Adenomyoma of the small intestine in an adult: a rare cause of intussusception

Abstract

Adenomyoma of the small intestine is an extremely rare entity characterized by a mixture of glandular structures lined by columnar epithelium, with intervening bundles of smooth muscle. We report a case of adenomyoma of the jejunum that caused intussusception in an adult. Histologically, the morphologic features are typical of adenomyoma and are noteworthy for the extensive cystic change.

Myoepithelial hamartoma causing small-bowel intussusception: a case report and literature review

“…We have found only 20 cases of jejunal and ileal MEH of intestinal type (Table 1) [1,2,[4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], thirteen of which caused intussusception. Ten of those cases appeared in the ileum, with a maximum diameter of 0.8-4.5 cm.…”

“…Kim [5] offered the term foregut choristoma to the already long list of lesion names, because all the elements, intestinal glands, pancreas tissues, duodenal tissues, and gastric glands found were embryologically of foregut origin. Recently, the names MEH, adenomyoma and adenomyomatous hamartoma have been used in the literatures [1,2,[5][6][7][8][9][10][11][12][13][14][15][16][17][18] when the elements are intestinal tracts. We reviewed the literature reports, on this intestinal type of MEH.…”

Ileal Adenomyoma: Extremely Rare Cause of Intussusception

“…Adenomyoma located in the small intestine most frequently present with intussusception. It may rarely cause ileus, and can be detected incidentally (1)(2)(3)(4). As the mass is small, none of the cases has been reported to be identified by imaging methods before surgery.…”

“…In the published English literature, the lesion was located in the ileum in approximately 75% of pediatric patients in whom the site of the lesion was determined, and Meckel's diverticulum was identified in 16.6% of them (1)(2)(3)(4)7). Adenomyoma located in the small intestine most frequently present with intussusception.…”

“…The lesion is predominantly located in the submucosa (4,6). Adenomyoma is differentiated from entities with similar macroscopic characteristics including enteritis cystica profunda, pneumatosis cystoides intestinalis, metastatic adenocarcinoma, and hamartomatous polyps of the Peutz-Jeghers syndrome based on histopathological criteria (1-4).…”