Lichenoid disorders Flashcards
1
Q
What are lichenoid disorders?
A
Conditions characterised by damage to the basal epidermis, resulting in itchy, flat-topped, violaceous papules
2
Q
What is the main form of lichenoid disorder?
A
Lichen planus
3
Q
What are some examples of lichenoid disorders?
A
Discoid lupus
Drug rashes
Erythema multiforme
Toxic epidermal necrolysis
4
Q
How will lichen planus present on the skin?
A
6Ps:
Planar (flat-topped)
Purple
Polygonal
Pruritic
Papules and plaques
5
Q
How can lichen planus affect the mouth?
A
Formation of oral lesions (Wicham’s striae) which resent as lacy white lesions on the inside of the cheek
6
Q
What are some histological features of lichen planus on biopsy?
A
- Irregular saw tooth acanthosis
- Hypergranulosis and orthohyperkaratosis
- Band-like upper dermal infiltrates of lymphocytes
- Basal damage with formation of cytoid bodies (Dead epithelial cells in basal layer)
7
Q
How is lichen planus usually managed?
A
Topical steroid + antihistamine
8
Q
A
