Lichen Planus Flashcards
What is lichen planus?
An inflammatory disorder characterised by the appearance of purple papules or plaques
What are the triggers for lichen planus?
Hepatitis C
Allergic contact dermatitis
Localised skin injury
Skin infection
What is the presentation of cutaneous lichen planus?
Purple plaques or papules that are:
- Pruritic
- Planar
- Polygonal
Wickham’s striae
Where are cutaneous lichen planus lesions usually found?
Flexor aspects of wrist and ankles
What are the features of oral lichen planus?
Mucosal ulceration
Wickham’s striae
What are Wickham’s striae?
White lacy lines found on the skin / oral mucosa
What are the differentials of lichen planus?
Psoriasis
Oral candidiasis
Eczema
Pityriasis rosea
What investigations are used in the diagnosis of lichen planus?
Hepatitis C testing
Patch testing
Biopsy
What is the management of lichen planus?
Topical corticosteroids
Oral steroids
Methotrexate or hydroxychloroquine
UV-B light therapy
