Brocq investigated pseudopelade around 1885. The term has been in use for seventy-odd years. Still, now and then, the question is raised as to what is the exact nature of pseudopelade and how it should be discussed in the classroom. Pseudopelade is defined by Laymon and Murphy1 as an insidious, asymptomatic, noninflammatory disease of the scalp, with marked cutaneous atrophy, and is included among the cicatricial alopecias.
Pierini and Borda in 19492 reported seven cases in which they associated pseudopelade with lichen planus, and they believe that pseudopelade is the end-result of lichen planus of the scalp.
In 1951 they reported 11 additional cases,3 in 2 of which lichen planus, located at the edge of the scalp, is described as psoriasiform. In other cases the areas of alopecia are described as finely desquamating and/or showing folliculitis. They quote similar cases as reported by Photinos, Robba, Santori, and
RONCHESE F. Pseudopelade. Arch Dermatol. 1960;82(3):336–343. doi:10.1001/archderm.1960.01580030030003