Experts established clear guidelines for handling gastric cancer with peritoneal metastasis, crucial for improving patient outcomes.

• Consensus reached on 13 statements regarding diagnosis and treatment, with 75-100% agreement among 42 experts.
• A broader expert group, including medical oncologists, showed 12 of 13 statements agreed upon but struggled with systemic treatment consensus (52%).

These guidelines aim to standardize care and spotlight urgent research needs in this complex area.