Mucha-Habermann disease (PLEVA)
Histologic Features
- Parakeratosis beneath a basket-weave horn
- Extensive lymphocytic exocytosis with many necrotic keratinocytes
- Many erythrocytes within the epidermis
- Confluent epidermal necrosis
- Vacuolar alterations of the basal layer
- Marked edema of the upper dermis
- A dense lymphohistiocytic lichenoid infiltrate without eosinophils
- A wedge-shaped, superficial and deep perivascular lymphohistiocytic infiltrate
Updated Wednesday, July 31, 2013 8:30:48 PM