Noneczematous Contact Dermatitis

Table 6

Histopathological characteristics of purpuric contact dermatitis (PCD) and vasculitis (V).

Criteria	PCD	V
Spongiosis	++	Negative
Subpapillary edema	+	++
Leukocytoclasis	Negative	++
Erythrocyte extravasation	+	+++
Neutrophilic perivascular infiltrate	+	+++
Vasal involvement	+	+++
C3-direct immunofluorescence	Negative	++