150. Nail Disorders

  1. Alan D. Irvine MD, FRCPI, FRCP3,4,
  2. Peter H. Hoeger MD5,6 and
  3. Albert C. Yan MD, FAAP, FAAD7,8
  1. Antonella Tosti MD1,2 and
  2. Bianca M. Piraccini MD, PhD2

Published Online: 24 MAY 2011

DOI: 10.1002/9781444345384.ch150

Harper's Textbook of Pediatric Dermatology, Volume 1, 2, Third Edition

Harper's Textbook of Pediatric Dermatology, Volume 1, 2, Third Edition

How to Cite

Tosti, A. and Piraccini, B. M. (2011) Nail Disorders, in Harper's Textbook of Pediatric Dermatology, Volume 1, 2, Third Edition (eds A. D. Irvine, P. H. Hoeger and A. C. Yan), Wiley-Blackwell, Oxford, UK. doi: 10.1002/9781444345384.ch150

Editor Information

  1. 3

    Trinity College, Dublin, Ireland

  2. 4

    Our Lady's Children's Hospital, Dublin, Ireland

  3. 5

    University of Hamburg, Hamburg, Germany

  4. 6

    Catholic Children's Hospital Wilhelmstift, Hamburg, Germany

  5. 7

    University of Pennsylvania School of Medicine, Philadelphia, PA, USA

  6. 8

    The Children's Hospital of Philadelphia, Philadelphia, PA, USA

Author Information

  1. 1

    Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA

  2. 2

    University of Bologna, Bologna, Italy

Publication History

  1. Published Online: 24 MAY 2011
  2. Published Print: 3 JUN 2011

ISBN Information

Print ISBN: 9781405176958

Online ISBN: 9781444345384



  • exostosis;
  • koilonychia;
  • lichen planus;
  • nails;
  • naevi;
  • onychodystrophy;
  • parakeratosis pustulosa;
  • paronychia;
  • psoriasis;
  • trachyonychia


The nails of newborns are thin and soft, and frequently present a certain degree of koilonychia, which is especially evident in toenails. The thickness and breadth of the nail plate increase rapidly during the first two decades of life. Nail diseases are a rather uncommon cause of dermatological consultation in children. Nail signs of congenital and hereditary nail diseases usually develop early during childhood, and their presence may be a clue to the diagnosis of a syndrome or a systemic disorder. Although the acquired nail conditions observed in childhood are similar to those of adults, the prevalence of several diseases may vary in these different age groups. Some conditions, such as parakeratosis pustulosa and twenty-nail dystrophy, are exclusively or typically seen in children.