Alopecia areata - Hair and Scalp
The course of alopecia areata is unpredictable, with wide variation in duration and extent of disease occurring from patient to patient. In most patients, hair will eventually spontaneously regrow, although recurrences are common. The condition is treatable but cannot be cured.
In one retrospective study of 321 patients, temporal area involvement was independently associated with worse prognosis (in addition to extent of hair loss).
L63.9 – Alopecia areata, unspecified
68225006 – Alopecia areata
Differential Diagnosis & Pitfalls
- Trichotillomania, from the twisting and pulling of hair, may mimic alopecia areata. Hairs are broken off at varying lengths.
- Telogen effluvium from nutritional, hormonal, and drug etiologies can lead to large clumps of hair loss in a similar fashion to alopecia areata. The loss is diffuse, not localized.
- Tinea capitis has hair loss accompanied by scale and inflammation.
- Secondary syphilis can result in diffuse patchy alopecia.
- Androgenetic alopecia – male or female pattern
Drug Reaction Data