People who are at risk for melanoma, the deadliest type of skin cancer, typically must visit their dermatologist for a full body examination every six to 12 months. If a spot appears suspicious— such as a mole-like lesion that has been changing in size, shape, or color—the doctor usually will remove all or part of it, and send the biopsy to a diagnostic laboratory for analysis.
“It’s not a very good way to catch cancer early,” according to DermTech CEO John Dobak. It also might be unnecessary. Of the 12 million skin biopsies done in the United States each year, Dobak estimates that only about 3 million show evidence of cancer.
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