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Understanding skin cancer

A: Skin cancer can appear in several forms. Basal cell carcinoma often looks like a pearly or waxy bump. Squamous cell carcinoma might appear as a firm, red nodule or a flat lesion with a scaly crust.
Brown spots on skin affect nearly everyone, often due to sun exposure. Melanoma rates have increased dramatically over the last 20 years. Any mole that changes size, shape, or color should be ...