Long-term follow-up in infantile-onset SCAR18: A case report.

: Autosomal recessive spinocerebellar ataxia type 18 (SCAR18) is caused by pathogenic variants in the Glutamate Receptor, Ionotropic, Delta-2 (GRID2) gene. We describe the long-term follow-up from 1 to 31 years of an Italian patient with congenital SCAR18 who is compound heterozygous for a maternally-inherited nonsense variant and a de novo microdeletion. To date, this is the longest follow-up in congenital SCAR18.