title: Pancreatic pseudocyst manifesting as massive upper gastrointestinal bleeding.
mesh_terms: D000328:Adult; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D008297:Male; D010181:Pancreatic Cyst / Q000175:diagnosis*; D010192:Pancreatic Pseudocyst / Q000150:complications / Q000175:diagnosis*