title: Methylmalonic acidemia with a severe chemical but benign clinical phenotype.
abstract: A 5-year-old boy of West African origin had methylmalonic acidemia with a mut- enzyme phenotype, no clinical response to hydroxycobalamin, and metabolite measurements indicative of the severe form of mutase deficiency. His development, both mental and physical, was satisfactory and he had no episodes of metabolic decompensation. The explanation for the neurotoxic effects and metabolic decompensation in typical methylmalonic acidemia and the (allelic) genotype that explains this patient's phenotype are uncertain.
authors.affiliation: DeBelle Laboratory for Biochemical Genetics, Montreal Children's Hospital, Quebec, Canada.
authors.forename: E
authors.initials: E
authors.lastname: Treacy
authors.forename: C
authors.initials: C
authors.lastname: Clow
authors.forename: O A
authors.initials: OA
authors.lastname: Mamer
authors.forename: C R
authors.initials: CR
authors.lastname: Scriver
mesh_terms: D000592:Amino Acid Metabolism, Inborn Errors / Q000652:urine*; D002675:Child, Preschool; D005838:Genotype; D006801:Humans; D008297:Male; D008764:Methylmalonic Acid / Q000652:urine*; D010641:Phenotype
chemical_list: D008764:Methylmalonic Acid