Carcinoma arising in burn scar.

A 60-year-old man had under gone a left below-knee amputation 30 years ago owing to trauma and burn suffered in a dynamite explosion. He has been wearing an artificial leg since then. He developed a squamous cell carcinoma on the amputation stump 30 years later. The possible relationship of the burn scar and chronic irritation by the artificial leg to the cancer is discussed.