title: Annular ulcer of the stagnant ileum. A clinicopathological study on the morphogenesis.
abstract: Four cases of chronic annular ulcers of the stagnant ileum were described. The ulcers developed at the necks of the distended oral blind loops formed by side-to-side intestinal anastomoses in 3 cases and orally to the site of ileal stenosis by a congenital mesodiverticular band in one case. All ulcers were shallow and characterized by desmoplastic reaction and extensive veno-occlusive lesions. Arterio-occlusive lesions were sparse except for the youngest case. Intestinal ischemia caused by transient or recurrent ileal intussusception is the possible cause of these ulcers.
mesh_terms: D000328:Adult; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007077:Ileal Diseases / Q000209:etiology / Q000473:pathology*; D007422:Intestines / Q000098:blood supply; D007443:Intussusception / Q000150:complications; D007511:Ischemia / Q000209:etiology; D008297:Male; D014456:Ulcer / Q000473:pathology