title: Corpus callosum morphometrics in young children with autism spectrum disorder.
abstract: This study assessed midsagittal corpus callosum cross sectional areas in 3-4 year olds with autism spectrum disorder (ASD) compared to typically developing (TD) and developmentally delayed (DD) children. Though not different in absolute size compared to TD, ASD callosums were disproportionately small adjusted for increased ASD cerebral volume. ASD clinical subgroup analysis revealed greater proportional callosum reduction in the more severely affected autistic disorder (AD) than in pervasive developmental disorder-not otherwise specified (PDD-NOS) children. DD children had smaller absolute callosums than ASD and TD. Subregion analysis revealed widely distributed callosum differences between ASD and TD children. Results could reflect decreased inter-hemispheric connectivity or cerebral enlargement due to increase in tissues less represented in the corpus callosum in ASD.
authors.affiliation: Department of Radiology, 5C-1, Children's Hospital & Regional Medical Center, 4800 Sand Point Way NE, Seattle, WA, 98105, USA.
authors.forename: Inbal
authors.initials: I
authors.lastname: Boger-Megiddo
authors.forename: Dennis W W
authors.initials: DW
authors.lastname: Shaw
authors.forename: Seth D
authors.initials: SD
authors.lastname: Friedman
authors.forename: Bobbi F
authors.initials: BF
authors.lastname: Sparks
authors.forename: Alan A
authors.initials: AA
authors.lastname: Artru
authors.forename: Jay N
authors.initials: JN
authors.lastname: Giedd
authors.forename: Geraldine
authors.initials: G
authors.lastname: Dawson
authors.forename: Stephen R
authors.initials: SR
authors.lastname: Dager
mesh_terms: D000704:Analysis of Variance; D001321:Autistic Disorder / Q000175:diagnosis*; D001699:Biometry; D001921:Brain / Q000473:pathology; D002675:Child, Preschool; D003337:Corpus Callosum / Q000473:pathology*; D002658:Developmental Disabilities / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male; D008432:Mathematical Computing; D012016:Reference Values; D012737:Sex Factors