Alopecia areata is a common form of nonscarring alopecia. It affects males and females equally and has no racial predilection. It usually affects the scalp, but any hair-bearing area can be involved. It presents as patchy hair loss, loss of hair on the entire scalp (alopecia totalis), or the whole body (alopecia universalis). The histopathology varies according to the disease stage, but usually a perifollicular lymphocytic infiltrate is seen. The course of the disease and response to treatment are unpredictable. Various therapeutic modalities are used including topical, intralesional, and systemic ...
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