[Organ-sparing operative therapy of kidney tumors].

In 24 (4.8%) of 503 patients with renal tumors, the growth was located in solitary or residual kidneys, and the overall renal function was diminished. This was the indication used for tumor enucleation or partial nephrectomy. Of the patients with renal cell carcinoma, 75% were free of tumor after a mean follow-up of 27 months (8-65). There were 18 patients with stage 1 (T1, T2, N0, M0) and 2 with stage 2 tumors. Three patients had a angiomyolipoma and one underwent nephrectomy because of a late postoperative complication. This outcome compares favorably with the results of radical nephrectomy in cases with normal kidney function. In conclusion, enucleation or partial nephrectomy is justified in patients with impaired renal function and may be considered in patients with T1, G1 tumors in normal functioning kidneys.