Any hereditary spastic paraplegia in which the cause of the disease is a mutation in the WASHC5 gene. The disease is hereditary spastic paraplegia 8 (MONDO_0011339, a Monarch Disease Ontology identifier). Also known as: SPG8, WASHC5 hereditary spastic paraplegia, autosomal dominant spastic paraplegia 8, autosomal dominant spastic paraplegia type 8, hereditary spastic paraplegia caused by mutation in WASHC5, hereditary spastic paraplegia type 8.