Skin Appendage Disord
March 2023
Introduction: Although Hutchinson's sign can appear associated with benign conditions, dermoscopic findings of non-melanoma eponychium pigmentation have not yet been described in the literature. We report for the first time to our knowledge the dermoscopic findings of an acral nevus located in the proximal nail fold as well as its clinical-dermoscopic-histologic correlation.
Case Report: A twenty-year-old patient presented with a homogeneous longitudinal melanonychia on the left-hand thumb, with benign dermoscopic pattern, and an irregular, 6-mm, dark-brown hyperpigmented macule on the adjacent eponychium (Hutchinson's sign).
Lichen sclerosus (LS) is a rare and chronic autoimmune disease, and extragenital LS is particularly challenging to diagnose in children. Histopathology is the gold standard for diagnosis. Dermoscopy is a useful tool when follicular plugs (FP) are observed, though FP are sometimes hard to recognize.
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