Abstract:Pterygium is an irreversible scarring of the nail matrix resulting in a split nail. The deformity is most often post-traumatic, though it can be the end result of aggressive inflammatory diseases involving the nail matrix like nail lichen planus, graft versus host disease, or autoimmune bullous disorders like cicatricial pemphigoid. It is thought to be a result of lymphocytic inflammation-mediated damage to the nail matrix, initiating a fibrotic process which slowly fuses the nail fold with the nail matrix and… Show more
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