Melanoma is an aggressive form of skin cancer. If it is found early enough, it can be removed with no harm caused. But when detected late, it can be deadly. This article tells us about a new test that was recently discovered. This test, instead of looking at the changes in the sequence of DNA in skin cells, it looks at the changes in the methylation of the DNA. Methylation is the addition of a small chemical group to a base in DNA, and it does not change the sequence of DNA. The researchers conducting this study found a set of 22 genes that can be used to seperate melanoma from non-cancerous cells, based only on chang in methylation patterns.
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