Linear Lichen Planus: Continuum From Skin to Mucosa

Lichen planus (LP) is a chronic inflammatory disorder that most commonly affects middle-aged individuals. LP involves the skin and/or mucous membranes, including oral, vulvovaginal, esophageal, laryngeal, and conjunctival mucosa. Linear LP, a rare distinct variant of LP, is characterised by pruritic eruption of lichenoid and violaceous papules in a linear distribution. We report an unusual presentation of linear LP in a 14-year-old child that extended from the left anterior nares to upper lip and into the oral mucosa up to the upper gum margin.