system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: How does brain tumors form when brain cells dont even regenerate and produce new cells?
gpt
Some brain cells do replicate, these are called glial cells and produce gliomas when they develop into masses. Glial cells are the supportive cells of the brain, not the neurons that conduct all the important electrical impulses of nervous tissue. Neurons are cells that typically don’t divide, however there are areas of the brain where neuron regeneration occurs at a limited level. As such, neurons can become cancerous, but it is less common.