<prompt> True statements about renal cell carcinoma except?Asbestos, sickle cell anemia petroleum products are risk factorsClear cell cancer arise from proximal convoluted tubuleCannon ball metastasisBellini duct cancer arise from loop of henle.  <response>: Bellini duct cancer arise from the collecting duct cells in medulla not the Loop of Henle. Risk factors of Renal Cell Carcinoma : Cigarette smokers have double the incidence of renal cell carcinoma Tobacco HTN obesityestrogen Asbestos Sickle cell anemia Petroleum products Clear cell carcinoma arises from Proximal convoluted Tubule. Cannon ball opacities on chest x-ray suggest metastatic malignancies such as choriocarcinoma, lung carcinoma, renal cell cancer, or endometrial carcinoma. 