Corrigendum to "Novel homozygous GBA2 mutation in a patient with complicated spastic paraplegia" [Clin. Neurol. Neurosurg. 168 (May) (2018) 60-63] (S0303846718300933) (10.1016/j.clineuro.2018.02.042))

Hereditary spastic paraplegias (HSPs) are a heterogeneous group of neurological disorders characterized primarily bya pyramidalsyndrome withlowerlimb spasticity, which canmanifestas pureHSP orassociated witha number of neurological or non-neurological signs (i.e., complicated HSPs). The clinical variability of HSPs is associated with a wide genetic heterogeneity, with more than eighty causative genes known. Recently, next generation sequencing (NGS) has allowed increasing genetic definition in such a heterogeneous group of disorders. We report on a 56- year-old man affected by sporadic complicated HSP consisting of a pyramidal syndrome, cerebellar ataxia, congenital cataract, pes cavus, axonal sensory-motor peripheral neuropathy and cognitive decline. Brain MRI showed cerebellar atrophy and thin corpus callosum. By NGS we found a novel homozygous biallelic c.452-1G > C mutation in the b-glucosidase 2 gene (GBA2), known to be causative for autosomal recessive hereditary spastic paraplegia type 46 (SPG46). The rarity of this inherited form besides reporting on a novel mutation, expands the genetic and clinical spectrum of SPG46 related HSP.