Obstruction caused by erotopic gastric mucosa in small intestine: a case report

Ectopic gastric mucosa is very rare in clinic, and its pathogenesis may be closely related to embryonic development, the esophagus and the proximal duodenum (immediately adjacent to the stomach) are recognized as common sites. In contrast, ectopic gastric mucosa in the more distal segments of the small intestine (ileum) is exceptionally rare. We report a case of small intestinal (ileum) obstruction caused by ectopic gastric mucosa in a 38-year-old Chinese male patient. A male patient was admitted to the hospital with sudden abdominal pain and distension accompanied by stopped exhaust and defecation, abdominal CT examination revealed intestinal obstruction, after hospitalization, abdominal enhanced CT indicated small intestinal mass, and malignant lesions were considered, surgery was decided, The postoperative pathological result: ectopic gastric mucosa to small intestine. Ectopic gastric mucosa of the small intestine is an extremely rare entity that is difficult to distinguish from primary small bowel tumors, both benign and malignant. This diagnostic challenge frequently leads to misdiagnosis. Therefore, enhancing preoperative radiographic evaluation and utilizing intraoperative pathological consultation are crucial for accurate diagnosis.