Melanoma is a specific kind of skin cancer. Melanomas most commonly form on skin that has been exposed to the sun or another form of ultraviolet light (such as tanning beds). However, a melanoma can also form on areas of the body that have not had such sun exposure such as the soles of the feet or in-between toes. Melanomas can also develop internally. For external melanomas, a change in the appearance of a mole – size, shape, color, texture – or the development of a new skin growth, may be the first signs of the disease. Risk factors for melanoma include having fair skin that burns easily, having numerous moles, and a family history of the cancer. The diagnosis process usually begins by a trained medical provider identifying and/or confirming a suspicious looking mole. This can happen at a routine physical or during a skin check by a dermatologist. The doctor may use a specialized magnifying lens to get a closer look at the growth to determine if removal and biopsy (evaluating the tissue from the mole) should be performed. If laboratory testing confirms melanoma, follow-up testing will help determine the staging of the lesion.