Melanoma signs & symptoms
Melanoma is a type of skin cancer that affects melanocytes, or the cells that produce the skin pigment melanin. The U.S. Centers for Disease Control and Prevention says that the sun's UVB rays stimulate melanocytes, and more than 90 percent of melanomas are thought to be caused by ultraviolet exposure. Melanoma can exhibit different symptoms depending on the part of the body it is affecting, and may not affect everyone in the same way. The following are some of the signs and symptoms of melanoma.