Abstract
Gastric cancer is the fifth most prevalent cancer worldwide and the third leading cause of cancer- related mortality. Peritoneal carcinomatosis can develop in patients with a primary gastric tumor in a substantial proportion of patients, with estimates ranging from 14% to 43%. For patients with peritoneal carcinomatosis from gastric cancer, therapeutic options are limited. Intraperitoneal chemotherapy, combined with hyperthermia (HIPEC), provides regional dose intensification within the peritoneal cavity, effectively targeting peritoneal carcinomatosis with minimal systemic exposure. We report a case of gastroesophageal junction adenocarcinoma with peritoneal metastasis successfully treated with of cytoreductive surgery and HIPEC, and followed by surgery and systemic chemotherapy, highlighting HIPEC as one of the viable options and the importance of a multimodal approach for the treatment of this case.