title: A pseudoisochromosome 18q and an isodicentric chromosome 18.
abstract: A case of pseudoisochromosome 18q of prezygotic origin and a case of isodicentric chromosome 18 of postzygotic origin are presented to validate the differentiation between a true isochromosome and a pseudoisochromosome. This differentiation may be useful in elucidating the mechanism of the origin of an isochromosome.
authors.affiliation: Department of Pediatrics, University of Illinois, Chicago.
authors.forename: C
authors.initials: C
authors.lastname: Floore
authors.forename: A
authors.initials: A
authors.lastname: Robertson
authors.forename: I
authors.initials: I
authors.lastname: Samuel
authors.forename: N
authors.initials: N
authors.lastname: Williamson
authors.forename: D R
authors.initials: DR
authors.lastname: McLeod
authors.forename: G
authors.initials: G
authors.lastname: Hoganson
authors.forename: J J
authors.initials: JJ
authors.lastname: Hoo
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics* / Q000473:pathology; D002869:Chromosome Aberrations; D002871:Chromosome Banding; D002887:Chromosomes, Human, Pair 18; D005260:Female; D006801:Humans; D007231:Infant, Newborn