A 51-year-old male visited a clinic because of anorexia and decreased bodyweight that the patient had recognized since June 2003. He was referred to our hospital because a submucosal tumor of the stomach was detected by upper endoscopic examination performed in the clinic. Upper gastrointestinal endoscopy revealed a protruded lesion with smooth mucosal surfaces on the anterior wall of the stomach, which extended from the central body of the stomach to the antrum. Abdominal computed tomography revealed mural hypertrophy mainly on the anterior wall of the gastric antrum and a cystic tumor. On August 5, 2003, the patient underwent an operation because of a suspicious malignant submucosal tumor of the stomach. Intraoperative findings indicated a clear border between the tumor and the pancreas ; thus, the tumor was considered primary gastric and distal partial gastrectomy was performed Pathohistological examination revealed ectopic pancreatic cystadenocarcinoma.
The reported incidence of ectopic pancreas in autopsy cases ranges from 0.55 to 13.7% ; it is rare to observe a tumor occurring from ectopic pancreas.
We report a case of pancreatic cystadenocarcinoma that is considered to be developed from ectopic pancreas of the stomach.
