2020 Volume 53 Issue 5 Pages 449-455
A 76-year-old man was emergently brought to our hospital because of dizziness. He was given a diagnosis of severe anemia, ascending colon cancer, and abscesses on the dorsal side, on contrast-enhanced abdominal CT. Percutaneous abscess drainage was performed, followed by laparoscopic right hemicolectomy. During the surgery, disseminated nodes were noted in the mesentery of the small intestine. Therefore, other regions of the small intestine were examined, revealing Meckel’s diverticulum, which was simultaneously resected. A tumor was found in Meckel’s diverticulum and we diagnosed Meckel’s diverticular adenocarcinoma based on postoperative pathological examination. Ectopic pancreatic tissue continuously surrounding the tumor and immunostaining findings led to a diagnosis of adenocarcinoma originating from ectopic pancreatic tissue. After surgery, chemotherapy was performed for peritoneal dissemination and hepatic metastasis. However, at 2 years and 3 months after surgery, the patient started to receive BSC. Adenocarcinoma is uncommon among patients with Meckel’s diverticulum, with only 21 cases, including ours, reported in Japan. We herein report a case of Meckel’s diverticular adenocarcinoma originating from ectopic pancreatic tissue, histopathologically detected by immunostaining.
