Peripheral and central hypomyelination with hypogonadotropic hypogonadism and hypodontia

Neurology. 2006 Dec 12;67(11):2066-9. doi: 10.1212/01.wnl.0000247666.28904.35.


We identified four unrelated patients (three female, one male) aged 20 to 30 years with hypomyelination, pituitary hypogonadotropic hypogonadism, and hypodontia. Electron microscopy and myelin protein immunohistochemistry of sural nerves showed granular debris-lined clefts, expanded abaxonal space, outpocketing with vacuolar disruption, and loss of normal myelin periodicity. Reduced galactocerebroside, sphingomyelin, and GM1-N-acetylglucosamine and increased esterified cholesterol were found. This is a clinically homogeneous progressive hypomyelinating disorder. The term 4H syndrome is suggested.

Publication types

  • Research Support, N.I.H., Intramural

MeSH terms

  • Adult
  • Anodontia / complications
  • Anodontia / pathology*
  • Demyelinating Diseases / complications
  • Demyelinating Diseases / pathology*
  • Female
  • Humans
  • Hypogonadism / complications
  • Hypogonadism / pathology*
  • Male
  • Pituitary Gland / pathology
  • Sural Nerve / pathology