Lichen planus
Lichen planus is a skin disorder of unknown aetiology, most probably being immune mediated.
Features
Lichenoid drug eruptions - causes:
Management
Features
- itchy, papular rash most common on the palms, soles, genitalia and flexor surfaces of arms
- rash often polygonal in shape, 'white-lace' pattern on the surface (Wickham's striae)
- Koebner phenomenon may be seen (new skin lesions appearing at the site of trauma)
- oral involvement in around 50% of patients
- nails: thinning of nail plate, longitudinal ridging
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Lichenoid drug eruptions - causes:
- gold
- quinine
- thiazides
Management
- topical steroids are the mainstay of treatment
- extensive lichen planus may require oral steroids or immunosuppression
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| © Image used on license from DermNet NZ | |
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| © Image used on license from DermNet NZ | |