[A case of cryptogenic bleeding: degenerative cystic angiodysplasia of the right colon].

The authors report a case of gastro-intestinal bleeding due to arteriovenous malformation of the right colon: the angiodysplasia (AVMs-Moore's type 1). The investigations usually adopted in case of G.I. bleeding (x-Ray-examinations and endoscopy) are often unable to define the diagnosis. In this report the diagnostic importance of selective angiography in patients with lower intestinal blood loss is emphasized.