Lichen planus

Question 1

Common sites for lichen planus?

Answer 1

Forearms, wrists, legs
Can be in oral mucosa - so check here

Question 2

Describe lichen planus lesions

Answer 2

Violaceous (lilac) flat topped papules or hyperpigmented papules
Symmetrical distribution
In darker skin = skin has purplish tinge
In mouth = white lace pattern on buccal mucosa

Question 3

Associated features of lichen planus?

Answer 3

Nail changes (thinning)
Hair loss
Mouth - painless lacy white streaks (white lace pattern - Wickham striae)

Question 4

Investigations for possible lichen planus?

Answer 4

Skin biopsy

Question 5

Management for lichen planus?

Answer 5

Corticosteriods - topical
Antihistamines

Question 6

Drug causes of lichen planus?

Answer 6

Quinines
Thiazides