ASTRO's Guideline on Radiation Therapy for Gastric Cancer
Published: Web posted November 2025
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This guideline addresses three key questions on the use of radiation therapy (RT) for gastric cancer. These questions include indications for and timing of RT for patients with resectable and nonmetastatic gastric cancer; indications for and timing of RT in patients with unresectable locoregional disease, oligometastases and/or requiring palliation; and appropriate RT dose-fractionation regimens, target volumes and techniques in these clinical settings.
Developed in collaboration with:
Read guideline
This guideline addresses three key questions on the use of radiation therapy (RT) for gastric cancer. These questions include indications for and timing of RT for patients with resectable and nonmetastatic gastric cancer; indications for and timing of RT in patients with unresectable locoregional disease, oligometastases and/or requiring palliation; and appropriate RT dose-fractionation regimens, target volumes and techniques in these clinical settings.
Developed in collaboration with:
- American Society of Clinical Oncology
- European Society for Radiotherapy and Oncology
- Society for Surgical Oncology
- American Radium Society
- European Society for Radiotherapy and Oncology
- Royal Australian and New Zealand College of Radiologists
- Society of Surgical Oncology
