Distribution of congenital melanocytic naevi and congenital naevus-like naevi in a survey of 3406 Italian schoolchildren

S. Gallus, L. Naldi, Maurizio Leardini, Marialisa Feliciangeli, Danilo Assalve, Luca Stingeni, Ignazio Stanganelli, Serena Magi, Francesco Cusano, Giovanni Sarracco, Anna Di Landro, Giovanni Lo Scocco, Vito Di Lernia, Giampaolo Tessari, Gianfranco Fenizi, Andrea Altobella, Paolo Carli, Paolo Nardini, Vincenzo De Giorgi, Enrico PezzarossaRossella Morelli, Antonella Frassetto, Andreina Cellini, Oriana Simonetti, Annamaria Offidani, Annarosa Virgili, Maria Rosaria Zampino, Pietroandrea Villano, Anna Ausilia, Sonia Ferraiolo, Concetta Flaminio, Francesco Tripodi-Cutrì, Raffaele Filotico, Maria Ester Lassandro

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Scanty information is available on the prevalence of congenital melanocytic naevi (CMN) and congenital naevus-like naevi (CNLN), particularly the small ones. Objectives: To estimate the prevalence of CMN/CNLN in Italian schoolchildren, and to assess variations according to potential risk factors for melanoma. Methods: We conducted a survey in 13 Italian areas on 3406 schoolchildren aged 12-17 years. Children were examined by dermatologists who assessed pigmentary traits and made a count of small (6-15 mm in diameter) and medium/large (> 15 mm) CMN/CNLN on 19 anatomical areas. Results: Overall, 592 children (17.4%) had one or more CMN/CNLN. Prevalence of small CMN/CNLN was 16.1%, and that of medium/large CMN/CNLN was 1.8%. There was no difference between age groups and sexes. CMN/CNLN were more frequent in children with a higher number of common melanocytic naevi (multivariate odds ratio, OR = 7.1 for the highest vs. the lowest quartile), consistent in small (OR = 7.2) and medium/large CMN/CNLN (OR = 6.0). Family history of malignant melanoma (OR = 1.4) and personal history of diabetes (OR = 4.4) appeared to be directly, and sun exposure inversely associated with CMN/CNLN. No relation was evident between CMN/CNLN and pigmentary traits, anthropometric characteristics, dietary habits, freckles, sunburns, sunscreen use or history of selected diseases. Conclusions: The association with family history of melanoma, the strong association with acquired melanocytic naevi, and the lack of association with pigmentary traits and sunburns suggest that CMN/CNLN may act as an independent risk marker for subjects at increased risk for cutaneous melanoma later in life.

Original languageEnglish
Pages (from-to)433-438
Number of pages6
JournalBritish Journal of Dermatology
Volume159
Issue number2
DOIs
Publication statusPublished - Aug 2008

Keywords

  • Children
  • Congenital naevus
  • Congenital naevus-like naevi
  • Italy
  • Survey

ASJC Scopus subject areas

  • Dermatology

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