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

作者：Tuma Bruna^*; Yamada Sergio; Atallah Alvaro Nagib; Araujo Fernanda Mendes; Hirata Sergio Henrique

来源：Journal of the American Academy of Dermatology, 2015, 73(1): 114-119.

DOI：10.1016/j.jaad.2015.03.043

• acquired melanocytic nevi
• African descent
• black people
• dermoscopy
• ethnic group
• melanoma
• skin surface microscopy

Background: The identification of "normal'' dermoscopic patterns of acquired melanocytic nevi provides better diagnostic accuracy for melanoma in people with black skin.
Objective: We sought to describe melanocytic lesions (numbers and anatomic distributions) in skin types V and VI compared with skin types I and II, according to the Fitzpatrick classification. We sought to identify differences in dermoscopic findings in acquired melanocytic nevi (global pattern, pigment and color distribution) between the groups.
Methods: We conducted cross-sectional, prospective, and consecutive data collection in 2 dermatologic outpatient clinics, between October 8, 2010, and March 20, 2013. From the 501 volunteers, 480 participants fulfilled the eligibility criteria. A total of 460 acquired melanocytic nevi were selected for dermoscopic analysis.
Results: Individuals with skin type V/VI had fewer melanocytic lesions than those with skin type I/II (15.08 vs 7.90; P = .032), and the anatomic distribution in the first group was predominantly on the face and acral sites (P < .001). The acquired melanocytic nevi in the skin type V/VI group were associated with the reticular pattern (P < .0001), with a tendency toward central hyperpigmentation (P = .0025).
Limitations: The choice of a single representative nevus per patient is a limitation.
Conclusions: Acquired melanocytic nevi in individuals with skin type V/VI have a distinct dermoscopic pattern from those with skin type I/II.

• 出版日期2015-7