screening

  A 62-year-old man presented with anemia (hemoglobin level of 6.9 g/dL). He had a 3-month history of intermittent painless melena. However, the underlying cause of the bleeding had not been identified despite extensive investigations, including upper gastrointestinal (GI) endoscopy, colonoscopy, and small bowel capsule endoscopy. Abdominal contrast-enhanced computed tomography (CT) showed a nonenhancing cystic lesion located at the pancreatic...