title: Nail Psoriasis in Children: Common or Uncommon? Results from a 10-Year Double-Center Study.
abstract: OBJECTIVE
  Our aim was to perform an extensive search of the literature on the prevalence of nail psoriasis in the pediatric population and to estimate it on our own database.
  
  
  METHODS
  Searching the most important databases yielded results of 16 papers published in a 40-year period which reported the prevalence of nail psoriasis in children. Furthermore, data gathered between 2004 and 2013 at two centers specialized in nail disorders were analyzed.
  
  
  RESULTS
  The selected papers encompassed a total of 4,853 psoriatic children, of whom 762 (15.7%) had nail involvement. Concerning our data, a total of 68,839 children were seen in pediatric skin consultation in both clinics over a period of 10 years, 0.11% of which had nail involvement. The rate of psoriatic children presenting nail alterations was 19.4% in the Greek and 15.5% in the Italian patient groups.
  This is the retrospective study including the largest number of cases of nail psoriasis in the pediatric population. Our data are in line with the incidence estimation of the rest of Europe.
authors.affiliation: Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy.
authors.forename: Bianca Maria
authors.initials: BM
authors.lastname: Piraccini
authors.affiliation: Nail Disorders Unit, Second Department of Dermatology, Attikon University Hospital, Athens, Greece.
authors.forename: Ioanna
authors.initials: I
authors.lastname: Triantafyllopoulou
authors.affiliation: Nail Disorders Unit, Second Department of Dermatology, Attikon University Hospital, Athens, Greece.
authors.forename: Christos
authors.initials: C
authors.lastname: Prevezas
authors.affiliation: Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy.
authors.forename: Michela
authors.initials: M
authors.lastname: Starace
authors.affiliation: Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy.
authors.forename: Iria
authors.initials: I
authors.lastname: Neri
authors.affiliation: Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy.
authors.forename: Annalisa
authors.initials: A
authors.lastname: Patrizi
authors.affiliation: Scientific Department, Polichem S.A., Lugano, Switzerland.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Caserini
authors.affiliation: Scientific Department, Polichem S.A., Lugano, Switzerland.
authors.forename: Renata
authors.initials: R
authors.lastname: Palmieri
authors.affiliation: Nail Disorders Unit, Second Department of Dermatology, Attikon University Hospital, Athens, Greece.
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Rigopoulos
keywords: Children; Epidemiological study; Nail psoriasis