Medical Definition of Keloid

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Keloid: A scar that rises quite abruptly above the rest of the skin. It is irregularly shaped, usually pink to red in color, tends to enlarge progressively, and may be harder than the surrounding skin. Keloids are a response to trauma, such as a cut to the skin. In creating a normal scar, connective tissue in the skin is repaired by the formation of collagen. Keloids arise when extra collagen forms. Susceptibility to keloids is genetic, and keloids are particularly common in people of African descent.

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Reviewed on 12/12/2018

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