DR M.A. ANSARY / SCIENCE PHOTO LIBRARY DR M.A. ANSARY / SCIENCE PHOTO LIBRARY
Keloid scar on a patient's skin. A keloid is a greatly enlarged scar that grows beyond its original boundaries. It can itch, cause pain or be tender to the touch. Keloids consist of a mass of collagen, a tough fibrous protein, that forms as a result of a defective healing process. After a period of time most keloids flatten and cease to itch. Treatment, if required, is usually by re- excision and radiotherapy. Keloid scars are more common in people of African origin than in Caucasians.
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