Polr3-Related Leukodystrophy, also known as 4h leukodystrophy, is related to leukodystrophy, hypomyelinating, 8, with or without oligodontia and/or hypogonadotropic hypogonadism and leukodystrophy. An important gene associated with Polr3-Related Leukodystrophy is POLR3B (RNA Polymerase III Subunit B), and among its related pathways/superpathways are RNA Polymerase III Transcription Initiation and Cytosolic sensors of pathogen-associated DNA. Affiliated tissues include thyroid and eye, and related phenotypes are ataxia and dysarthria