[Pathogenesis of congenital aneurysm of the internal jugular veins].

Congenital aneurysm of the internal jugular veins is a developmental anomaly of the venous wall occurring as a consequence of hypoplasia of the smooth-muscle element of the media and deficiency of the elastic framework. The disease is marked by a progressive course linked with enlargement of the aneurysm and thinning of its walls. Hemoliquorodynamic disorders uncorrectable by drugs develop in childhood and are registered during rheoencephalography. In view of this the existence of an aneurysm is an indication for operative treatment for restoration of adequate drainage of venous blood from the head.