A case of double duodenal neuroendocrine tumors in the vicinity of the papilla of vater discovered during upper gastrointestinal endoscopy

A 56-year-old man who had been diagnosed with an endocrine tumor near the duodenal papilla on screening upper gastrointestinal endoscopy, was admitted to our hospital. As the tumor was adjacent to the papilla of Vater, pylorus-preserving pancreatoduodenectomy was performed. The pathological findings of the specimen that had been resected from the vicinity of the papilla of Vater, identified a 4-mm tumor in the descending portion of the duodenum, which had been diagnosed preoperatively by endoscopy as a neuroendocrine tumor. An additional neuroendocrine tumor with a diameter of 3 mm was found in the boundary region of the Ab portion of the papilla and Bi portion of the lower bile duct. The patient is alive without recurrence more than 6 years and 7 months after the surgery.