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Alopecia areata (AA) is a non-scarring, autoimmune, inflammatory, relapsing hair loss affecting the scalp and/or body. In acute-phase AA, CD4+ and CD8+ T cells infiltrated in the juxta-follicular area. In chronic-phase AACD8+ T cells dominated the infiltrate around hair bulbs which contributes to the prolonged state of hair loss. Treatments include mainly corticosteroids, topical irritants, minoxidil, cytotoxic drugs and biologicals. This review highlights mainly the pathomechanism and pathology, classifications and associated diseases with regard to their importance for current and future treatment.
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Zonunsanga (2015) studied this question.
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