[The structure and function of the vena spermatica interna--the etiology of varicocele].

From 60 male corpse in the age of 13 to 77 both venae spermaticae internae were completely removed. On the basis of these specimens we investigated the incidence, localization, form and scale of the venous valves in the vena spermatica interna. All venous valves were remodeled and examined for their sufficiency on the basis of these date. In the left vena spermatica interna we found in 83% and in the right vena spermatica in 97% of the cases one or more valves. On the average the left vena spermatica contains 3.5 and the right 3.8 valves. From each vein a drawing was made, showing the remification, the localization of the valves and the valvular function. On the basis of this drawing and reconstructions of valves in the left vena spermatica interna for 90% of the cases and in the right vena spermatica for 75% of the cases a retrograde flow of the blood is possible. The absence of a varicocele can be explained by the presence of a sufficient venous valve on the left side in only 10% and on the right side in 25% of our cases. For the development of a varicocele therefore further facts are of importance.