Patinets with peritoneal metastasis have limited treatment and poor prognosis. Evidence has shown that there are T lymphocates and macrophages in the ascites microenviroment.We suggested the Intraperitoneal infusion of PD-1 inhibitor might activate T cells and produce anti-tumor effect.The intraperitoneal infusion of PD-1 inhibitorand combined with PRaG(Intravenous injectionof PD-1 inhibitor, Radiotherapy and GM-CSF）might benefit the survival of patients with peritoneal metastasis of advanced malignant tumors with malignant ascites. It is planned to determine the safety in phase I clinical trial. Further through phase II clinical trials, to clarify the effectiveness of this therapy.
The effect and safety of intraperitoneal infusion of PD-1 inhibitor is unclear for patients with peritoneal metastasis of advanced malignant tumors and malignant ascites. It is planned to determine the safety and efficacy of intraperitoneal infusion of PD-1 inhibitor combination with PRaG therapy.