how are brain tumors develop?
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Primary brain tumors begin when normal cells acquire errors (mutations) in their DNA. These mutations allow cells to grow and divide at increased rates and to continue living when healthy cells would die. The result is a mass of abnormal cells, which forms a tumor.
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Doctors know that breast cancer occurs when some breast cells begin to grow abnormally. These cells divide more rapidly than healthy cells do and continue to accumulate, forming a lump or mass. Cells may spread (metastasize) through your breast to your lymph nodes or to other parts of your body.
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Other Types of Brain Tumors Hemangioblastomas are slow-growing tumors, commonly located in the cerebellum. They originate from blood vessels, can be large in size and often are accompanied by a cyst. These tumors are most common in people ages 40 to 60 and are more prevalent in men than women.
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These lesions make it difficult for messages to be sent and received properly between the brain and the rest of the body. Tumors: Tumors are clumps of cells that grow abnormally from normal tissue. Some tumors in the brain are noncancerous, or benign. Others are cancerous.
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Brain tumours are graded 1-4 according to their behaviour, such as the speed at which they are growing, and how likely they are to spread into other areas of the brain. Over time, some brain tumour's behaviour can change and the tumour may become, or come back as, a higher grade tumour.
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Tumors: Tumors are types of brain lesions and may be benign (meningiomas are the most common) or malignant like glioblastoma multiforme. Tumors in the brain may also be metastatic, spreading from cancers that arise primarily from another organ. Symptoms occur depending upon the location and size of the tumor.
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Primary brain tumors originate in the brain itself or in tissues close to it, such as in the brain-covering membranes (meninges), cranial nerves, pituitary gland or pineal gland.
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Causes of non-cancerous brain tumours you have a genetic condition that increases your risk of developing a non-cancerous brain tumour – such as neurofibromatosis type 1, neurofibromatosis type 2, tuberous sclerosis, Turcot syndrome, Li-Fraumeni cancer syndrome, von Hippel-Lindau syndrome, and Gorlin syndrome.
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When a person is diagnosed with a brain tumor, changes in behavior and thinking occur in most patients at some point during their treatment. Changes in behavior may include mild memory loss, mood swings, or intense emotional outbursts.
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Brain lesions are a type of damage to any part of brain. Lesions can be due to disease, trauma or a birth defect. Sometimes lesions appear in a specific area of the brain. At other times, the lesions are present in a large part of the brain tissue.
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If your brain tumour can't be cured. Some brain tumours grow very slowly (low grade) and cannot be cured. Depending on your age at diagnosis, the tumour may eventually cause your death. Or you may live a full life and die from something else.
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Age: The frequency of brain cancer increases with age, with more occurrences in individuals age 65 and older. The age factor varies depending on the cell type and location of the tumor. Adults have a very low risk of developing medulloblastomas, while gliomas are most common in adults.
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Many different types of brain tumors exist. Some brain tumors are noncancerous (benign), and some brain tumors are cancerous (malignant). Brain tumors can begin in your brain (primary brain tumors), or cancer can begin in other parts of your body and spread to your brain (secondary, or metastatic, brain tumors).
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Surgery is the usual treatment for most brain tumors. To remove a brain tumor, a neurosurgeon makes an opening in the skull. This operation is called a craniotomy. Whenever possible, the surgeon attempts to remove the entire tumor.
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Esophageal cancer occurs when cells in the esophagus develop changes (mutations) in their DNA. The changes make cells grow and divide out of control. The accumulating abnormal cells form a tumor in the esophagus that can grow to invade nearby structures and spread to other parts of the body.
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1) Brain cancers are rare. In the US, the incidence (that is, the number of newly diagnosed cases per year per 100,00 population) of all brain cancers is 6 cases per 100,000. (By contrast, the incidence of breast cancer is 125 per 100,000, and that of prostate cancer is 120 per 100,000).
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Grade I brain tumors may be cured if they are completely removed by surgery. Grade II — The tumor cells grow and spread more slowly than grade III and IV tumor cells. They may spread into nearby tissue and may recur (come back).