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This study found that, among 100 patients with alopecia areata, the most prevalent subtype was patchy alopecia areata, with characteristic trichoscopic features including black dots, yellow dots, and empty hair follicles.

In this study, oral acitretin therapy for psoriasis was associated with excess granulation tissue in the nail sulcus and noncicatricial universal alopecia.

In this study, transverse sectioning of scalp biopsy samples showed higher diagnostic accuracy than vertical sectioning for noncicatricial alopecia, although both techniques are important for accurate diagnosis.

This review focuses on the medical treatment of common nonscarring alopecias, including androgenetic alopecia, alopecia areata, and telogen effluvium, and reports no new clinical results.

This review discusses various non-invasive methods for diagnosing alopecia areata, highlighting that trichoscopy signs like short vellus hairs and yellow dots are sensitive indicators of the condition, while advanced imaging techniques provide valuable information on hair follicle status and scalp inflammation.