Straight and Chu feared Meffen’s spot could be melanoma, the deadliest form of skin cancer. “I know this might seem weird, but I just am a dermatologist,” Straight recalled to Insider about ...

In November 2022, two dermatologists on a train saw a stranger with an abnormal spot on his face. They spoke up, and the man, Chris Meffen, ended up going to a clinic to get it checked out.