De novo renal cell carcinoma of native kidneys in renal transplant recipients: a single-center experience

Marek Karczewski, Piotr Rzymski, Jacek Karczewski
Experimental and Clinical Transplantation 2012, 10 (4): 310-3

OBJECTIVES: Our study aimed to determine the incidence of de novo renal cell carcinoma in the native kidneys of patients transplanted at our center and to identify possible risk factors.

MATERIALS AND METHODS: We performed a retrospective, single-center cohort study, which included patients transplanted at the District Hospital in Poznan, Poland, during 1994-2011, among whom 836 were selected. Sixty-three patients with confirmed de novo cancer were found. Of those, 11 had renal cell carcinoma in the native kidney (1.3%) and 2 in the transplanted kidney (0.2%).

RESULTS: Mean follow-up was 10 ± 3.2 years. Mean age at renal cell carcinoma diagnosis was 52 ± 9.4 years, and mean time from transplant was 3 ± 2.6 years. A statistical analysis showed no significant differences in demographic or clinical characteristics between renal cell carcinoma and noncancer group, except for the prevalence of male sex and smoking in the cancer group (P < .05).

CONCLUSIONS: Renal cell carcinoma development in the native kidney seems to be an early event, frequently observed within 4 to 5 years after transplant. We believe that kidneys in renal transplant recipients should be routinely screened by ultrasound for early diagnosis.

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