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J Am Acad Dermatol. 2015 Jul;73(1):114-9. doi: 10.1016/j.jaad.2015.03.043. Epub 2015 May 13.

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.

Author information

1
Department of Dermatology, Federal University of São Paulo, São Paulo, Brazil; Department of Dermatology, State University of Londrina, Londrina, Brazil. Electronic address: brutuma@yahoo.com.br.
2
Department of Dermatology, State University of Londrina, Londrina, Brazil.
3
Department of Emergency Medicine and Evidence-Based Medicine, Federal University of São Paulo, São Paulo, Brazil.
4
Department of Dermatology, Federal University of São Paulo, São Paulo, Brazil.

Abstract

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.

KEYWORDS:

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

PMID:
25982540
DOI:
10.1016/j.jaad.2015.03.043
[Indexed for MEDLINE]

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