Prostate cancer that spread to the brain while the PSA test stayed low
Original title: Case Report: Clinicopathologic and molecular characteristics of prostate adenocarcinoma brain metastases despite disproportionately low PSA levels: a four-patient case series and narrative review.
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 on four past patients and a look at what is known, not a new result.
The short version
Prostate cancer can spread to the brain even when the PSA blood test looks low.
What was studied. Doctors reported on four men whose prostate cancer spread to the brain. Their PSA levels were low or only a little raised, from <0.01 to 6.5 ng/ml.
What they found. All four men had surgery to take out the brain tumor. They then had focused radiation and hormone treatment. Gene testing was done for three of them, and each had a different gene change. Two of the four had a lasting full remission. One stayed in remission but died of an unrelated cause. In one man the PSA rose again, but scans showed no new growth.
What this means, and what it doesn't
What it could mean: PSA is often used to follow prostate cancer. A low PSA does not rule out spread to the brain. If you have prostate cancer and new brain or nerve symptoms, a low PSA should not stop doctors from looking. You can ask about a scan of the brain.
What it doesn't mean: This is not a new treatment, and it is not a cure. It is a report on four men, not a trial. A report this small cannot show how often this happens, or which care works best. The treatments these men had are already in use today. Bigger studies are needed to learn more.
Source: PubMed, October 13, 2026 · Read the original
This plain-language summary was written by AI and published automatically after passing our automatic safety checks. How we write.