The value of retroperitoneal lymphadenectomy in the management of nonseminomatous testicular tumors is still a matter of controversy. Lymphadenectomy doubtlessly has great advantages but is somewhat down-graded by the considerable associated morbidity. Our experimental study in six pigs has shown that retroperitoneal lymphadenectomy by mens of laparoscopic techniques is feasible. Clinical trials will follow. Should they prove successful, the role of retroperitoneal lymphadenectomy in the management of testicular tumors has to be reassessed.