Management of gastric cancer peritoneal metastasis: International Gastric Cancer Association GCPM Working Group consensus statements.
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Boshier Piers R, Chia Daryl K A, Thrumurthy Sri G, Teh Jun Liang, Wobith Maria, Bencivenga Maria, Filippini Federica, Dumitra Teodora C, Burch Miguel, Kim Hyoung-Il, Kobitzsch Benjamin, Kodach Liudmila L, Quik Judith S E, Long Vo Duy, de Neijs Micha J, van der Sluis Pieter C, Leon-Takahashi Alberto M, Woo Yanghee, Chevallay Mickael, Framarini Massimo, Morgagni Paolo, Frejlich Ewelina, Grabsch Heike I, Markar Sheraz R, Marrelli Daniele, Park Do Joong, Sundar Raghav, Xu Zekuan, Linn Kay Khine, Yang Han Kwang, Kitayama Joji, Zhu Zhenggang, Rha Sun Young, Wijnhoven Bas, Yamashita Hiroharu, Yong Wei Peng, de la Fouchardière Christelle, Nilsson Magnus, Ishigami Hironori, Van Sandick Johanna W, Lordick Florian, Badgwell Brian D, So Jimmy B Y
Аннотация
METHODS: The International Gastric Cancer Association (IGCA) convened a multidisciplinary working group of 42 global experts from 15 countries to develop a total of 13 consensus statements addressing diagnosis, treatment, and research priorities for GCPM. Using ACcurate COnsensus Reporting Document (ACCORD)-compliant methodology, the group conducted systematic literature searches and applied a structured Delphi process with anonymous Likert-scale voting and a ≥70% consensus threshold to generate and refine consensus statements.
RESULTS: Consensus was achieved for all 13 statements among the working group during the first Delphi round, with 75-100% of respondents selecting either 'strongly agree' or 'agree'. Coefficient of variation values were ≤0.23. Polling of a broader group of experts (n = 66), which included members of the working group (n = 21), during a GCPM consensus session at the 16th International Gastric Cancer Congress (IGCC) in 2025 demonstrated agreement for 12 of the 13 statements. This broader group of experts, which had greater representation from medical oncologists, did not reach consensus (52% agreement) on best practice for systemic treatment of patients with GCPM, possibly due to the rapidly evolving developments in this field of metastatic gastric cancer.
CONCLUSION: This consensus exercise provides a foundation for globally relevant GCPM management strategies and highlights critical research needed to address significant evidence gaps that will improve patient outcomes.