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This study highlights the importance of recognizing artifacts in trichoscopy, as certain cosmetic products can mimic signs of early androgenetic alopecia.

In this study, researchers found that the peripilar sign in patients with androgenetic alopecia does not indicate perifollicular infiltrate but is more frequent in individuals with lighter skin types due to contrast with the skin.

This study found that peripilar signs on the scalp are linked to perifollicular lymphocytic infiltrates in early androgenetic alopecia, detectable even in areas with high hair density.

This study reports pseudopili annulati in a dark-haired Chinese girl, identifying the unique appearance and structural characteristics of her hair without finding abnormalities in the cuticle and cortex.

This article discusses the pseudo 'fringe sign' in frontal fibrosing alopecia, highlighting that it is not solely related to traction, and it reports no new clinical results.