Abstract
Lichen planus follicularis tumidus (OPFT) is a very rare type of lichen planus described in 1977 by Belaïch et al who reported three cases of retroauricular LPFT accompanied by conventional lichen planus at other sites. To date, 17 cases of LPFT were described in the literature.
LPFT is most common in middle-aged women and clinically manifests as reddish brown or violaceous plaques associated with yellowich white cysts and comedone-like lesions, asymptomatic or itchy. The most frequent localization is the retroauricular area.
Other sites include the neck, cheeks, chin, ears, scalp, frontotemporal area, and lumbosacral zone. Some cases have typical lichen planus lesions on the skin and mucous membrane, but in most patients plaques with milia atop are the only clinical feature.
Histopathologically, LPFT is characterized by a combination of LPFT on the right side of the face (involving frontotemporal area, cheek, preauricular area, and chin) and cicatricial alopecia of the scalp without any other lesion of lichen planus elsewhere on the body or mucous membranes. The histopatological findings were typical of this condition.