PATHOLOGY

Detailed explanation-1: -Primary brain tumors include tumors that originate from the tissues of the brain or the brain’s immediate surroundings. Primary tumors are categorized as glial (composed of glial cells) or non-glial (developed on or in the structures of the brain, including nerves, blood vessels and glands) and benign or malignant.

Detailed explanation-2: -All brain cancers are tumors, but not all brain tumors are cancerous. Noncancerous brain tumors are called benign brain tumors. Benign brain tumors typically grow slowly, have distinct borders and rarely spread. Benign tumors can still be dangerous.

Detailed explanation-3: -They might start right in the brain or in the tissue nearby. Nearby tissue might include the membranes that cover the brain, called meninges. Brain tumors also can happen in nerves, the pituitary gland and the pineal gland. Brain tumors happen when cells in or near the brain get changes in their DNA.