Spontaneous common iliac vein rupture: a case report.

A 68-year-old woman, admitted because of acute lower quadrant abdominal pain but no history of trauma, underwent laparotomy for a suspected ruptured aortic aneurysm. Exploration revealed a 20-mm longitudinal tear in the left iliac vein. The vein was repaired primarily. Her postoperative course was complicated by deep vein thrombosis. Spontaneous rupture of the iliac vein without trauma is rare, but occurs predominantly in healthy white women between the ages of 40 and 80 years. Various causative mechanisms have been described: inflammation of the vessel wall secondary to thrombophlebitis, proximal obstruction of the iliac vein and spontaneous rupture without obstruction or thrombosis. In many cases an increase in intra-abdominal pressure is noted.