What causes brain tumors?

Brain tumors are caused when abnormal cells in the brain grow and divide uncontrollably. These cancerous cells can form a tumor that can damage normal brain tissue.

There are many different types of brain tumors, and the cause can vary depending on the type of tumor. Some tumors are caused by genetic abnormalities, while others may be caused by environmental factors or exposure to radiation. However, in most cases the cause is unknown.