The results of a prospective study of 30 patients with scortal varicocele on the left side during the past 12 months are presented. By means of preoperative venography of the renal, internal spermatic and commmon iliacveins, the etiologic identification is possible. Variococele could be distinguished in which the cause arises inthe internal spermatic vein an/or proximal nutcracker phenomenon(by compression of ISV between the aorta and superior mesenteric artery) and/or distal nutcracker phenomenon(by obstruction of common iliac vein). Use ofpreoperative venography is essential to estabilish the etiology and anatomy of the lesion and its proper selectionof treament methods including subsequent coil embolization.