Urinoma--a rare presentation of carcinoma of the bladder.

Urinoma as a presenting sign of carcinoma of the bladder, as occurred in this case, is rare. Aspiration of the cystic mass under sonography and chemistry of the fluid confirmed the diagnosis. The inferior extension of the urinoma on CT scan confirmed the gradual fading of Gerota's fascia into the retroperitoneum. Abdominal mass in the form of a urinoma is an uncommon presentation and only a few documented cases are reported in the literature. This case illustrates that the Gerota's fascia fades inferiorly into the retroperitoneum.