Journal
AMERICAN JOURNAL OF MEDICAL GENETICS PART A
Volume 120A, Issue 4, Pages 533-536Publisher
WILEY-LISS
DOI: 10.1002/ajmg.a.20089
Keywords
terminal deletion chromosome 20; chromosomal mosaicism; autistic disorder; mental retardation; seizures
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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. (C) 2003 Wiley-Liss, Inc.
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