DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Skin cancer. Squamous cell carcinoma (SCC) on the leg of an 84-year-old woman. An SCC arises from the uncontrolled proliferation of squamous cells, flattened cells in the skin and mucous membranes. It causes the formation of a large, ulcer-like area that, in its later stages, can spread to other parts of the body. This form of cancer is most commonly caused by sunlight.
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