Gastro-intestinal haemorrhage unrelated to gastric mucosa diagnosed on 99Tcm pertechnetate scans.

Small-bowel bleeding due to an anastomotic ulcer in one patient and a haemangioma in another were diagnosed by 99Tcm pertechnetate scans. Multiple views of the abdomen during the scan proved essential. The rationale of this technique for imaging in cases of haemorrhage from the gastro-intestinal tract is described.