Lichen Planopilaris

Lichenoid folliculitis: A unifying concept

“…In 1928, McCafferty discussed a patient purported to have GLPL, ultimately concluding that the case was a severe form of ulerythema ophryogenes (UO), as originally described by Taenzer in 1889 . In 1942, Sachs reviewed McCafferty's case. He determined that it was more fitting as GLPL and proposed that the terms “lichen spinulosus et folliculitis decalvans” and “lichen planus et acuminatus atrophicans” were actually LPP.…”

“…The reported histologic descriptions 2,7,8,11,13,25,26,32,34,35,38,42‐44 of the KPA entities are often vague and nonspecific, but in some cases clearly represent LF (Figures and ). Descriptions are all based on individual case reports or small case series.…”

“…Shortly thereafter (1915), Graham Little reported similar findings in one of Lassueur's patients. Today, this entity is known as GLPL and has also been labeled as “lichen spinulosus et folliculitis decalvans,” “folliculitis decalvans et atrophicans” or “lichen planus et acuminatus atrophicans,” among other terms 42,48‐51 . In 1928, McCafferty discussed a patient purported to have GLPL, ultimately concluding that the case was a severe form of ulerythema ophryogenes (UO), as originally described by Taenzer in 1889 .…”

“…The reported histologic descriptions 2,7,8,11,13,25,26,32,34,35,38,[42][43][44] of the KPA entities are often vague and nonspecific, but in some cases clearly represent LF (Figures 1 and 2 Images from at least some reports show changes of an interface dermatitis with vacuolar alteration of the basilar layer. 8,34,38,44 The lack of histologic specificity may be due to the stage of disease biopsied, reliance on vertical sectioning, or sampling error.…”