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Primary Brain Tumors
Primary brain tumors are tumors that start in the brain. There are many types and subtypes of primary brain tumors. They include gliomas (which include astrocytomas, oligodendrogliomas, and ependydomas), meningomas, medullablastomas, pituitary adenomas, and central nervous system lymphomas.
The exact causes of primary brain tumors are unknown. Genetic factors and inherited disorders play a role in some types of brain tumors.
Risk factors for brain tumors vary according to the type of tumor. Some types of tumors are more prevalent in men than in women. Some types of brain tumors usually occur in children, while others are more common in older people.
Survival rates in people with brain tumors depend on many different variables:
Brain tumors produce a variety of symptoms, including headache, seizure, and neurological changes. Symptoms may be subtle and gradually become worse or they may occur very rapidly.
Diagnosis of brain tumors involves a neurological exam and various types of imaging tests. Imaging techniques include magnetic resonance imaging (MRI), computed tomography (CT), and positron emission tomography (PET) scan. Biopsies may be performed as part of surgery to remove a tumor, or as a separate diagnostic procedure.
The standard approach for treating brain tumors is to reduce the tumor as much as possible using surgery, radiation treatment, or chemotherapy. Such treatments are typically used in combination with each other.
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