Researchers shine light on how some melanoma tumors evade drug treatment

The past year has brought to light both the promise and the frustration of developing new drugs to treat melanoma, the most deadly form of skin cancer. Early clinical tests of a candidate drug aimed at a crucial cancer-causing gene revealed impressive results in patients whose cancers resisted all currently available treatments. Unfortunately, those effects proved short-lived, as the tumors invariably returned a few months later, able to withstand the same drug to which they first succumbed. Adding to the disappointment, the reasons behind these relapses were unclear.

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