Most common histological variant of RCC is:: (A) Clear cell carcinoma, (B) Papillary carcinoma, (C) Chromophobe carcinoma, (D) Collecting duct carcinoma
Answer is A. Renal cell carcinoma Clear cell carcinoma (70%) Sporadic (mc), Familial Papillary carcinoma (15%) Papillary growth pattern Familial and sporadic forms Chromophobe carcinoma (5%) Prominent cell membranes and pale eosinophilic cytoplasm, Halo around the nucleus. Collecting duct (Bellini duct) carcinoma (<1%) From collecting duct cells in the medulla