An organic acidemia characterized by impaired lysine, hydroxylysine, and tryptophan metabolism, increased urinary excretion of glutaric acid, and accumulation of 3-hydroxyglutaric and glutaric acid, resulting in striatal injury and a severe dystonic dyskinetic movement disorder that has_material_basis_in homozygous or compound heterozygous mutation in GCDH on chromosome 19p13.