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    GlossaryWoolly Hair Nevus

    rare condition with patches of tightly curled, frizzy hair

    Woolly Hair Nevus (WHN) is a rare, non-hereditary condition characterized by patches of tightly curled, frizzy hair that differ in texture from the individual's normal hair. These patches typically appear at birth or during early childhood and are often associated with pigmented skin lesions or other dermatological abnormalities.

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      Woolly Hair Nevus: A Rare Case with Late Onset in Adolescence

      research Woolly hair nevus

      40 citations , February 1990 in “Journal of The American Academy of Dermatology”
      A 17-year-old developed woolly hair nevus in adolescence, which is unusual, and over time the hair darkened and straightened slightly, but microscopic changes persisted.
      Hair Follicle Miniaturization in a Woolly Hair Nevus

      research Hair Follicle Miniaturization in a Woolly Hair Nevus

      6 citations , February 2016 in “American Journal of Dermatopathology”
      The boy with woolly hair nevus had thinner hair and abnormal hair follicles, which improved with treatment but worsened when treatment stopped.
      JAAD Grand Rounds Quiz on Dermatological Conditions

      research JAAD Grand Rounds quiz∗

      August 2010 in “Journal of The American Academy of Dermatology”
      The document explains the diagnosis and characteristics of woolly hair nevus and alopecia neoplastica.
      Woolly Hair in Two Siblings

      research Woolly Hair in Two Siblings

      January 2012 in “International Journal of Trichology”
      Two siblings have a rare genetic condition causing curly, coarse hair.

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