A brain tumor from lung cancer shrank after an immune drug
Original title: Significant Intracranial Response and Long-term Survival after Pembrolizumab in Non-small Cell Lung Cancer Brain Metastases Resistant to Stereotactic Radiotherapy.
How far along is this research?
- Lab cells
- Animals
- Review
- Tested in people
This was tested in people. That is the most reliable kind of research we share.
This is a report about just one patient, not a trial.
The short version
One man's brain tumor kept growing after radiation, then it shrank after he got an immune drug.
What was studied. This is a report about one patient. He was a 48-year-old man with lung cancer that had spread to his brain. Surgery and radiation did not stop the tumor. He had seizures and was very ill. Doctors then gave him a drug called pembrolizumab, which helps the immune system fight cancer.
What they found. At first he seemed to get worse. But the tumor shrank fast within 1 month. His brain symptoms got much better, and no sign of the cancer was left. He was still alive more than 7 years later, and he got no other cancer drug.
What this means, and what it doesn't
What it could mean: For some people whose brain tumors keep growing after radiation, this kind of immune drug may be worth asking about. His doctors think the earlier radiation may have helped the drug work. A care team can say if it fits your own case.
What it doesn't mean: This is one person's story, not a study of many people. One case cannot show how often this works or who it will help. It does not mean the drug will do the same for anyone else. It is not proof, and it is not a cure. Do not change your care based on this report. Talk with your own care team first.
Source: PubMed, August 25, 2026 · Read the original
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