Lab technician Amber Morris, right, and another DermTech employee analyze samples. DermTech is commercializing a scalpel-free test for skin cancer. Photo by Jamie Scott Lytle.

Lab technician Amber Morris, right, and another DermTech employee analyze samples. DermTech is commercializing a scalpel-free test for skin cancer. Photo by Jamie Scott Lytle.

Could that suspicious mole be cancerous? DermTech wants doctors to reach for a patch, not a scalpel...