Brain tumor types and survival differ by race and ethnicity
Original title: Differences in Primary Molecular Subtype Distribution Contribute to Racial and Ethnic Disparities in Adult-Type Diffuse Gliomas.
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 study of records from people already diagnosed, not a treatment you can get.
The short version
A large U.S. study found that the type of brain tumor people get, and how long they live, is not the same across racial and ethnic groups.
What was studied. Researchers used two national databases to study adults with glioma: A tumor that starts in the glial cells, the support cells of the brain and spinal cord. Gliomas are graded 1 to 4 by how fast they tend to grow. See the glossary, a kind of brain tumor. They counted 68,172 new glioma cases diagnosed from January 1, 2018 to December 31, 2022. They also looked at how long people lived, up to four years after diagnosis.
What they found. The most common tumor type was IDH-wildtype glioblastoma: The fastest-growing type of glioma (grade 4). Treatment usually starts soon after diagnosis: surgery first, then radiation and chemotherapy. See the glossary, with 51,548 cases. Non-Hispanic White people had higher rates of all gliomas than other groups. Non-Hispanic Black people had the lowest rates of several other glioma: A tumor that starts in the glial cells, the support cells of the brain and spinal cord. Gliomas are graded 1 to 4 by how fast they tend to grow. See the glossary types, including IDH gene change: A small change in a tumor's IDH gene. Tumors with this change often grow more slowly and may respond to different treatments. Your pathology report says whether your tumor has it. See the glossary astrocytoma and oligodendroglioma. In every racial and ethnic group, four year survival was lowest for IDH-wildtype glioblastoma.
What this means, and what it doesn't
What it could mean: This does not change anyone's treatment. It shows that different groups are diagnosed with different tumor types, and that survival is not the same across groups. The tumor's biology may be part of the reason. It can help to ask your doctor exactly which glioma: A tumor that starts in the glial cells, the support cells of the brain and spinal cord. Gliomas are graded 1 to 4 by how fast they tend to grow. See the glossary type you have, since the type shapes what to expect.
What it doesn't mean: This is not a new treatment or a cure. It is a look back at health records, so it cannot prove what causes these differences. It does not predict what will happen to any one person, and your race or ethnicity does not decide how you will do. Nothing here changes the care your doctor can offer you today.
Source: PubMed, July 14, 2026 · Read the original
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