PMC9084220_01
Clinical features. (A and B) Brownish linear and whorled hyperpigmentation along Blaschko's lines on the legs in patient 1. (C and D) Verrucous and linear hyperpigmented lesions and tracing Blaschko's lines on the trunk and legs in patient 2.
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Blaschko's lines on the trunk and extremities (Figure 1A and B). Besides she had sparse hair and many decayed teeth. Then the skin lesions developed verrucous and linear hyperpigmented lesions tracing Blaschko's lines on the trunk and legs (Figure 1C and D).
Histological image of patient 1. The net-like keratinized epidermis, epidermal hyperplasia, marked melanin incontinence with many melanophages in the dermis, and infiltration of a few lymphocytes around blood vessels (HE, x200).
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Histology of the lesion on the leg revealed the typical changes of IP in patient 1 (Figure 2).