Table 1.

Primary Scarring (Permanent) Alopecias (according to the Proposed Working Classification of Primary Cicatricial Alopecia by the North American Hair Research Society; 1999)3

Lymphocyte-associated primary scarring alopecias

Chronic cutaneous lupus erythematosus

Lichen planopilaris

Classic lichen planopilaris

Frontal fibrosing alopecia

Graham Little syndrome

Classic pseudopelade (Brocq)

Central centrifugal cicatricial alopecia

Alopecia mucinosa

Keratosis follicularis spinulosa decalvans

Neutrophil-associated primary scarring alopecias

Folliculitis decalvans

Dissecting cellulitis/folliculitis (perifolliculitis abscedens et suffodiens)

Mixed inflammatory primary scarring alopecias

Folliculitis (acne) keloidalis

Folliculitis (acne) necrotica

Erosive pustular dermatosis

Nonspecific primary scarring alopecias*

^*Non-specific scarring primary alopecia is defined as an idiopathic scarring alopecia with inconclusive clinical and histopathologic findings and may include the end stage of a variety of inflammatory primary scarring alopecias, such as lichen planopilaris and folliculitis decalvans.