Nummular dermatitis

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

    Clinical Features:

    • Pruritic nummular (coin-shaped) crusted plaques on the extensor surfaces of the extremities, most commonly affecting older adults

    Histologic Features:

    • The typical features of spongiotic dermatitis are seen, without any characteristic features.
    • Intraepidermal vesicles may be present.
    • Similar to what is seen in delayed-type hypersensitivity reactions, clusters of Langerhans cells and eosinophils may be seen.
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    Cases associated with this book:

  • Nummular dermatitis
    Author: Stephen Lyle, M.D., Ph.D.

    Conference: Teaching Collection