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Correspondence |

Lonely Hair Sign: Not Specific for Frontal Fibrosing Alopecia

Francisco M. Camacho, MD
Arch Dermatol. 2012;148(10):1208-1209. doi:10.1001/archdermatol.2012.1736.
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While lonely hairs growing anterior to the frontoparietal hairline and in the preauricular region are markers of frontal fibrosing alopecia,1 they also are present with any type of scarring alopecia. Isolated hairs are present at the edges of disease progression and in the center of the patches of scarring alopecia with lymphocytic infiltrate as in lupus, follicular keratosis spinulosa decalvans, central centrifugal alopecia and alopecia mucinous, and lichen planus pilaris (Figure 1).

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Figure 1. Lonely hair in the center of a plaque of cicatricial alopecia in lichen planus.

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Figure 2. Tufts of hair in the periphery of a plaque of cicatricial alopecia by neutrophilic infiltrate as folliculitis decalvans.

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Correspondence

October 1, 2012
Antonella Tosti, MD
Arch Dermatol. 2012;148(10):1208-1209. doi:10.1001/archdermatol.2012.1873.
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