Zigzag longitudinal melanonychia: a peculiar dermoscopic pattern.
Journal
Journal of the European Academy of Dermatology and Venereology : JEADV
ISSN: 1468-3083
Titre abrégé: J Eur Acad Dermatol Venereol
Pays: England
ID NLM: 9216037
Informations de publication
Date de publication:
Aug 2020
Aug 2020
Historique:
received:
10
12
2019
accepted:
27
03
2020
pubmed:
23
4
2020
medline:
15
5
2021
entrez:
23
4
2020
Statut:
ppublish
Résumé
Longitudinal melanonychia (LM) can present a diagnostic challenge and dermoscopy is of utmost importance for its evaluation and differential diagnosis of LM. This report aimed to describe an unusual dermoscopic pattern in a group of patients that presented with LM. The clinical course and features of five LM patients that presented with an unusual 'zigzag' dermoscopic pattern were analyzed retrospectively. In all, four of the five patients were children (age range: 10-13years). In all five patients, the thumb nail was affected. A nail matrix biopsy was available for only one patient and was reported as lentigo. In two (one child and one adult) out of the five patients, spontaneous total regression of the LM was observed. The peculiar 'zigzag' dermoscopic pattern of LM described herein seems to occur primarily in children. Although this pattern is a benign in nature, it is not clear if it is related to trauma. Further investigation is warranted to clarify the association between the histopathological findings and the zigzag pattern observed via dermoscopy.
Sections du résumé
BACKGROUND
BACKGROUND
Longitudinal melanonychia (LM) can present a diagnostic challenge and dermoscopy is of utmost importance for its evaluation and differential diagnosis of LM.
OBJECTIVE
OBJECTIVE
This report aimed to describe an unusual dermoscopic pattern in a group of patients that presented with LM.
METHODS
METHODS
The clinical course and features of five LM patients that presented with an unusual 'zigzag' dermoscopic pattern were analyzed retrospectively.
RESULTS
RESULTS
In all, four of the five patients were children (age range: 10-13years). In all five patients, the thumb nail was affected. A nail matrix biopsy was available for only one patient and was reported as lentigo. In two (one child and one adult) out of the five patients, spontaneous total regression of the LM was observed.
CONCLUSIONS
CONCLUSIONS
The peculiar 'zigzag' dermoscopic pattern of LM described herein seems to occur primarily in children. Although this pattern is a benign in nature, it is not clear if it is related to trauma. Further investigation is warranted to clarify the association between the histopathological findings and the zigzag pattern observed via dermoscopy.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1855-1858Informations de copyright
© 2020 European Academy of Dermatology and Venereology.
Références
Leung AKC, Lam JM, Leong KF, Sergi CM. Melanonychia striata: clarifying behind the Black Curtain. A review on clinical evaluation and management of the 21st century. Int J Dermatol 2019; 58: 1239-1245.
Koga H, Saida T, Uhara H. Key point in dermoscopic differentiation between early nail apparatus melanoma and benign longitudinal melanonychia. J Dermatol 2011; 38: 45-52.
Benati E, Ribero S, Longo C et al. Clinical and dermoscopic clues to differentiate pigmented nail bands: an International Dermoscopy Society study. J Eur Acad Dermatol Venereol 2017; 31: 732-736.
Cooper C, Arva NC, Lee C et al. A clinical, histopathologic, and outcome study of melanonychia striata in childhood. J Am Acad Dermatol 2015; 72: 773-779.
Tanaka M, Kimoto M, Saida T. Acral nevus. In: Soyer HP, Argenziano G, Hofmann-Wellenhof R, Johr RH, eds. Color Atlas of Melanocytic Lesions of the Skin, Springer, Heildelberg, 2007: 66-74.