Lichen Planopilaris in the Setting of Hair Sunscreen Spray

Lichen planopilaris (LPP) is a scarring alopecia seen classically in older Caucasian women. Frontal fibrosing alopecia (FFA) is a distinct disease that shares the histologic and trichoscopic features of LPP but differs in its clinical presentation in that it involves the frontal scalp and occasionally the eyelashes and eyebrows of older Caucasian women. Several recent studies have described a link between FFA and the use of sunscreen. Here we report a case of LPP arising in the part line of the scalp of a woman with a history of long-term daily application of spray-on sunscreen to the hair part line.