Conservative surgical treatment of low-grade urothelial carcinoma in the renal allograft recipient: a case report.

Development of urothelial carcinoma in a renal allograft is rare. We report the case of 52-year-old male patient who developed chronic renal failure secondary to Balkan endemic nephropathy and underwent renal allotransplantation. The patient who developed low-grade pTa urothelial carcinoma in the left contracted kidney at 3 years after transplantation and underwent nephroureterectomy. Three years later, the same neoplastic process was observed in the renal allograft. Preoperative estimation for allograft tumor recurrence and progression included percutaneous tumor biopsy followed by cytopathological, histological, and cytogenetic analysis. Cytopathology revealed well-differentiated urothelial tumor cells. Histopathologic analysis showed low-grade urothelial carcinoma. Cytogenetic examination demonstrated that the tumor originated from the recipient suggesting a low malignant potential of carcinoma. Based on these findings, we decided to perform a right-side nephroureterectomy and graft-sparing procedure, which resulted in preservation of allograft function. In this report we discussed the prognostic factors, which are the basis for rational therapeutic approaches in these patients.