Sean Klepper M.D.
Artur Zembowicz M.D....
- Red papule or plaque on the lower extremities of middle-aged to elderly individuals
- Psoriasiform hyperplasia of the epidermis with fusion of the rete ridges
- Proliferation of pale ("clear") keratinocytes (polyhedral and larger than normal keratinocytes), sharply demarcated from the adjacent normal epidermis
- The clear cells are PAS positive, diastase sensitive (glycogen).
- Neutrophils may infiltrate the epidermis, sometimes forming microabscesses in the stratum corneum.
- Parakeratosis and crusting may be seen.