DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Old ulcerated corn. Close-up of an old ulcerated corn between the toes of a 73-year-old male patient. Corns (also known as a callosity or clavus) are areas of thickened skin caused by pressure or friction. They are commonly found on the feet and hands.
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