The short answer
Some inherited genetic syndromes and a few exposures may raise the risk of an adult brain tumor. Many people with a brain tumor have no known risk factor.
Certain inherited genetic syndromes may raise the risk of brain and spinal cord tumors.
Exposure to vinyl chloride is listed by the NCI as a possible risk factor.
The NCI says evidence to date suggests cell phone use does not cause brain or other cancers.
Most people diagnosed with a brain tumor have no known risk factor at all.
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The whole article, with every detail and caution.
This page is for adults who want to know what causes brain and spinal cord tumors. It covers known risk factors and what is not a proven cause.
The simple version
Some inherited genetic syndromes and a few specific exposures may raise the risk of a brain or spinal cord tumor. Many people with a tumor have none of them.
Not every person with a known risk factor develops a brain tumor, and brain tumors can develop in people with no known risk factor at all.
What is known
- Inherited genetic syndromes. Several raise the risk of certain brain and spinal cord tumors. They include neurofibromatosis type 1 (NF1) and type 2 (NF2), von Hippel-Lindau disease, tuberous sclerosis, Li-Fraumeni syndrome, Turcot syndrome, and nevoid basal cell carcinoma syndrome.
- Chemical exposure. The National Cancer Institute lists exposure to vinyl chloride, a chemical used in some manufacturing, as a possible risk factor for a central nervous system tumor.
- Immune-related factors. Epstein-Barr virus, AIDS, and a history of organ transplant can each raise the risk of primary central nervous system lymphoma. That is a different tumor type that also affects the brain.
- Past radiation treatment. If you were treated with radiation to the head before, ask your care team what that means for you.
What is not a proven cause
People often worry about cell phones. The National Cancer Institute says the evidence to date suggests that cell phone use does not cause brain or other kinds of cancer in humans. U.S. studies found stable rates of adult gliomas over several decades. Cell phones give off non-ionizing radiofrequency energy, which is too low in energy to damage DNA. A large study of young people found no evidence of an association between wireless phone use and brain tumors.
You did not cause this
Many people with a brain tumor have none of the risk factors listed above. If you are searching for something you did that led to this, talk with your care team. Blaming yourself does not help.
Why this matters for you
If your family history suggests one of the inherited syndromes above, genetic counseling can clarify the risk for you and your relatives.
Sources
Common questions
What causes most brain tumors?
Often a single cause cannot be named. The NCI lists some inherited genetic syndromes and a few exposures as risk factors, but many people with a brain tumor have none of them.
Do cell phones or Wi-Fi cause brain tumors?
The National Cancer Institute says evidence to date suggests that cell phone use does not cause brain or other kinds of cancer in humans.
What genetic syndromes are linked to brain tumors?
Inherited conditions such as neurofibromatosis type 1 or 2, von Hippel-Lindau disease, tuberous sclerosis, and Li-Fraumeni syndrome are linked to a higher risk of certain brain tumors.
Did I do something to cause my brain tumor?
Many people with a brain tumor have none of the known risk factors. Blaming yourself does not help. Talk with your care team if this worries you.
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Last updated: 2026-10-16Next planned review: 2027-08-03
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Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes, and this is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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