Bilateral asynchronous renal cell carcinoma: treatment approach.

Two hundred patients underwent nephrectomy for renal cell carcinoma (RCC) at our service in 1978-89. During follow-up four patients developed RCC in the remaining kidney and underwent a parenchymal preserving procedure as curative treatment (one enucleation, and three partial nephrectomies). The interval between the nephrectomy and the diagnosis of asynchronous RCC was 50-84 months (mean 65 months). None of the patients needed dialysis after the operation, and creatinine level in all remained between 1.6 and 1.9 mg. One patient died from a heart attack 8 years after the partial nephrectomy, two patients have no evidence of disease 24 months and 76 months after enucleation and partial nephrectomy, respectively. The fourth patient, who had resection of metastatic lesion in the scalp 36 months before the partial nephrectomy, is alive 34 months after the procedure but has lately developed recurrence in the scalp. Although relatively rare, it is important to be aware of the possible asynchronous development of RCC in the contralateral kidney after nephrectomy for RCC. In such cases, parenchymal preserving procedure (enucleation, partial nephrectomy) is an alternative that should be considered to improve the quality of life and to avoid the need for dialysis.