Lichen planopilaris presenting as truncal alopecia: a case presentation and review of the literature.

Lichen planopilaris is an inflammatory condition of unknown etiology, characterized by violaceous folliculocentric papules and hair loss. Some clinicians consider lichen planopilaris to be a variant of lichen planus, but others believe it to be a separate disease entity. Many treatment modalities have been utilized, with varying degrees of success. We describe the case of a 63-year-old man who presented with widespread alopecia of the trunk and extremities and was subsequently diagnosed with lichen planopilaris.