An Unusual Cause of Obscure Gastrointestinal Bleeding

A 69-year-old man was admitted to our institution because of a 1-week history of intermittent passage of tarry stools. His medical history was remarkable for uraemia, with regular dialysis for 5 years. He had not received non-steroidal anti-inflammatory drugs or anticoagulants. Four months previously, he had been admitted to our institution because of tarry stool passage. Prior endoscopic examination, including colonoscopy …