DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Skin cancer. Close-up of a nodular basal-cell carcinoma (skin cancer) on the pinna of a 74-year-old male patient. This is the most common form of skin cancer among fair-skinned people. It usually appears on the face and is thought to be caused by the ultraviolet radiation in sunlight. It slowly destroys surrounding tissue, but rarely spreads to other parts of the body. Treatments for basal cell carcinoma include radiotherapy, cryotherapy, cauterization and surgical excision.
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