Dermoscopy patterns of halo nevi

Kolm, Isabel, Di Stefani, Alessandro, Hofmann-Wellenhof, Rainer, Fink-Puches, Regina, Wolf, Ingrid H., Richtig, Erika, Smolle, Josef, Kerl, Helmut, Soyer, H. Peter and Zalaudek, Iris (2006) Dermoscopy patterns of halo nevi. Archives of Dermatology, 142 12: 1627-1632. doi:10.1001/archderm.142.12.1627

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Author Kolm, Isabel
Di Stefani, Alessandro
Hofmann-Wellenhof, Rainer
Fink-Puches, Regina
Wolf, Ingrid H.
Richtig, Erika
Smolle, Josef
Kerl, Helmut
Soyer, H. Peter
Zalaudek, Iris
Title Dermoscopy patterns of halo nevi
Journal name Archives of Dermatology   Check publisher's open access policy
ISSN 0003-987X
Publication date 2006-12
Year available 2006
Sub-type Article (original research)
DOI 10.1001/archderm.142.12.1627
Open Access Status File (Publisher version)
Volume 142
Issue 12
Start page 1627
End page 1632
Total pages 6
Place of publication Chicago, U.S.A.
Publisher American Medical Association
Language eng
Subject 110304 Dermatology
Formatted abstract
Background: Halo nevi (HN) are benign melanocytic nevi surrounded by a depigmented area (halo). This study aims to evaluate the dermoscopic features of HN and their changes during digital dermoscopic follow-up and to investigate the frequency of the halo phenomenon in a series of melanomas.
Observations: In a retrospective study, digital dermoscopic images of HN from patients who attended the Pigmented Skin Lesions Clinic of the Department of Dermatology, Medical University of Graz, between October 1, 1997, and March 31, 2004, were reviewed and classified by dermoscopic morphologic criteria. For HN that were followed up with digital dermoscopy, the percentages of changes in the size of the nevus and halo components were calculated. In addition, digital dermoscopic images of histopathologically confirmed melanomas obtained from the same database were reviewed for the presence of an encircling halolike depigmentation. We classified 138 HN in 87 patients (mean age, 22.4 years). The most common dermoscopic structures were the globular and/or homogeneous patterns in more than 80% of HN. Follow-up of 33 HN revealed considerable size reduction of the nevus component, but this was not associated with significant structural changes. Of a total of 475 melanomas, only 2 revealed an encircling halo, but both displayed clear-cut melanoma-specific patterns according to dermoscopy.
Conclusions: Halo nevi exhibit the characteristic dermoscopic features of benign melanocytic nevi, represented by globular and/or homogeneous patterns that are typically observed in children and young adults. Halo nevi reveal considerable changes of area over time during digital dermoscopic follow-up, albeit their structural patterns remain unchanged. For this reason and because melanoma with halolike depigmentation, despite being rare, additionally exhibits melanoma-specific dermoscopic criteria, the role of digital dermoscopic follow-up in the diagnosis of HN is insignificant.
©2006 American Medical Association. All rights reserved.

Keyword Halo nevi (HN)
Benign melanocytic nevi
Digital dermoscopy
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Medicine Publications
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Created: Wed, 25 Mar 2009, 09:52:49 EST by Ms Karen Naughton on behalf of School of Medicine