Choriocarcinoma presenting as a unilateral renal mass and gross hematuria in a male: report of a case.

Choriocarcinoma of the kidney, either primary or metastatic, is rarely reported in the literature. We encountered a male patient with choriocarcinoma of the right kidney. The patient initially presented with fever, gross hematuria and flank pain. He had initially been unsuccessfully treated for bilateral renal stones for four months before an accurate diagnosis was made. The disease was verified only after a resection of the right kidney and meticulous examination of microscopic sections of the tumor. Further immunohistochemical study strongly supported the diagnosis of choriocarcinoma. The tumor responded briefly to Cisplatinum, Vinblastine and Bleomycin (PVB) treatment. The patient died of brain metastasis and respiratory failure four months after starting systemic chemotherapy.