This syndrome is characterized by childhood-onset progressive ataxia and cerebellar atrophy. The disease is MONDO_0012784 (autosomal recessive ataxia due to ubiquinone deficiency). Also known as: ARCA2, SCAR9, autosomal recessive ataxia due to coenzyme Q10 deficiency, autosomal recessive cerebellar ataxia type 2, autosomal recessive spinocerebellar ataxia type 9, coenzyme Q10 deficiency, primary, type 4.