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[kelis or Gr. chēlē, claw + -oid]
An exuberant scar that forms at the site of an injury or incision and spreads beyond the borders of the original lesion. The scar is made up of a swirling mass of collagen fibers and fibroblasts. Grossly it appears to have a shiny surface and a rubbery consistency. The most common locations for keloid formation are on the shoulders, chest, and back.
The injection of a corticosteroid sometimes helps the lesion regress. Freezing the tissue with liquid nitrogen, applying pressure dressings, treating it with lasers, excising it, or a combination of these treatments may be used, but recurrences are frequent.