PMC8627239_01
Dermatological examination: (A) multiple brown scales with adherent centers and detached, outward-turning edges, with multiple, overlying, small black dots on the extensor areas of both lower extremities; (B) close-up view showing abnormal hairs on the areas of skin abnormality.
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Physical examination revealed multiple brown scales with adherent centers and detached, outward-turning edges, with multiple, overlying, small black dots on the extensor areas of both lower extremities, sparing the flexural areas, as well as abnormal hairs on the areas of skin abnormality (Figure 1).
Dermoscopic examination: (A) multiple dark hairs with a perfectly circular arrangement, located under a thin layer of skin (original magnification x20); (B) close-up view of circle hairs (original magnification x80).
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Dermoscopic examination revealed multiple dark hairs with a perfectly circular arrangement, located under a thin layer of skin (Figure 2).
Histopathological examination: laminated hyperkeratosis with hypogranulosis and a dilated hair follicle.
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The specimen also contained a dilated hair follicle (Figure 3).