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[Ileal artery aneurysm: a case report and review of literature].

In a 70-year-old Japanese male who had a history of a radical operation of ruptured descending thoracic aortic aneurysm, the ileal artery aneurysm developed asymptomatically during postoperative follow up period. The aneurysm was about 10 by 4.5 by 4 cm in size and atherosclerosis microscopically. This case seemed to be the 20th case of superior mesenteric artery aneurysm and the 4th case of ileal artery aneurysm reported in Japan. Furthermore, this may be the first report of ileal artery aneurysm associated with thoracic aortic aneurysm in Japanese and English literature.