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ISRN Dermatology
Volume 2014 (2014), Article ID 953747, 4 pages
Research Article

Hypertrichosis Is Not so Prevalent in Becker's Nevus: Analysis of 47 Cases

1Department of Dermatology, Hazrat-e Rasool University Hospital, Iran University of Medical Sciences, Tehran, Iran
2Skin and Stem Cell Research Center, Tehran University of Medical Science, 4 Kamraniye Street, Maryam Alley, Tehran, Iran
3Iranian Center for Medical Laser, Academic Center for Education, Culture and Research, Tehran, Iran

Received 16 February 2014; Accepted 9 March 2014; Published 30 April 2014

Academic Editors: M. Alaibac and A. Rebora

Copyright © 2014 Abbas Rasi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Becker's nevus is a relatively common cutaneous hamartoma, but is often overlooked or misdiagnosed. This nevus usually begins during the second decade of life as a circumscribed, hyperpigmented patch with irregular outline that gradually enlarges with associated hypertrichosis, developing several years later. The purpose of this study was to determine the prevalence of lesional hypertrichosis associated with Becker's nevus. Methods. 47 patients who had sharply demarcated brown patch with or without coarse hair, presence or enlargement of the lesion at the time of puberty, and compatible Wood's light examination were enrolled. Patients who had axillary freckling, previous skin inflammation, and gray pigmentation of the lesions were excluded. Results. In summary, the mean age of onset was 11.89 (range 0–19). The most commonly involved site was the arm (34%), followed by shoulder (23.4%), chest, face, flank, buttock, and leg. Lesional hypertrichosis was found in only 8 (17%) of the 47 patients. In 29 cases (61.7%) the lesions were in the right side of the body. Conclusion. Hypertrichosis was not so frequent among patients with Becker's nevus. There was a higher preponderance of the lesions on the right side.