Scientists sequencing 25 human metastatic melanomas found a link between melanoma and breast cancer, as well as a link between mutation rate and ultraviolet light exposure. The PREX2 gene, which is also found in some breast cancers, initiates cancerous activity when genetic mutations affect cell functions, the researchers report in the journal Nature. The findings may lead to new drug targets, said dermatologist Darrell Rigel, a past president of the ASDS.

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