During a 20-year period 17 patients underwent partial nephrectomy as primary curative therapy for renal adenocarcinoma. In 15 patients (88 per cent) partial nephrectomy was performed satisfactorily in situ with free margins of resection. Eleven patients are alive (65 per cent) and only 3 (17 per cent) died of recurrent malignant disease. There was no operative mortality and postoperative complications were minimal. A review of the literature reveals that partial nephrectomy is an effective form of therapy for patients with bilateral renal carcinoma or carcinoma occurring in a solitary kidney.