Intraperitoneal therapy for gastric cancer peritoneal carcinomatosis

Gastric adenocarcinoma (GAC) is one of the most aggressive malignancies worldwide and has a poor prognosis. Multidisciplinary therapies are used in its treatment, but the prognosis for GAC patients with peritoneal metastases (PM) remains poor and there is no effective established approach.

This review summarizes the results of recent clinical studies and recent advances in the management, including surgery, chemotherapy, targeted therapy, and immunotherapy. In this review, keywords were searched in combination with 'peritoneal carcinomatosis' and 'gastric cancer' in PubMed, and then studies that evaluated peritoneal carcinomatosis associated with gastric cancer were identified through reading them. Several studies were quoted at second hand. Despite recent advances in therapeutic approaches such as systemic chemotherapy, immunotherapy, intraperitoneal chemotherapy, debulking surgery, thermal hyperthermic intraperitoneal chemotherapy, pressurized intraperitoneal aerosol chemotherapy, immunotherapy, and best supportive therapy, further studies are necessary. This review also summarizes molecular biology of GAC patients with PM.

Each modality is advancing and some have shown therapeutic effects, but none have become standard treatments that exhibit remarkable effects. To improve the prognosis of GAC patients with PM, large-scale clinical trials and further basic research are required.