DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Close-up of the heel of the foot of an elderly female patient, showing malignant melanoma. This type of skin cancer arises from the pigment cells (melanocytes) and is an aggressive cancer that often spreads (metastasises) to other parts of the body. The main cause is exposure to ultraviolet radiation in sunlight.
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