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[Surgical enucleation of renal tumors].

Surgical enucleation for renal malignant tumors has a fundamental problem of leaving residual malignancy. We reviewed the results of enucleation in six patients treated from January 1980 to December 1987. Of them four had renal cell carcinoma alone unilaterally or bilaterally, one had renal cell carcinoma associated with angiomyolipoma in the same side, and one had renal oncocytoma. Of the 5 patients with renal cell carcinoma, 4 remained free of cancer in the follow-up period, while one with pathological stage II tumor in the nephrectomized contralateral kidney died of recurrent disease. Three patients presently are free of disease 2 to 31 months postoperatively. Although some authors point out the malignant potential of renal oncocytoma, the patient with oncocytoma has not evidence of recurrence 8 months after enucleation. We consider that surgical enucleation for renal cell carcinoma as well as oncocytoma and angiomyolipoma may have a curative efficacy in selected patients, especially for so called "small incidental cancer".