Superior mesenteric artery (SMA) syndrome is a rare condition in which the third part of the duodenum is trapped between the abdominal aorta and the SMA. Any disease process decreasing the angle between the aorta and the SMA can result in external compression of the duodenum and subsequent intestinal obstruction. Aneurysms of the pancreaticoduodenal artery (PDA) and its branches are also rare and account for only 2
作者：Yong Pil, Cho；Jae-hong, Ahn；Hyuk Jai, Jang；Yong Ho, Kim；Sung Gyu, Lee
来源：Surgery today 2004 年 34卷 3期
