南予医学雑誌　第17巻

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南予医誌　Vol.17　No. １　2016－52－Abstract　Superior mesenteric artery (SMA) syndrome is a rare disease that presents as an acute abdomen and is most common in thin young women. Here, we present a case of SMA syn-drome in a young man of average size.A 19-year-old man presented to our emergency department because of sudden-onset post-prandial abdominal pain, nausea, and vomiting. Abdominal computed tomography revealed a dilated stomach and duodenum containing massive amounts of uid because of a narrow-ing of the third part of the duodenum between the SMA and abdominal aorta. These typical imaging ndings conrmed that he had SMA syndrome. We treated him with a nasogastric tube to decompress the stomach and duodenum. The patient responded well to treatment and was discharged from hospital without sequela.When encountering an acute abdomen in a young man of average size, physicians should still consider the possibility of SMA syndrome with the typical imaging ndings.（Nan-yo Med J 2016; 17: 46-52.）Superior mesenteric artery syndrome in a young man of average size: a case reportMiku NAKAGAWA1)2), Masakazu HANAYAMA3), Tsutao OKAMOTO3),Akira FUKUI4), Masahiko KANEKO2)1)　Postgraduate Clinical Training Center2)　Department of Hematology3)　Department of Gastroenterology4)　Department of RadiologyUwajima City HospitalGoten-machi, Uwajima, Ehime 798-8510, Japan