Abstract
We report herein a case of ectopic pancreatic cancer in a 56-year-old man after surgery for gastric perforation. He presented with the complaint of vomiting and was diagnosed with gastric perforation, necessitating emergency surgery. After 3 months, he again presented with the complaint of vomiting, and computed tomography revealed gastric dilatation with pyloric stenosis. He was admitted to our hospital for further examination. We performed pyloric balloon dilatation by upper gastrointestinal endoscopy and mucosal biopsy of the pylorus several times. However, his symptoms did not improve, and the biopsy result did not indicate any malignant changes. However, he had elevated pancreatic tumor marker levels. We diagnosed a malignant submucosal tumor suggesting ectopic pancreatic cancer and performed distal gastrectomy. Histopathological examination revealed tubular adenocarcinoma derived from an ectopic pancreas in the stomach. The gastric perforation might have been caused by the cancer from the ectopic pancreas ; therefore, postoperative patients with gastric perforation should be carefully observed, considering the possibility of submucosal lesions.
