There are two main types of tumors:
- Noncancerous (benign) — Slow growing tumors that do not spread to other parts of the body.
- Cancerous (malignant) — Faster growing tumors that are more difficult to treat, and usually destroy the surrounding brain tissue.
Cancerous brain tumors can be further classified as:
- Primary tumors originate in the brain and rarely spread throughout the body. They are named from the cells in which they originated, such as astrocytomas, oligodendrogliomas, and ependymomas.
- Secondary brain tumors (or brain metastases) originate from cancer cells in another part of the body and spread to the brain.