A Case of Laparoscopic Resection of Rectal Metachronous Metastasis from Duodenal Cancer

A 73-year-old man with duodenal cancer underwent duodenojejunal segmental resection at a previous hospital. Abdominal CT performed 9 months after surgery showed an enhanced tumor in the right front wall of the lower rectum. Subsequent CT revealed that the tumor was growing gradually. Peritoneal disseminated recurrence from duodenal cancer was suspected and the patient was referred to our hospital for further examination and treatment. On FDG/PET-CT, the recurrence site was limited to a solitary peritoneal dissemination and was deemed resectable. The patient underwent laparoscopic low anterior resection, including resection of the peritoneal dissemination. Histopathological findings showed that the resected tumor was consistent with metastasis from duodenal cancer. Rectal metastasis of duodenal carcinoma is very rare and there is no established treatment. Resection may be an option in treatment for limited metastases from duodenal cancer.