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 |