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Study identifier: NCT04402788 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Testing the Addition of Radiation Therapy to the Usual Immune Therapy Treatment (Atezolizumab) for Extensive Stage Small Cell Lung Cancer, The RAPTOR Trial

Condition: Extensive Stage Lung Small Cell Carcinoma  ·  Sponsor: National Cancer Institute (NCI)

PhasePhase 2/Phase 3
Planned participants138
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

This phase II/III trial compares the effect of adding radiation therapy to the usual maintenance therapy with atezolizumab versus atezolizumab alone in patients who have already received atezolizumab plus chemotherapy for the treatment of small cell lung cancer that has spread outside of the lung or to other parts of the body (extensive stage). Immunotherapy with monoclonal antibodies, such as atezolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Radiation therapy uses high energy x-rays to kill tumor cells and shrink tumors. Giving radiation therapy in addition to atezolizumab may extend the time without extensive small cell lung cancer growing or spreading compared to atezolizumab alone.

This description comes directly from the study's public registry record.

Talk to the study team

Contact details are listed per location below or on the registry record.

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Locations (416)

University of Alabama at Birmingham Cancer CenterBirmingham, Alabama, United StatesActive Not Recruiting
Katmai Oncology GroupAnchorage, Alaska, United StatesRecruiting
Cancer Center at Saint Joseph'sPhoenix, Arizona, United StatesRecruiting
Mayo Clinic Hospital in ArizonaPhoenix, Arizona, United StatesSuspended
Mayo Clinic in ArizonaScottsdale, Arizona, United StatesSuspended
Banner University Medical Center - TucsonTucson, Arizona, United StatesActive Not Recruiting
University of Arizona Cancer Center-North CampusTucson, Arizona, United StatesActive Not Recruiting
NEA Baptist Memorial Hospital and Fowler Family Cancer Center - JonesboroJonesboro, Arkansas, United StatesRecruiting
UCI Health - Chao Family Comprehensive Cancer Center and Ambulatory CareIrvine, California, United StatesRecruiting
UC Irvine Health/Chao Family Comprehensive Cancer CenterOrange, California, United StatesActive Not Recruiting
Palo Alto Medical Foundation Health CarePalo Alto, California, United StatesSuspended
Sutter Cancer Centers Radiation Oncology Services-RosevilleRoseville, California, United StatesSuspended

+ 404 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT04402788