Abstract
Results of a retrospective study of 67 patients with scrotal varicocele on the left side are presented. By means of preoperative venography of the renal, internal spermatic and common iliac veins, 3 types of varicocele could be distinguished; the cause arises in the internal spermatic vein, and/or the varicocele is caused by common iliac vein obstruction. Use of routine preoperative venography is essential to establish the varicocele etiology and its proper management.