Original articleDermoscopy of black skin: A cross-sectional study of clinical and dermoscopic features of melanocytic lesions in individuals with type V/VI skin compared to those with type I/II skin
Section snippets
Methods
This is a cross-sectional study with prospective and consecutive data collection in 2 different centers (Federal University of São Paulo and State University of Londrina) that was carried out between October 2010 and March 2013. Data were collected by a single dermoscopy expert. All of the patients provided written informed consent, and the ethics committee of both institutions involved approved the study.
Patient screening took place in dermatologic outpatient clinics, to be representative of
Results
From the 501 volunteers, 480 (95.8%) met the criteria for clinical analysis. In all, 21 volunteers were excluded because of tanned skin or recent sun exposure. Of the 480 participants, 460 (95.83%) had eligible melanocytic nevi, and 11 participants were excluded from the dermoscopic analysis because of the presence of melanocytic lesions only in special anatomic sites (face and acral site); 9 were excluded because they showed no lesions. No patients were excluded because of the poor quality of
Discussion
This study examined the differences in dermoscopic analysis (global, pattern, pigment distribution, and color) between skin types V/VI and I/II. To our knowledge, this is the first study that compares these 2 groups and includes a large number of individuals. Furthermore, we observed differences in the number and anatomic distribution of melanocytic lesions between these 2 groups.
In the study of Zalaudek et al,11 dermoscopic analysis revealed significant differences in the prevalent nevus
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JAAD Game Changers: Dermoscopy of black skin: A cross-sectional study of clinical and dermoscopic features of melanocytic lesions in individuals with type V/VI skin compared to those with type I/II skin
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Funding sources: None.
Conflicts of interest: None declared.