Leukodystrophy, Hypomyelinating, 8, with or Without Oligodontia and/or Hypogonadotropic Hypogonadism, also known as hypomyelinating leukodystrophy 8 with or without oligodontia and-or hypogonadotropic hypogonadism, is related to polr3-related leukodystrophy and leukodystrophy, hypomyelinating, 7, with or without oligodontia and/or hypogonadotropic hypogonadism, and has symptoms including cerebellar ataxia, tremor and dysdiadochokinesis. An important gene associated with Leukodystrophy, Hypomyelinating, 8, with or Without Oligodontia and/or Hypogonadotropic Hypogonadism is POLR3B (RNA Polymerase III Subunit B). Affiliated tissues include bone and brain, and related phenotypes are intellectual disability and abnormal pyramidal sign