[A case of hemosuccus pancreaticus caused by rupture of an aneurysm of the splenic artery].

Hemorrhage through the pancreatic duct into the duodenum, the so-called "hemosuccus pancreaticus", is a rare cause of gastrointestinal bleeding. A 75-year-old man, who was treated with anticoagulation agents for an old myocardial infarction, was admitted to our hospital for sudden tarry stools and abdominal pain. His hemoglobin level slightly dropped to 12.6g/dL. His liver function tests results and the serum amylase level were elevated. A second upper gastrointestinal endoscopy revealed continuous bleeding from the ampulla of Vater. A rupture of an aneurysm of the splenic artery to the pancreatic duct was suggested by abdominal computed tomographic scan, abdominal magnetic resonance imaging, celiac arteriography, and endoscopic ultrasonography. The conservative treatment of stopping the bleeding with anticoagulation agents was successful.