Lichen planus hypertrophicus

    Article Contributors: 
    Sean Klepper M.D.
    Stephen Lyle, M.D., ...

    Also known as: hypertrophic lichen planus

    Clinical Features:

    • Represents lichen simplex chronicus superimposed on lichen planus
    • Most common on the lower extremities, especially the shins
    • Presents as heavily pigmented warty plaques
    • Increased incidence in familial lichen planus
    • Controversial small risk of malignant transformation

    Histologic Features:

    • Similar features to classic lichen planus, with more pronounced hyperkeratosis and acanthosis
    • Pseudoepitheliomatous hyperplasia may sometimes be seen, mimicking squamous cell carcinoma.
    • The lymphocytic infiltrate my sometimes partially spare the papillary dermis.
    • Dermal scarring may occur.
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    Cases associated with this book:

  • Lichen planus hypertrophicus
    Author: Stephen Lyle, M.D., Ph.D.

    Conference: Teaching Collection