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The following is a list of the most frequently diagnosed benign brain tumors: An adult central nervous system tumor is a disease in which abnormal cells form in the tissues of the brain and/or spinal cord.There are many types of brain and spinal cord tumors.These are called metastatic brain tumors (or brain metastases).Metastatic brain tumors are more common than primary brain tumors.Tumors that start in the brain are called primary brain tumors.Primary brain tumors may spread to other parts of the brain or to the spine. Often, tumors found in the brain have started somewhere else in the body and spread to one or more parts of the brain.
The prognosis is worse than a grade I meningioma because the tumor usually cannot be completely removed by surgery.
A germ cell tumor forms in germ cells, which are the cells that develop into sperm in men or ova (eggs) in women. These include germinomas, teratomas, embryonal yolk sac carcinomas, and choriocarcinomas.
Germ cell tumors can be either benign or malignant.
The tumors may be either benign (not cancer) or malignant (cancer): When a tumor grows into or presses on an area of the brain, it may stop that part of the brain from working the way it should.
Both benign and malignant brain tumors cause signs and symptoms and need treatment.