Late-onset cerebellar ataxia and a new frameshift L2HGDH mutation in a Chinese adult with L-2-hydroxyglutaric aciduria: a case report.

L-2-Hydroxyglutaric aciduria (L2HGA) is a rare, autosomal recessive neurometabolic disease, which presents with elevated L-2-hydroxyglutarate acid. Generally, L2HGA appear as slowly progressing central nervous system function deterioration during infancy, and a rapid progression in adulthood is uncommon for the syndrome's classic phenotype.