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Uncommon risk factors include genetic disorders, such as neurofibromatosis and Li–Fraumeni syndrome, and previous radiation therapy. [2] [3] Glioblastomas represent 15% of all brain tumors. [1] They are thought to arise from astrocytes. [9] The diagnosis typically is made by a combination of a CT scan, MRI scan, and tissue biopsy. [1]
The best-known risk factor is exposure to ionizing radiation, and CT scan radiation is an important cause. [10] [11] The dose-response for the relationship between low-dose ionising radiation and glioma risk is a risk increase of 55% per 100 milligray of radiation. [10]
Glioblastoma (GBM) is the most common and aggressive malignant brain tumor, accounting for about 15% of all primary malignant brain tumors. GBM invades normal brain tissue, so although it usually ...
A brain tumor occurs when abnormal cells form within the brain multiplies. There are two main types of tumors : malignant (cancerous) tumors and benign (non-cancerous) tumors. [ 2 ] These can be further classified as primary tumors , which start within the brain, and secondary tumors, which most commonly have spread from tumors located outside ...
The increased risk is believed to be due to the random chance of developing any cancer, the likelihood of surviving the first cancer, the same risk factors that produced the first cancer, unwanted side effects of treating the first cancer (particularly radiation therapy), and better compliance with screening. [203]
It can occur suddenly after a stroke or head injury, or develop slowly from a growing brain tumor or disease. ... Risk factors for strokes include age, gender, race, high blood pressure, diabetes ...
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