[Chinese expert consensus on the diagnosis and treatment of peritoneal metastasis of gastric cancer (2023 edition)].

China is a country with a high incidence of gastric cancer, and the majority of patients are in the advanced stage. The peritoneum is the most common site of metastasis and recurrence in advanced gastric cancer. Attention to the standardized diagnosis and treatment of peritoneal metastases of gastric cancer is expected to significantly improve the prognosis and quality of life of some patients. Based on evidence-based medicine and the internationally accepted Delphi method, this consensus revises the Chinese expert consensus on the prevention and treatment of peritoneal metastasis of gastric cancer (2017 edition), reaches a preliminary consensus on the definition, classification, risk factors, diagnosis and prediction, grade assessment, prevention, treatment and management of complications of peritoneal metastasis of gastric cancer, and provides guidance for clinical work.我国是胃癌高发国家，且以中晚期患者为主。腹膜是晚期胃癌最常见的转移和复发部位。重视胃癌腹膜转移的规范化诊治，有望使部分患者的预后和生活质量得到显著改善。本共识基于循证医学证据和国际通行的Delphi法，对《胃癌腹膜转移防治中国专家共识（2017版）》进行修订，在胃癌腹膜转移的定义、分类、高危因素、诊断和预测、程度评估、预防、治疗及并发症处理等方面达成初步共识，对临床工作提供指导。.