Duodeno-duodenal intussusception presenting as upper gastrointestinal bleed.

Duodeno-duodenal intussusception (DDI) is the type of intestinal intussusception in which a segment of the duodenum invaginates into the next part of the duodenum. We present a case of a male patient in his 50s presenting with right upper abdominal pain with multiple episodes of vomiting and a history of melena for 1 month. Imaging studies showed the presence of DDI without apparent growth. The patient underwent upper gastrointestinal endoscopy, which showed a doubtful growth in the duodenum, and the biopsy, was suggestive of adenocarcinoma. The patient underwent Whipple's procedure, and postoperative histology was diagnostic of Brunner's gland adenoma. The patient improved well without any complications.