Hair shaft abnormalities: Part I


Dr Maureen Rogers, 5, The Crest, Killara, NSW 2071, Australia.


The light microscopic and electron microscopic appearances of the normal hair are briefly described. The major hair shaft abnormalities are reviewed in two parts, discussing clinical characteristics, light and electron microscopy and, where information is available, the pathogenesis of these rare conditions. Part I describes monilethrix, pili torti and trichorrhexis nodosa.