brain, spinal cord, and nerve disorders
Overview of Brain Tumors
Classification of Brain Tumors
There are two main types of brain tumors: Primary:These tumors originate in the cells within or next to the brain. They may be cancerous or noncancerous. Secondary:These tumors are metastases. That is, they originate in another part of the body and spread to the brain. Thus, they are always cancerous. 