Abstract
The isomorphic response of Koebner, also known as the Koebner phenomenon, is a well-recognized dermatologic manifestation first described in psoriasis. The isomorphic response occurs when a dermatologic disease develops at a site of normal-appearing skin that is injured in some manner.1 Chronic graft-versus-host disease (cGvHD) is a multisystem disorder that commonly affects the skin and may present with protean manifestations. Sclerotic cGvHD features are categorized as lichen sclerosus-like, morphea-like, or sclerosis involving the subcutaneous tissue and fascia.2 Morphea-like lesions of cGvHD are characterized by localized dyspigmented indurated plaques of skin thickening.
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