Cancers are lesions with uncontrolled and abnormal skin cell growth. Squamous cell carcinomas (affects cells in the middle layer of the epidermis) and basal cell carcinomas (affects cells in the lowest layer of the epidermis) are the most common forms. Melanoma is less common, but much more dangerous.
Anyone can develop skin cancer, though the highest risk patients are those with fair skin and excessive sun exposure, and those using tanning beds, or having a family history of melanoma. Early detection is the key to successful treatment, so any suspicious skin lesion, or changes in the skin, should be evaluated by a board-certified dermatologist.