MONDO_0013722 (hypomyelinating leukodystrophy 8 with or without oligodontia and-or hypogonadotropic hypogonadism) can be described as follows. Any leukodystrophy in which the cause of the disease is a mutation in the POLR3B gene. Also known as: HLD8, POLR3B leukodystrophy, endosteal sclerosis-cerebellar hypoplasia syndrome, leukodystrophy caused by mutation in POLR3B.