DDx of Interface
Dermatitis
- Vacuolar
(cell-poor) interface dermatitis:
- Erythema multiforme
- Fixed drug
eruption
- Drug eruptions
- Viral exanthems
- HIV interface
dermatitis
- Connective tissue
disease
- lupus erythematosus
- dermatomyositis
- Graft-versus-host
reaction
- Pityriasis lichenoides
- Poikiloderma congenitale
- Bloom’s syndrome
- Vitiligo
- Pigmented purpuric dermatitis
- Lichenoid interface dermatitis:
- Lichen planus and variants
- Lichenoid drug eruption
- Lichenoid keratosis
- Lichen striatus
- Lichen nitidus
- Lichenoid purpura
- Porokeratosis
- Histologic regression of many tumours
References: