[Diagnostic difficulties in rare causes of gastrointestinal bleeding]. / Trudnosci diagnostyczne w rzadkich przyczynach krwawienia z przewodu pokarmowego.

Peptic and duodenal ulcer and haemorrhagic gastritis are the most common causes of gastrointestinal bleeding. Pathologic changes of the small intestine are rare and difficult to diagnose. The aim of the study is to evaluate the diagnostic strategy regarding patients with gastrointestinal bleeding of obscure origin. From 1996 to 1999, 626 patients were treated for gastrointestinal bleeding. There were difficulties in finding the source of bleeding in three out of 626 patients. Endoscopy of the upper and the lower gastrointestinal tract, hydrosonography of the large intestine and gastrointestinal passage were performed in these three patients. The site of bleeding was not determined after the above mentioned medical examinations. Three patients underwent exploratory laparotomy, and two of them also intraoperative endoscopy of the small intestine. One patient had tumor of the small intestine, and pathologic examination revealed leiomyoma. One patient had Meckel's diverticulum with presence of ectopic gastric mucosa diagnosed. One patient had inflammatory infiltration in the distal ileum. The presence of chronic, non-specific inflammation was proved by histologic examination. In case of patients for whom it was difficult to determine the source of gastrointestinal bleeding the very reason for such a bleeding is often found in the small intestine. It frequently happens that laparotomy and intraoperative endoscopy of the small intestine allows making the diagnosis.