Abstract
Adenomyomas of the small intestine are very rare. We report one pediatric case of adenomyoma of the small intestine. A 6-month-old Japanese baby was admitted to our institution and underwent intracardiac repair for ventricular septal defect. He vomited postoperatively, and was diagnosed of intussusception. He received laparotomy on an emergency basis. The postoperative course was uneventful. Microscopically, the lesion, located within submucosa to muscularis propria, was composed of ducts of various sizes. These ducts were lined by columnar to cuboidal epithelia without connection to the intestinal mucosa, and surrounded by bundles of smooth muscle. Pancreatic acinars or islet cells were not present. Based on these findings, the lesion was diagnosed as adenomyoma.
