hereditary spastic paraplegia 56 (MONDO_0014015, a Monarch Disease Ontology id) is any hereditary spastic paraplegia in which the cause of the disease is a mutation in the CYP2U1 gene. Also known as: CYP2U1 hereditary spastic paraplegia, SPG56, autosomal recessive spastic paraplegia 56, autosomal recessive spastic paraplegia type 56, hereditary spastic paraplegia caused by mutation in CYP2U1, hereditary spastic paraplegia type 56.