pityriasis rubra pilaris
Histologic Features
- Columns of parakeratosis alternating with orthokeratosis
- Dilated follicular infundibula filled with keratotic plugs which show peripheral parakeratosis
- Thick suprapapillary plates
- Confluent hypergranulosis
- Irregular psoriasiform hyperplasia with short and broad rete ridges
- A very sparse superficial perivascular lymphohistiocytic infiltrate around dilated blood vessels
Updated Wednesday, July 31, 2013 8:30:48 PM