<prompt> Polycythemia is associated withStomach cancerLiver cancerProstate cancerRenal cell cancer  <response>: Polycythemia and increased erythropoietin in a patient with chronic kidney disease. ... DIAGNOSIS: Chronic renal insufficiencycaused by obstructive hydronephrosis andaccompanied by increased erythropoietin levels of renal origin and polycythemia. 