Multi-Society Guideline on Cytoreductive Surgery and HIPEC: Methodology and Overview of the Results.

To provide evidence-based guidelines about Peritoneal Surface Malignancy (PSM) treatment for the Peritoneal Surfaces Oncology Group International. The GRADE ADOLOPMENT method was used to adapt recommendations from the Italian Medical Oncology Association Guideline on PSM. Seven scientific society were involved to form five guideline panels composed of 28 medical professionals from 14 countries. Panelists prioritized 7 relevant questions. A knowledge synthesis team updated evidence and summarized information. The panel agreed on seven recommendations.