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.

Cases associated with this book:

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

Conference: DermatopathologyConsultations.com Teaching Collection