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Woolly hair nevus

Disease definition

Woolly hair nevus (WHN) is a rare non-familial hair anomaly characterized by kinky, tightly coiled, and hypopigmented fine hair with an average diameter of 0.5 cm, noted, since birth or during the first two years of life, in a localized circumscribed distribution on the scalp. Occassionally, WHN grows in areas observed to be alopecic in the neonatal period. WHN can be associated with features like ocular defects (persistent pupillary membrane, retinal defects), precocious puberty, and epidermal nevi.

ORPHA:79414

Classification level: Disorder
  • Synonym(s):
    • Wooly hair nevus
  • Prevalence: -
  • Inheritance: Not applicable 
  • Age of onset: Neonatal, Infancy
  • ICD-10: D23.4
  • ICD-11: LC01
  • OMIM: 162900
  • UMLS: C0343114
  • MeSH: -
  • GARD: -
  • MedDRA: -

  A summary on this disease is available in Español (2015) Italiano (2015) Nederlands (2015)

Additional information

Further information on this disease

Patient-centred resources for this disease

Research activities on this disease

Specialised Social Services

The documents contained in this web site are presented for information purposes only. The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.