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. 2022 Jun 27;15:1133–1147. doi: 10.2147/CCID.S369346

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© 2022 Umar et al.

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Hematoxylin and eosin stain (×10 magnification) of the scalp of patient 13 (African descent) showing normal orthokeratosis in the occipital area (A) compared with compact orthokeratosis of a thicker epidermis in the parietal scalp (B).