hypomyelinating leukodystrophy 11 (MONDO_0014666, a Monarch Disease Ontology entry) can be described as follows. Any leukodystrophy in which the cause of the disease is a mutation in the POLR1C gene. Also known as: HLD11, POLR1C leukodystrophy, hypomyelinating leukodystrophy type 11, leukodystrophy caused by mutation in POLR1C, leukodystrophy, hypomyelinating, type 11.