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Yellow dots are the most useful dermoscopic criterion in the clinical diagnosis of alopecia areata and correspond histopathologically with dilated follicular infundibula. They are found in about 95% of alopecia areata cases and help to differentiate alopecia areata from trichotillomania, telogen effluvium and from scarring alopecias. Histopathology of alopecia areata differs with disease activity...
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