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What is brain tumour??

Brain tumor

A brain tumor occurs when abnormal cells form within the brain.[2] There are two main types of tumors: malignant or cancerous tumors and benign tumors.[2] Cancerous tumors can be divided into primary tumors that start within the brain, and secondary tumors that have spread from somewhere else, known as brain metastasis tumors.[1] All types of brain tumors may produce symptoms that vary depending on the part of the brain involved.[2] These symptoms may include headaches, seizures, problem with vision, vomiting, and mental changes.[1][7][2] The headache is classically worse in the morning and goes away with vomiting.[2] More specific problems may include difficulty in walking, speaking, and with sensation.[1][3] As the disease progresses unconsciousness may occur.[3]

The cause of most brain tumors is unknown.[2] Uncommon risk factors include inherited neurofibromatosis, exposure to vinyl chloride, Epstein–Barr virus, and ionizing radiation.[2][1][3] The evidence for mobile phones is not clear.[3] The most common types of primary tumors in adults are meningiomas (usually benign), and astrocytomas such as glioblastomas.[1] In children, the most common type is a malignant medulloblastoma.[3] Diagnosis is usually by medical examination along with computed tomography or magnetic resonance imaging.[2] This is then often confirmed by a biopsy.[1] Based on the findings, the tumors are divided into different grades of severity.[1]

Treatment may include some combination of surgery, radiation therapy, and chemotherapy.[1] Anticonvulsant medication may be needed if seizures occur.[1] Dexamethasone and furosemide may be used to decrease swelling around the tumor.[1] Some tumors grow gradually, requiring only monitoring and possibly needing no further intervention.[1] Treatments that use a person's immune system are being studied.[2] Outcome varies considerably depending on the type of tumor and how far it has spread at diagnosis.[3] Glioblastomas usually have poor outcomes while meningiomas usually have good outco

Content created and supplied by: Cyrilbasil05 (via Opera News )


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