Pyoderma gangrenosum – low magnification
LEGEND
Altered epidermis: necrotic or ulcerated, sometimes pustular
Occasionally, pseudoepitheliomatous hyperplasia is seen at the edge of the ulcer
Secondary leukocytoclastic vasculitis may be present
Diffuse, dense and confluent neutrophil infiltrate in the dermis
Pyoderma gangrenosum – high magnification
LEGEND
Diffuse infiltrate of neutrophils and neutrophil debris in the dermis
Red blood cell extravasation
