As fas as I know, cancer develops after a mistake during mitosis pass unnoticed for both from both the own cell mechanism of regulation and the inmunitary system. But this does not apply to brain cells because they don’t do mitosis yet you can develop cancer in the brain, so how?.
In: Biology
From Mayo clinic
>Secondary (metastatic) brain tumors are tumors that result from cancer that starts elsewhere in your body and then spreads (metastasizes) to your brain.
>Secondary brain tumors most often occur in people who have a history of cancer. But in rare cases, a metastatic brain tumor may be the first sign of cancer that began elsewhere in your body.
>In adults, secondary brain tumors are far more common than are primary brain tumors.
So you’re right, lots of times, brain cells aren’t the issue, and when it is, it’s during childhood, when brain cells are actually being created.
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