title: Chronic intussusception due to antral myoepithelioma.
abstract: Intussusception was seen on abdominal sonography and computed tomography in a 15-year-old boy who presented with a 6-week history of weight loss, vomiting, abdominal pain, abdominal mass, and hyperamylasemia. Laparotomy revealed a chronic gastroduodenal intussusception, the lead point of which was an antral myoepithelioma, a rare entity in this age group.
mesh_terms: D000293:Adolescent; D002908:Chronic Disease; D004379:Duodenal Neoplasms / Q000150:complications* / Q000473:pathology / Q000601:surgery; D006801:Humans; D007443:Intussusception / Q000209:etiology* / Q000601:surgery; D008297:Male; D009208:Myoepithelioma / Q000150:complications* / Q000473:pathology / Q000601:surgery; D011706:Pyloric Antrum; D013274:Stomach Neoplasms / Q000150:complications* / Q000473:pathology / Q000601:surgery