J Cutan Pathol 2017 Mar 26. Epub 2017 Mar 26.
Department of Dermatology, Uniformed Services University of the Health Sciences, Los Angeles, California and Bethesda, Maryland.
Skin diseases presenting with keratotic papules, atrophy, cicatricial alopecia, and/or "lichenoid" histopathologic changes have been described under at least 30 names. This family of diseases contains two subgroups, largely based on clinical features: keratosis pilaris atrophicans (KPA; including keratosis pilaris atrophicans faciei/ulerythema ophryogenes, atrophoderma vermiculata , and keratosis follicularis spinulosa decalvans); and the lichen planopilaris (LPP) subgroup (including LPP, frontal fibrosing alopecia, Graham-Little-Piccardi-Lassueur Syndrome, and fibrosing alopecia in a pattern distribution). An interface dermatitis with lichenoid inflammation is characteristic of the LPP group of disorders, but the literature provides scant information about the histopathology of the KPA group. Read More