PSEUDOCYST of the pancreas is a relatively rare disease entity usually preceded by alcoholic pancreatitis and heralded by abdominal pain and weight loss. A palpable abdominal mass is usually found in the upper abdomen, midline or slightly to the left. Anterior displacement of the stomach and duodenum on upper gastrointestinal series is noted in the majority of cases. These two cases are reported because of findings of arterial hemorrhage within both cysts. The usual finding in pancreatic pseudocyst is thin, brown fluid, occasionally blood-tinged. However, a report of a pulsatile cyst with arterial hemorrhage could not be found in reviewing the pertinent literature. Report of Cases Case 1. —A 67-year-old Negro man was admitted to the medical service of the Louisville Veterans Administration Hospital on July 23, 1964, with a history of confusion and disorientation for three months. During this period there was intermittent cramping, upper abdominal pain, occasional diarrhea,