Lichen planus /lichen sclerosis

Question 1

Lichen planus

Answer 1

unknown aetiology, most probably being immune-mediated.

Question 2

features of lichen planus ?

Answer 2

on palms and
skin lesions appearing at the site of trauma)

purple,
pruritic,
papular,
polygonal rash on flexor surfaces

polygonal rash - white-lines’ pattern on the surface (Wickham’s striae)

Question 3

other involvement of lichen planus ?

Answer 3

oral involvement in around 50% of patients: typically a white-lace pattern on the buccal mucosa

Question 4

Lichenoid drug eruptions - causes

Answer 4

gold
quinine
thiazides

Question 5

Management of Lichenoid / lichen planus.

Answer 5

topical steroids

benzydamine mouthwash or spray is recommended for oral lichen planus

lichen planus may require oral steroids or immunosuppression

Question 6

lichen planus has?

Answer 6

Koebner phenomenon may be seen (new skin lesions appearing at the site of trauma)

Question 7

clinical features of lichen sclerosis

Answer 7

excoriated depigmented patch
itchy white spots typically seen on the vulva of elderly women

Exam questions will often involve an elderly female and the lesion appearing on the vulva.

important to note that it may happen in other areas, such as the thighs and anal region. In males, it usually affects the glans penis, in which case it is called balanitis xerotica obliterans.