ULCERATIVE-COLITIS AND ANGIODYSPLASIA AS A CAUSE OF LOW ABDOMINAL HEMORRHAGE

We decribe a case of a patient with previously diagnosed of ulcerative colitis, who was admitted to the hospital because of rectal bleeding and abdominal pain. A mild active colitis was reported by colonoscopy with biopsy. Rectal bleeding relapsed, and an arteriovenous malformati on in the transverse colon compatible with angiodysplasia was located by early vascular scintigraphy with (99m)technetium-labeled red blood cells. This finding was confirmed by selective arteriography. Four mon ths after hemicolectomy, the patient is free of rectal bleedings. Labe led red blood cell scintigraphy may be useful to diferential diagnosis of lower digestive hemorrhage.