The Superior Mesenteric Artery Syndrome (SMAS) is associated with entrapment of the duodenum between the proximal superior mesenteric artery (SMA) and aorta.
Presentation: usually between 20 and 40 years of age
Clinical features:
(1) postprandial abdominal pain with or without cramping
(2) nausea and vomiting
(3) weight loss and dehydration
(4) high-pitched and hyperactive peristalsis during episodes
Imaging studies will show a narrow angle between the proximal superior mesenteric artery and the aorta, with compression of the duodenum. This is associated with a reduction in the mesenteric fat pad around the SMA.
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