological variant of UC have been recently recognosed. Some variants have prognostic and therapeutic implications. The aim to this study is to assess the pathological features from our series and to compare our results that of the literature. Method: We retrospectively studied 92 patients who were diagnosed histopthologically with urothelial carcinoma using the WHO classification system. Results: The mean age of patients at diagnosis was 60(range, 30-70 years). 86,67 % were male (80 H/12 F). All tumors were classified as urothelial carcinomas: 2,1 % urothelial neoplasm with squamous differentiation,2,1 % with glandular differentiation,2,1 % urothelial tumors nested and 1 % sarcomatoid. In this study most tumors were grade 2 (67 cases) and stage pT1. Conclusion: Adult urothelium has the capacity to undergo several pathways of phenotypic cellular and structural differentiation as a result of the embryological origin of the bladder from the multipotent tissues of the cloacal endoderm and the mesodermal wolffian ducts. The clinical course of bladder cancer varies depending on the histological type of neoplasm, grade and stage of the tumor. Hight-grade muscle-invasive urothelial cancers and tumors schowing variant microscopic morphology have in general hight mortality and poor prognosis.