title: A 19-month-old girl of South Indian parents presented to a general pediatric clinic for evaluation of global developmental regression.
authors.affiliation: Division of Child and Adolescent Neurology, Mayo Clinic, Rochester, MN. Electronic address: Kenney.Daniel@mayo.edu.
authors.forename: Daniel
authors.initials: D
authors.lastname: Kenney
authors.affiliation: Division of Neonatology, University of California, San Francisco, San Francisco, CA.
authors.forename: Andrea C
authors.initials: AC
authors.lastname: Wickremasinghe
authors.affiliation: Department of Pediatric & Adolescent Medicine, Mayo Clinic, Rochester, MN.
authors.forename: Nusheen
authors.initials: N
authors.lastname: Ameenuddin
authors.affiliation: Division of Child and Adolescent Neurology, Mayo Clinic, Rochester, MN.
authors.forename: Marc C
authors.initials: MC
authors.lastname: Patterson
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007194:India / Q000208:ethnology; D007223:Infant; D010372:Pediatrics; D013661:Tay-Sachs Disease / Q000175:diagnosis* / Q000235:genetics / Q000503:physiopathology