A 10 year old child has violaceous papule and pterygium of Nails, the diagnosis is :: (A) Psoriasis, (B) Lichen Planus, (C) Pemphigus, (D) Pemphigoid
Answer is B. Ans. is 'b' Lichen Planus Violaceous papules and pterygium clinches the diagnosis of lichen planusImp, point about lichen planusPruritic Papular disorder involvingFlexural surface*Mucous membraneGenitaliaClinical FeaturesAge group 30-60 yrsLesions arePolygonal*Plain topped*Papules*Purple*The lesions are Symmetrical and usually effectForearm and wristsLower legs & thighGenitaliaPalms and solesMucosal involvement (especially the buccal mucosa) occurs in 2/3 cases.Other characteristic features :Wickham's Striae* - Delicate white lines on surface of lesionKoehler phenomenon * Nail Involvement - Occurs in 10% cases {pterygium*, Anychia) Scalp lesions - Scarring Alopecia* occurs.