Mucinous adenocarcinoma arising in the renal pelvis of an ectopic pyelic kidney.

A case of mucinous adenocarcinoma probably originating in the renal pelvis of an ectopic pyelic kidney with infiltration of the adjacent urinary bladder is reported. Review of the literature shows that this is the 42nd case of such a tumor, the second one reported in the pelvis of an ectopic pyelic kidney, and the first infiltrating the urinary bladder.