title: Autistic disorder and chromosomal mosaicism 46,XY[123]/46,XY,del(20)(pter --> p12.2)[10].
abstract: We report on a 3-year-old boy with a moderate to severe mental retardation, autistic behavior patterns, and myoclonic epilepsy of early childhood. The cytogenetic analysis of blood lymphocytes revealed a deletion of chromosome 20pter --> p12.2 occurring as mosaicism in 8% of the analyzed metaphases: 46,XY[123]/46,XY,del(20)(pter --> p12.2)[10]. The deletion was confirmed by the recently developed multicolor banding approach and additionally by region specific fluorescence in situ hybridization (FISH) probes. To the best of our knowledge, this is the first report on a patient with autistic behavior with terminal 20p deletion mosaicism reported up to present.
authors.affiliation: Institute of Human Genetics, University of Göttingen, Germany. ssauter@gwdg.de
authors.forename: S
authors.initials: S
authors.lastname: Sauter
authors.forename: G
authors.initials: G
authors.lastname: von Beust
authors.forename: P
authors.initials: P
authors.lastname: Burfeind
authors.forename: A
authors.initials: A
authors.lastname: Weise
authors.forename: H
authors.initials: H
authors.lastname: Starke
authors.forename: T
authors.initials: T
authors.lastname: Liehr
authors.forename: B
authors.initials: B
authors.lastname: Zoll
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics; D001321:Autistic Disorder / Q000235:genetics*; D002675:Child, Preschool; D002871:Chromosome Banding; D002872:Chromosome Deletion; D002890:Chromosomes, Human, Pair 20; D004831:Epilepsies, Myoclonic / Q000235:genetics; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D008607:Intellectual Disability / Q000235:genetics; D007621:Karyotyping; D008297:Male; D009030:Mosaicism / Q000235:genetics*