<prompt> Most common histological variant of RCC is:Clear cell carcinomaPapillary carcinomaChromophobe carcinomaCollecting duct carcinoma  <response>: 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 