Lichen Planus

Question 1

What is the cause of lichen planus?

Answer 1

Uknown but thought to be immune mediated.

Question 2

Describe the features of lichen planus.

Answer 2

• Itchy papular rash most commonly on palms, soles, genitals 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 lichen planus in around 50% of patients
• Nails: thinning of nail plate, longitudinal ridging

Question 3

What are some causes of lichenoid drug eruption?

Answer 3

• Gold
• Quinine
• Thiazides

Question 4

What is the management of lichen planus?

Answer 4

• Topical steroids
• May require oral steroids or immunosuppression if extensive.

Question 5

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Question 8

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Question 9

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Question 10

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Question 11

What is the easy way to remember Lichen Planus & the difference between Lichen Planus and Lichen Sclerosis?

Answer 11

Lichen

Planus: purple, pruritic, papular, polygonal rash on flexor surfaces. Wickham’s striae over surface. Oral involvement common

Sclerosus: itchy white spots typically seen on the vulva of elderly women