Background. - Early diagnosis of superior mesenteric artery syndrome,
less frequent in children than in young adults, is improved by the use
of ultrasonography and CT scan. Case report. - An eleven year-old boy
was admitted because he suffered from bilious vomiting for 24 hours.
A diagnosis of superior mesenteric artery syndrome was made from the r
esults of plain films of the abdomen, ultrasonography and roentgenogra
ms after instillation of dilute barium solution. Diameter of the the l
eft renal vein appeared increased. The patient was given fractionated
meals and placed in left lateral positon. The CT scan performed 5 days
later confirmed the diagnosis but did nor show dilatation of the left
renal vein. The patient is well one year later without treatment. Ult
rasonography performed 3 hours after a meal showed similar findings to
those seen in the acute phase. Conclusion. - Abdominal scanning and u
ltrasound are valuable tools for diagnosis of such a syndrome. The dia
gnostic value of dilatation of the left renal vein remains to be deter
mined.