Lichen planopilaris, also called lichen ruber follicularis, evokes perifollicular erythema and sometimes hyperkeratotic follicular papules. A violaceous discoloration of the scalp may be observed.

Neutrophil-associated scarring alopecias include folliculitis decalvans, perifolliculitis capitis abscendens et suffodiens (of Hoffman), and acne keloidalis nuchae. Although the exact etiology is ...