Outcome with surgical repair of extrahepatic portal vein aneurysms.

Extrahepatic portal vein aneurysm is a rare clinical entity. The two most common locations for aneurysmal formation are at the confluence of the superior mesenteric vein (SMV) and the splenic vein, and at main portal vein trunk, just above the SMV-splenic vein confluence. In this article, two cases of extrahepatic portal vein aneurysm and their surgical treatment are presented. One is a saccular aneurysm located at the truncus of the portal vein; the other is a fusiform aneurysm at the confluence of the superior mesenteric vein and the splenic vein.