SUPERFICIAL AND DEEP PERIVASCULAR DERMATITIS

INTERFACE - LICHENOID

Lymphocytes predominate Eosinophhils sometimes, focal parakeratosis Lichenoid drug eruption
Individual necrotic keratinocytes sometimes Lichenoid photodermatitis
Individual necrotic keratinocytes, ballooning, spongiosis PLEVA
Basement membrane sometimes thicked, smudged interface, thinned epidermis focally DLE
Thinned epidermis, prominenet granular layer, parakeratosis GVHD
Abnormal lymphocytes in wedge-shaped infiltrate, often plama cells, eosinophils, and neutrophils, as well as small lymphocytes Lymphomatoid papulosis
Lymphocytes in epidermis, scant spongiosis Mycosis fungoides, plaque
Neutrophils, eosinophils and plasma cells prominent Abnormal lymphocytes in wedge-shaped infiltrate Lymphomatoid papulosis