A spinal fluid test that looks for tumor DNA
Original title: Early experience with cerebrospinal fluid cell-free DNA molecular profiling in a neuro-oncology practice.
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.
The test was used in people, but only as research at one hospital.
The short version
A spinal fluid test found tumor DNA in some patients, but not in most.
What was studied. Doctors studied spinal fluid from seventy-six patients at one hospital. The fluid came from spinal taps the patients already needed. Each sample was tested for small pieces of tumor DNA.
What they found. The test found tumor DNA in 20 patients (26%). It found no tumor DNA in 29 patients (38%), and 27 patients (36%) did not give enough DNA to test well. Patients whose test found tumor DNA lived a shorter time than the other patients.
What this means, and what it doesn't
What it could mean: This test may help doctors answer hard questions. It could help when a scan is unclear, or when a spot in the brain has no known cause. But right now the test often gives no clear answer.
What it doesn't mean: This does not mean the test is ready for everyday care. It was research at one hospital, and the doctors looked back at past records. More than a third of the samples did not have enough DNA to test well. The test is not a treatment, and it is not a cure.
Source: PubMed, October 3, 2026 · Read the original
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