PMC7522401_01
Clinical images of ARPC. Scattered keratotic papules on the trunk, part of the lesions may have umbilical recesses, and the shape is crater-shaped (White arrow).
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Some skin lesions had a concave umbilical shape and a crater shape (Figure 1).
Clinical images of ARPC. (A) Koebner Phenomenon due to scratching can be seen at the elbow, and the lesions are fused into a piece (Yellow arrow). Typical rash for crater-shaped (White arrow); (B) crater-shaped rash of waist; (C) Koebner Phenomenon of lower limb.
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Some of the scratched lesions merged into large ones (Figure 2).
Histopathology of ARPC. (A) collagen fibers that vertically penetrated the epidermis (White arrow, HEx40); (B) HEx100; (C) the collagen fibers of the epidermis are stained light blue (Masson stainx400).
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The defects contained a large number of keratinized plugs (Figure 3A, HEx40). Locally visible collagen fibers that vertically penetrated the epidermis were characteristic, with infiltration of inflammatory cells around them (Figure 3B, HEx100), Masson staining showed collagen fibers stained in the superficial dermis and blue in the epidermis (Figure 3C, Masson stainx400).
Clinical images before and after ARPC treatment. (A) Scattered rashes all over the body before treatment; (B) most of the lesions subsided after 6 weeks of treatment.
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Most of the lesions subsided after 6 weeks of treatment (Figure 4).