Radiation boost may help immunotherapy fight lung cancer
NCT ID NCT03176173
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tested whether adding high-dose, precisely targeted radiation to standard immunotherapy can improve outcomes for people with stage IV non-small cell lung cancer. Forty-five adults who were already on immunotherapy received radiation to some of their tumors. Researchers measured how long the cancer stayed under control and whether tumors shrank.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- image-guided radiation therapy (IGRT) plus immunotherapy (anti-PD-1 or anti-PD-L1)
- What this could lead to
- If it works, this combination could help control metastatic lung cancer better than immunotherapy alone.
- What could go wrong
- This is a small, completed phase II trial with only 45 participants. Results may not apply to all patients, and radiation can cause side effects like fatigue or lung inflammation.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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45 people
The number who actually took part.
- Started
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Jun 2017
- Finished
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Jan 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Has stage IV non-small cell lung cancer, or initially stage I-III disease with distant metastatic recurrence 2. Age ≥ 18 3. Has been receiving anti-PD-1 or anti-PD-L1 immunotherapy for at least four weeks (refer to section 4.2.1) 4. Has had restaging imaging after initiation of immunotherapy, at least 4 weeks after pre-immunotherapy baseline imaging. CT or PET/CT of at least chest/upper abdomen must be performed within 4 weeks prior to registration. For patients with history of brain metastases, brain MRI or CT is required within 4 weeks of registration; for other patients brain MRI or CT is required within 12 weeks of registration. Diagnostic PET/CT performed as part of radiation simulation can be used as the restaging imaging. 5. Most recent imaging shows measurable disease as defined by RECIST 1.1 6. Evaluation by a Stanford medical oncologist must show: 1. The patient is expected to continue on immunotherapy for at least three more months 2. Imaging must show response, stable disease, or modest progression 3. If there is modest progression, the patient must be clinically stable in terms of performance status and overall disease-related symptoms 7. Has at least one extracranial tumor safely treatable with radical-dose radiation therapy and that has not been previously treated with radiation 8. ECOG performance status 0-2 9. Has the ability to understand and the willingness to sign a written informed consent document. Exclusion Criteria: * Untreated brain metastases, if not planned to be treated in this course of radiation therapy * Pregnancy or women of childbearing potential not willing/able to use contraception during protocol treatment
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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
Locations
-
Stanford University, School of Medicine
Palo Alto, California, 94304, United States
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