title: A patient with Edwards syndrome caused by a rare pseudodicentric chromosome 18 of paternal origin.
abstract: We present an unusual case of trisomy 18 due to a pseudodicentric chromosome 18 of paternal origin. The karyotype was: 46,XY, -18, +psu dic(18)(qter-->cen-->p11.31::p11.31-->psucen-->qter). The origin of the abnormal chromosome was verified by FISH with a painting probe from chromosome 18. Absence of short-arm telomeres was shown by multicolor FISH, and the results of DNA analysis showed monosomy for loci D18S59 and D18S170 as well as paternal inheritance of the aberrant chromosome. The child's phenotype was characteristic of trisomy 18.
authors.affiliation: Department of Biological Psychiatry, Institute for Basic Research, Psychiatric Hospital in Aarhus, Risskov, Denmark. cg@afdm.aau.dk
authors.forename: C H
authors.initials: CH
authors.lastname: Gravholt
authors.forename: M
authors.initials: M
authors.lastname: Bugge
authors.forename: H
authors.initials: H
authors.lastname: Strømkjaer
authors.forename: M
authors.initials: M
authors.lastname: Caprani
authors.forename: U
authors.initials: U
authors.lastname: Henriques
authors.forename: M B
authors.initials: MB
authors.lastname: Petersen
authors.forename: C A
authors.initials: CA
authors.lastname: Brandt
mesh_terms: D002503:Centromere / Q000235:genetics; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D002887:Chromosomes, Human, Pair 18 / Q000235:genetics*; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007231:Infant, Newborn; D007621:Karyotyping; D008297:Male; D011110:Polymorphism, Genetic; D013577:Syndrome; D014314:Trisomy