Superior mesenteric artery syndrome
Chronic abdominal pain with weight loss.
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Abnormal reduction of the aortomesenteric distance (up to 4 mm) as well as the aortomesenteric angle (14 degrees). Following administration of an oral contrast materiel, the markedly attenuated duodenal segment passing within the aortomesnteric distance is well demonstrated being poorly filled with contrast medium.The rest of the study is unremarkable.
Although the stomach and first two segments of the duodenum appear normal without dilatation, superior mesenteric artery syndrome may be responsible for the patient's symptoms. The presence of reduced aortomesenteric distance and aortomesenteric angle in a young female with unexplained weight loss and anorexia makes this diagnosis possible.
Superior mesenteric artery syndrome has a slight female preponderance and common in the age group of 10 to 39 years. On CT, the two crucial signs of diagnosis are reduced aortomesenteric angle and an aortomesenteric distance of less than 8 mm.