Abstract
The safety of laparoscopic surgery for advanced gastric and pancreatic cancers has been established individually, but there is little evidence for synchronous cancers. In this case, a 59-year-old man with a history of R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisolone) treatment for diffuse large B-cell lymphoma underwent laparoscopic surgery for a suspected pancreatic invasion of advanced gastric cancer. Pathology revealed double cancer of the stomach and pancreas. Laparoscopic total gastrectomy and distal pancreatectomy were successfully performed. The patient had a pancreatic leak on postoperative day seven but was discharged from the hospital on postoperative day 21. This case suggests the possibility of expanding the indications for laparoscopic surgery for similar cancers in the future. Additionally, the anatomical reticulum can be resected as a single mass using laparoscopy alone.