[Organ preserving surgical treatment of solitary and bilateral renal tumors].

The surgical treatment of patients with tumours in solitary kidneys and bilateral renal tumours is controversial. Conservative surgical procedures by excision of the tumour in situ or by extracorporeal "work bench surgery" with subsequent autotransplantation are a real alternative to radical nephrectomy which necessitates chronic dialysis or renal allotransplantation. 23 patients with tumours in solitary kidneys resp. bilateral renal tumours have been treated by local excision in situ (10 patients) or extracorporeal surgery (15 patients). The preoperative diagnostic investigations, indications for in situ resp. extracorporeal surgery, details of the operative procedure and results of treatment are presented and discussed.