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Case of amyloidosis cutis dyschromica with dermoscopy

dysplastic nevus and melanoma-prone family in Asia is less than that reported previously in Western countries. Non-invasive and easy to reconstruct dermoscopy is useful for determining whether or not skin biopsy or excision of multiple lesions needs to be performed and is effective even for patients requiring long-term follow up to determine the changes of lesions. Stolz et al. retrospectively examined 157 melanocytic lesions diagnosed histopathologically. In comparison of the diagnosis by TDS with histological diagnosis, the diagnostic accuracy was found to be 94%, specificity 90.3% and sensitivity 100%, showing high diagnostic value of the ABCD rule. In this study, there were no specific dermoscopic findings of dysplastic nevus in Koreans compared with previous studies. In addition, comparing the diagnosis by TDS with histopathological diagnosis, it was found that only 9.1% (one lesion) was misdiagnosed as MM. It suggests that TDS is useful for excluding MM with multiple atypical lesions, but it cannot completely distinguish dysplastic nevus from MM for all atypical lesions.