TWO CASES of duodenal tumor are presented. Both were diagnostic problems. The question of the possible existence of primary intestinal melanoma is discussed.
Report of Cases
—A 54-year-old white man developed melena and was admitted to another hospital. Physical examination was unremarkable. The hemoglobin level was 9.8 gm/100 ml and rose to 11.8 gm/100 ml after transfusion of two units of blood. Radiologic examination of the stomach and duodenum was reported to show a small ulcer niche near the apex of the bulb. He was treated medically and discharged in 12 days.One year later melena again appeared. It stopped after two weeks of medical therapy at home.Three years later the patient was admitted to Hospital of the University of Pennsylvania for the first time with melena of one days duration and six weeks of sharp postprandial epigastric pain associated with heartburn. There were no positive