INTRAEPIDERMAL VESICULAR AND PUSTULAR DERMAITIS
SPONGIOSIS
| Lymphocytes | Superficial infiltrate | Allergic contactdermatitis/ Nummular dermatitis/ Dyshidrotic dermatitis/ Id reaction impetiginized |
| Hyphae in cornified layer | Dermatophytosis | |
| Vacuolar alteration, ballooning, necrotic keratinocytes | Erythema multiforme | |
| Superficial and deep infiltrate | Photoallergic dermatitis, early | |
| Eosinophils | Without striking intraepidermal vesiculation usually | Bullous pemphigoid/ Herpes gestationis/ Pemphigusvulgaris |
| Intraepidermal vesiculation | Allergic contactdermatitis/ Nummular dermatitis/ Dyshidrotic dermatitis/ Id reaction impetiginized |
|
| Focus of spongiosis and/orintraepidermal vesicle above apex of wedge-shaped infiltrate | Arthropod assault and simulators of it | |
| Neutorophils | Hyphae | Dermatophytosis |
| Neutrophils and eosinophils | Interface changes, ballooning, necrotic keratinocytes | Fixed drug eruption |