Lichen planopilaris with Koebner phenomenon

Lichen planopilaris (LLP) is a rare, progressive disease of the scalp and is an important cause of scarring alopecia.1 LPP is classified clinically into 3 types: classic LPP, frontal fibrosing alopecia, and Graham-Little-Piccardi-Lassueur syndrome.2,3 In classic LPP, patients commonly present with single or multiple patches of alopecia in the vertex of the scalp.4 The exact pathogenesis of LPP remains unclear.5,6 Here we describe a case involving one of the youngest reported adult subjects in which the trigger for LPP is unique and was not previously reported.