Figure 10-4
Alopecia areata. Note black, flecklike "exclamation mark" hairs at the periphery.

Figure 10-5
Alopecia areata. This man's alopecia areata is limited to his beard.

Figure 10-6
Alopecia areata (alopecia universalis). This patient has lost most of her eyebrows, which she colors in with an eyebrow pencil. She also lacks eyelashes, pubic hair, axillary hair, and hair on her extremities.

Figure 10-7
Alopecia areata (regrowing hair). In this patient with alopecia areata, clusters of hair regrew after intralesional triamcinolone acetonide injections. Some of the regrown hairs are white (vitiliginous).

Figure 10-8
Trichotillomania. This condition is seen most often in young girls. Hairs tend to be broken at different lengths. The areas of alopecia are not completely devoid of hair.

Figure 10-11
Traction alopecia. This woman's alopecia is the result of the use of tight curlers: Note the symmetric loss of hair in a frontotemporal distribution. Also note the "relaxed" curl that was chemically straightened.

Figure 10-12
Traction alopecia. Note the fringe of residual hairs at the distal margin of alopecia. These hairs were too short to be "grabbed" by the hair curlers.