Strokes after brain radiation in people with glioma
Original title: Stroke after cranial radiation in glioma: Phenotypic differences by concurrent bevacizumab exposure.
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 was a look back at patient records, so it raises a question rather than answering one.
The short version
Doctors checked whether a common drug made brain bleeding more likely after a stroke.
What was studied. Researchers looked back at records for 910 patients in one hospital registry. They found the patients who had a stroke after brain radiation. They checked who was taking bevacizumab, a drug used for brain swelling and tumor regrowth.
What they found. 91 of the 910 patients had a stroke after brain radiation, or 10.0%. Of those, 59 were taking bevacizumab and 32 were not. Bleeding inside the brain tissue was more common in the bevacizumab group, 32.2% against 15.6%. That gap was small enough that it could be chance.
What this means, and what it doesn't
What it could mean: This does not show that bevacizumab caused the bleeding. Among the patients who had brain bleeding, 31.6% of the bevacizumab group were also taking strong blood thinners. In the other group it was 0.0%. So the blood thinners may explain the gap. The authors think the two drugs together may raise bleeding risk. If you take both, it is fair to ask your doctor about that risk.
What it doesn't mean: This does not mean bevacizumab causes strokes or brain bleeds. The study only looked back at old records at one place. That kind of study cannot prove what caused what. Nothing here changes care today, and it is not a new treatment or a cure. The authors call it an early idea that needs a real study to test it.
Source: PubMed, September 3, 2026 · Read the original
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