Teddi Mellencamp Arroyave had been aware of the “little patches of white” on her back for years but hadn’t thought anything of them. Then one day this past March, the Real Housewives of Beverly Hills star was running with her costar Kyle Richards, who observed that one of the spots had a black dot in the middle of it—and suggested Mellencamp see her dermatologist. Alarmed, Mellencamp booked an appointment that same week. “‘I’m 99 percent sure this one spot is skin cancer,’” she remembers the
