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  Indian J Med Microbiol
 

Figure 2: (a) A hyperpigmented plaque, approximately 1 × 1.5 cm in size, with mild scaling over the occipital area. The hair on the lesion is broken. (b) Dermoscopic examination showing broom hair fibers (Red Arrow) and mild perifollicular scaling (10×, Heine NC1® polarized light). (c) Histopathological eamination of skin biopsy showing the outer root sheath forming jagged acanthotic projections, which together with the hair canal in the middle resemble a gear wheel (10×, horizontal sections at the level of the infundibulum and isthmus. (d) The hamburger sign (40×)

Figure 2: (a) A hyperpigmented plaque, approximately 1 × 1.5 cm in size, with mild scaling over the occipital area. The hair on the lesion is broken. (b) Dermoscopic examination showing broom hair fibers (Red Arrow) and mild perifollicular scaling (10×, Heine NC1® polarized light). (c) Histopathological eamination of skin biopsy showing the outer root sheath forming jagged acanthotic projections, which together with the hair canal in the middle resemble a gear wheel (10×, horizontal sections at the level of the infundibulum and isthmus. (d) The hamburger sign (40×)