Most brain tumors (abnormal growths) are metastases—secondary tumors from the spread of cancer elsewhere in the body. Primary brain tumors, originating in the brain itself, are less common.
Malignant tumors typically grow fast and spread through the brain. Nonmalignant tumors tend to grow slowly and remain in one area. Both types can compress brain tissue, impair brain function, and cause brain damage. Symptoms vary according to the part of the brain affected, but may include severe headaches, blurred vision, paralysis of part of the body, difficulty in speaking or understanding speech, personality changes, and seizures fits.
In some cases, there may be sudden pain and loss of consciousness.
Treatment may involve medication, radiation therapy, or surgery

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