[Rare causes of hemorrhage from the digestive tract].

Some rare causes of intestinal bleeding, where diagnosing is difficult, have been shown. Cases of Meckel's diverticulum, leiomyoma and angiomas have been reported. The considerable help which can be expected from modern diagnostic procedures has been stressed, from screening using 99 m Tc Pertechnetate in diagnosing the Meckel's diverticulum and from selective angiography in diagnosing the other pathologic changes, mainly arteriovenous malformations.