Testing whether focused radiation can be left out after surgery for cancer that spread to the brain
Original title: OBSERVE: A Pilot Study Of Omission Of Brain Metastasis Stereotactic Radiosurgery Following Resection With CNS-Active Systemic Therapy
How far along is this research?
This is a trial that is enrolling or has been updated. It is not a finding yet.
No phase is listed for this study, so all we know is that it is still being tested in people.
Status: Recruiting. It is looking for patients now. Talk to your care team about whether it fits you.
The trial team last updated this record on . Always check the trial page for the latest.
The short version
This study looks at skipping the usual radiation after brain surgery in people who take cancer medicine that works inside the brain.
Who this trial is for. This study is for people who had cancer that spread to the brain taken out by surgery, and who are taking cancer medicine that works inside the brain. It tests leaving out the focused radiation that is usually given after that surgery.
Where it stands. This study has not reported results. Doctors usually give radiation after this surgery to lower the chance the cancer comes back in the spot where the tumor was removed. The study is looking at what happens when that radiation is left out. The answer is not in yet.
What this means, and what it doesn't
What it could mean: If this sounds like your situation, you could ask your care team about it. They know your case and can say whether it fits. For now, this does not change what standard care looks like.
What it doesn't mean: This does not mean leaving out radiation is proven to work or proven to be safe. A trial is a test, not a proven treatment. Joining one is not a guarantee that it will help you. It is not a promise of a cure.
Source: ClinicalTrials.gov, August 3, 2026 · Read the original
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