A brain tumor is any intracranial tumor created by abnormal and uncontrolled cell division, normally either found in the brain itself (neurons, glial cells (astrocytes, oligodendrocytes, ependymal cells), lymphatic tissue, blood vessels), in the cranial nerves (myelin-producing Schwann cells), in the brain envelopes (meninges), skull, pituitary and pineal gland, or spread from cancers primarily located in other organs (metastatic tumors). Primary (true) brain tumors are commonly located in ...
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Signs and symptoms
... The signs and symptoms of a brain tumor depend on its size, location and rate of growth. A brain tumor — primary or secondary — can cause a variety of symptoms because it can directly pres...
Source: MayoClinic

... Physicians generally divide brain tumors into the following categories to explain where or how they originate: Primary. Primary brain tumors originate in the brain or close to it, such as in the skull...
Source: MayoClinic

Risk factors
... Because doctors don''t know exactly what causes primary brain tumors, it''s difficult to pinpoint risk factors. Brain tumors sometimes strike several members of a family, suggesting heredity may be a ...
Source: MayoClinic

When to seek medical advice
... Most headaches don''t signal a serious medical condition. But if you have headaches that progressively worsen, that are always in the same location or that are worse in the morning than in the afterno...
Source: MayoClinic

Screening and diagnosis
... The signs and symptoms of a brain tumor initially may be vague and come and go, making the diagnosis of a brain tumor difficult. Other diseases can cause similar signs and symptoms. Diagnosing a brain...
Source: MayoClinic