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Melanoma is a form of skin cancer that starts in pigment-producing cells known as melanocytes. Melanoma can develop from an existing mole or other normal skin growth that becomes cancerous; however, many melanomas are new growths. If a melanoma becomes more persistent and involves multiple layers of skin, it can spread to other areas of the body. A large number of moles or other pigmented skin growths on the body, mostly more than 25, are prone to increased risk of developing melanoma. Melanoma is also a characteristic of genetic disorders of the skin such as xeroderma pigmentosum. In addition, people who have previously experienced melanoma are nearly nine times more likely to experience melanoma in the general population. About 85% of people with melanoma survive at least five years after being diagnosed, according to the survey.
Source link: https://medlineplus.gov/genetics/condition/melanoma
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