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Brain Tumor – Causes, Symptoms, Risk Factors and Types

Brain tumor is the name given to an abnormal mass of tissue in which some cells grow and multiply uncontrollably. Brain tumors quite often can be benign, in which case they do not spread to other areas of the brain and are likely to be removed successfully. Malignant tumors, however, tend to spread further, destroying healthy brain tissue and damaging other areas of the brain.
Brain tumors rarely spread to other parts of the body outside of the central nervous system (CNS). The CNS includes the brain and spinal cord.


– Radiation therapy to brain.
– Radiation exposure at head injuries.
– Family history of certain genetic disorders.


– Headaches which can be severe in the morning.
– Nausea and vomiting.
– Difficulty in thinking or speaking.
– Changes in the personality.
– Weakness
– Paralysis in one part or one side of the body.
– Loss of balance.
– Changes in vision.
– Confusion.
– Dizziness or disorientation.
– Memory loss.
– Eye abnormalities.
– Muscle weakness in face, arm or leg.
Brain tumor in children have symptoms like headaches, vomiting, loss of balance, vision problems, lack of coordination, fatigue, weakness, increase in size of head and behavioral changes. Pediatric brain tumors are not contagious. Their causes are unknown.


Primary Brain Tumors
– Tumors originate in brain.
– Tumors do not spread to other parts of the body.
– The most common primary brain tumors are gliomas, meningiomas, pituitary adenomas, vestibular schwannomas, primary CNS lymphomas, and primitive neuroectodermal tumors (medulloblastomas).
– Gliomas includes astrocytoma which occur in cerebrum and in children, they occur in the brain stem, the cerebrum, and the cerebellum. Brain stem glioma originate in lowest part of brain. Ependymoma glioma arises from cells that line the ventricles or the central canal of the spinal cord. Oligodendroglioma, a rare tumor arises from cells that make the fatty substance that covers and protects nerves.

Secondary Brain Tumors
– The cells spread to the brain from another tumor in a process called metastasis. So, secondary brain tumor is also called metastasis tumor.
– It begins in other part of the body like lung, breast, and kidney as well as malignant melanoma, a skin cancer.
– Secondary tumors are more common than primary tumors.
– Metastatic brain tumors are often referred to as brain metastases or lesions.

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