[Conservative surgery for renal cell carcinoma].
During the nine years period from April 1984 through March 1993, we performed conservative surgery on 26 kidneys in 25 patients with renal cell carcinoma. Of these 25 patients the indication was imperative in 8 patients (the imperative group) and elective in 17 patients (the elective group). Eight patients of imperative group consisted of 5 patients with bilateral renal cell carcinoma (3 synchronous and 2 asynchronous), 1 patient who had renal cell carcinoma on one side and renal pelvic carcinoma on the other side, and 2 patients with renal cell carcinoma in a solitary kidney. In these 8 patients of the imperative group, conservative surgery was performed on 9 kidneys since 1 of 3 patients with synchronous bilateral renal cell carcinoma underwent the conservative surgery for both kidneys. In the elective group, all 17 patients had a small renal cell carcinoma, with the contralateral kidney normal in all. Enucleation was conducted on 4 kidneys out of 9 kidneys in 8 patients of the imperative group. On a total of 22 kidneys consisting of the remaining 5 kidneys and 17 kidneys of the elective group partial nephrectomy was done. The tumor size ranged from 0.9 to 7.0 cm (mean: 3.5 cm) for the imperative group and from 0.8 to 3.0 cm (mean: 2.3 cm) for the elective group. Thus, the tumor size was less than 3.0 cm in all of these 17 cases. As to the histologic atypia, 12 patients were classified as grade 1 and 14 patients as grade 2. None of the patients were classified as grade 3.(ABSTRACT TRUNCATED AT 250 WORDS)