[Three Resected Cases of Metachronous Pancreatic Cancer Successfully Treated with Repeated Pancreatectomy].

Repeated pancreatectomy for metachronous pancreatic cancer has rarely been reported. We report 3 cases with metachronous pancreatic ductal carcinoma that developed after pancreatectomy for the first pancreatic cancer. They were successfully resected by removal of the remnant pancreas. In all 3 cases, the cancers in the remnant pancreas were treated with repeated pancreatectomy. The histological margin of the first pancreatic resection was cancer-free in all the cases. Furthermore, the second cancer tissue contained carcinoma lesions in situ adjacent to invasive ductal carcinoma. Based on these findings, the 3 patients were diagnosed with metachronous pancreatic cancers.