[A single case report of postrenal acute renal failure caused by pelvic and ureteral tumor composed of a mixture of transitional cell carcinoma and adenocarcinoma].

A 68-year-old woman was admitted to our hospital because of severe oliguria and macrohematuria. She was diagnosed as postrenal acute renal failure, because of bilateral dilatation of the renal pelvis on abdominal computed tomography (CT). Percutaneous nephrostomy was performed after hemodialysis was initiated. Next, urinary volume and serum creatinine level were normalized. Percutaneous biopsy towards the mass in the peritoneal cavity under abdominal CT revealed adenocarcinoma, although the primary site of the carcinoma could not be identified. Autopsy was permitted after her sudden death. It revealed that the primary carcinoma was a right pelvic and ureteral tumor. The right pelvic and ureteral tumor was composed of a mixture of transitional cell carcinoma and adenocarcinoma.