<prompt> Polycythemia is seen with which tumor -Renal cell carcinomaEndometrial carcinomaLung carcinomaFibrosarcoma  <response>: A number of paraneoplastic syndromes due to ectopic hormone production by the renal cell carcinoma have been described. These include polycythemiaby erythropoietin, hypercalcemiaby parathyroid hormone and prostaglandins , hypeensionby renin, effects of feminization or masculinization by gonadotropins and cushings syndrome by glucocoicoids, hepatic dysfunction, eosinophilia, leukemoid reactions, and amyloidosis. FromTextbook of pathology Harsh Mohan,6th edition, pg no:696; Pathologic basis of disease Robbins,8th edition, pg no:966 