DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Close-up of a malignant melanoma (cancer) on the skin of the arm of an adult patient. 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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