Table 2.

Histopathologic characteristics of primary scarring alopecias

	@ LPP	* CCLE	# PB	$ FD	## DF
Hyperqueratosis extrafollicular	−	+	−	+/−	+/−
Horn plug	+	+	−	+/−	+/−
Epidermal atrophy	−	+	−	+/−	+/−
Vacuolar degeneration of epidermal basal cells	−	+	−	+/−	+/−
Neutrophilic folliculitis	−	−	−	+	+
Lichenoid Perifolliculitis	+	+	−	−	−
Dermal lymphocytic periecrine infiltrate	−	+	−	−	−
Fibrous tract replacing follicle	+ colloid bodies within	+	+	+	+
Extrafollicular extensive dermo-hipodermal fibrosis	−	+/−	−	+ dermal	+ dermo-hipodermal
Sinus tract	−	−	−	−	+
Preserved perifollicular elastic sheet	−	−	+	−	−
Thickened basement membrane (epidermal or follicular)	−	+	−	−	−

^@Lichen Planus Pilaris (LPP);

^*Chronic Cutaneous Lupus (CCLE);

^# Pseudopelade of Brocq (PB);

^$ Folliculitis decalvans (FD);

^## Dissecting folliculitis (DF)