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- Title
Childhood longitudinal melanonychia: case series from Poland.
- Authors
Sobjanek, Michał; Sławińska, Martyna; Romaszkiewicz, Alicja; Biernat, Wojciech; Pęksa, Rafał; Nowicki, Roman J.
- Abstract
Introduction: Longitudinal melanonychia (LM) is characterized by a tan, brown or black longitudinal streak within nail plate caused by the presence of melanin. LM is relatively common in dark-skinned population, infrequent in Caucasian population, and rare in children. Aim: We report epidemiological, clinicopathological and dermoscopic analysis of 8 cases of childhood LM from Poland, which is the largest series in the Central and Eastern European population. Material and methods: Three hundred and forty-eight patients presenting with various nail pigmentation (in 2010-2016) were analysed. 72 cases of LM have been identified, including 8 cases of childhood LM (< 16 years of age), which were included in further analysis. Results: Seven patients were boys and one girl, with mean age of 9 years (range: 6-13). More than a half (n = 5) presented skin phototype II. The most common location of melanonychia was the first left fingernail. Dermoscopy revealed heterogeneity of longitudinal lines colour in 5 cases. The irregularity of longitudinal line thickness in 5 cases and irregularity of parallelism in 5 cases was observed. Histopathological evaluation was performed in 4 patients, in 3 cases it revealed the presence of nail matrix nevus, in one case the presence of melanocytic proliferation of the lentiginous pattern along the dermoepidermal junction. Conclusions: Despite the fact that melanoma was not recognised in any case, such a possibility should always be considered as the cause of LM, even in the paediatric population. Dermoscopy seems to be useful in patient follow-up and management.
- Subjects
MELANINS; NAIL diseases; HISTOPATHOLOGY; MELANOMA; FINGERNAILS
- Publication
Advances in Dermatology & Allergology / Postępy Dermatologii i Alergologii, 2020, Vol 37, Issue 2, p195
- ISSN
1642-395X
- Publication type
Article
- DOI
10.5114/ada.2019.87706