Abstract
Alopecia areata (AA) is a T-cell mediated autoimmune hair loss condition with an estimated lifetime risk of 1.7%. It is characterized clinically by sudden-onset non-inflammatory hair loss that may occur at any site. The disease course is unpredictable with many patients experiencing spontaneous re-growth along with episodes of further loss. Unfortunately, around a fifth of patients presenting with patchy alopecia will progress to complete scalp (alopecia totalis (AT)) or scalp & body (alopecia universalis (AU)) hair loss from which spontaneous regrowth is rare (<10%). The adverse psychological consequences of AA include high rates of anxiety and depression.
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