To the Editor: Most melanomas are associated with UV radiation exposure. 1 Armstrong B.K. Cust A.E. Sun exposure and skin cancer, and the puzzle of cutaneous melanoma: a perspective on Fears et al. Mathematical models of age and ultraviolet effects on the incidence of skin cancer among whites in the United States. American Journal of Epidemiology 1977; 105: 420–427. Cancer Epidemiol. 2017; 48: 147-156 However, melanomas can emerge on sun-shielded skin such as the plantar surfaces.
