[A Case of Unilateral Synchronous Occurrence of Renal Pelvic Urothelial Carcinoma and Renal Cell Carcinoma].

A 73-year-old man presented with asymptomatic macroscopic hematuria. Contrast-enhanced computed tomography revealed a mass filling the right renal pelvis, along with a 2cm cystic tumor in the dorsal aspect of the right upper pole. A retroperitoneoscopic nephroureterectomy was performed based on the diagnosis of right renal pelvic carcinoma. Pathological diagnosis confirmed that the right renal pelvic mass was an invasive urothelial carcinoma, classified as G2 with INFa, pT1, ly0, and v0, while the cystic tumor was a chromophobe renal cell carcinoma, classified as G2 with INFb, pT1a, and v0. No postoperative chemotherapy was administered. The patient's recovery was uneventful, and, seven years after the operation, he remains alive with no signs of recurrence or metastasis.