1990 Volume 51 Issue 7 Pages 1578-1583
We rarely encounter aneurysms in the abdominal visceral arteries, paticularly an inferior mesenteric aneurysm. This paper describes a case of inferior mesenteric aneurysm associated with aortitis syndrome in a 56-year-old woman. The patient was seen with the chief complaint of systoric murumur centering on the umbilical area. CT of the abdomen revealed a round tumor, 2cm in diameter with peripheral calcification on the left side of the aorta. With aortography, a diagnosis of aneurysm developed in the root of the inferior mesenteric artery was made. In anticipation of the risk of rupture, operation was performed. After aneurysmectomy, the right internal iliac artery and the drainage artery stump were anastomosed end to end to rebuild blood flow to the intestine. The aneurysm was a sacciform, 3.0×2.0×2.2cm in size, laterally protruding with a 2×1cm lacuna. Marked stenosis of te cut-off ends of the feeder artery was noted. Histologically, the internal elastic laminae of the aneuryms wall divaricated to disappear, and a remarkable calcification was obserbed. This aneurysm was diagnosed as poststenotic dilatation due to aortitis, secondarily added by arteriosclerotic changes.
