<prompt> All are true regarding superior Mesenteric Artery Syndrome, except -Caused by compression of distended duodenumCommon in young femalesDoes not occur in obese individualsMost common in 6th - 7th decade  <response>: Vascular compression of third portion of the duodenum by the superior mesenteric artery as it passes over this portion of the duodenum. Also known as Wilkies syndrome, cast syndrome, and arteriomesenteric duodenal ileus or compression. An abnormally narrow, aortomesenteric angle.. An abnormally highly fixed transverse duodenum. An abnormal course of the mesenteric artery continuing inferiorly, anterior to the unyielding vertebral column. Most commonly seen in young asthenic individuals, with women being more commonly affected than men. SMA normally leaves aorta at an acute angle 50 - 60. Normally a mass of fat and lymphatics near origin of SMA is believed to protect duodenum from compression. 