Can radiation kickstart the immune system against stubborn GI cancers?
NCT ID NCT04221893
First seen Jun 27, 2026 · Last updated Aug 14, 2026 · Updated 1 time
Summary
This study is for people with advanced gastrointestinal cancers that are growing despite immunotherapy. Researchers want to see if adding targeted radiation to one tumor can help the immune system attack other tumors throughout the body. About 28 participants will receive radiation while continuing their current immunotherapy. The goal is to slow or stop cancer progression and improve treatment response.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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John Muir Medical Center-Walnut Creek
NOT_YET_RECRUITINGWalnut Creek, California, 94598, United States
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University of California, San Francisco
RECRUITINGSan Francisco, California, 94143, United States
Contact Email: •••••@•••••
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