The correct answer is C. Axilla.
This patient may have a variant of lichen planopilaris known as Graham-Little–Piccardi–Lassueur syndrome.
Graham-Little–Piccardi–Lassueur syndrome is characterized by the triad of: (1) non-cicatricial loss of pubic and axillary hairs and disseminated spinous or acuminated follicular papules; (2) typical cutaneous or mucosal lichen planus (LP); and (3) scarring alopecia of the scalp with or without. These features need not be present simultaneously.
1. Bolognia JL, Schaffer JV, Cerroni L, Callen JP. Dermatology Volume 2. Edinburgh Elsevier; 2018.
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