Question

what is brain tumor?​

Answer 1

Explanation:

A cancerous or noncancerous mass or growth of abnormal cells in the brain.

Tumors can start in the brain, or cancer elsewhere in the body can spread to the brain

Answer 2

A brain tumor is a collection, or mass, of abnormal cells in your brain. Your skull, which encloses your brain, is very rigid. Any growth inside such a restricted space can cause problems. Brain tumors can be cancerous (malignant) or noncancerous (benign).A primary brain tumor originates in your brain.