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can you or where do you test for a gene for glioblastoma?

my grandmother died in 1943 from a brain tumor (cancer) at 46 years old...my cousins daughter now has glioblastoma..is there a way to test for this gene? thanks
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Avatar universal
No. I would talk to the genealogists.  Certain things skip, or are recessive... or may be passed down on the paternal side as well, not just maternal so one clear may not be enough. I would ask the doctor.
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Yes. The gene has been indentified.  You would contact a cancer center near you and they would have a genetic doctor working there, and they can do the testing (if insurance pays for it, the tests are quite costly). They can also arrange for counseling.

In my own experience I can tell you having a gene does not mean you will or will not get something. Hashimoto's runs in our family. I have it and my brother does not. My brother has the gene! I got breast cancer as as so many of my family for generations... no BRCA.
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thanks...do you know if my mother tested negative for the gene would that mean that us kids don't need to test for it? thanks
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