Sarcomatoid Urothelial Carcinoma of the Renal Pelvis with Extremely Aggressive Clinical Behavior

ABSTRACT

Sarcomatoid urothelial carcinoma is a rare malignancy with a poor prognosis. We experienced a case of sarcomatoid urothelial carcinoma of the renal pelvis with extremely aggressive clinical behavior. An 81-year-old woman underwent a laparoscopic radical nephroureterectomy to remove a 4.5x3.1 cm sized localized left renal pelvis mass. The mass was pathologically confirmed as a sarcomatoid urothelial carcinoma. Although the operation was successful, the patient died 2 months postoperatively with widely metastatic disease.