title: Cytogenetic and molecular analysis in trisomy 12p.
abstract: We studied a male patient with de novo pure trisomy 12p syndrome by molecular analysis and fluorescence in situ hybridization (FISH) with markers from chromosome 12. G-banding studies demonstrated a 46,XY, 22p+ karyotype and the banding pattern and clinical findings suggested that the extra chromosomal material was derived from 12p. Trisomy 12p was confirmed by dosage analysis with chromosome 12p markers and FISH analysis with a whole chromosome 12 paint. The de novo re-arranged chromosome was of paternal origin. A comparison of the clinical and cytogenetic findings in this patient was made with previously described cases of trisomy 12p. We propose a classification system for 12p trisomy in order to better characterize the correlative relationships between specific cytogenetic constitution and phenotype.
authors.affiliation: Department of Pediatrics, University of Utah Medical Center, Salt Lake City, USA.
authors.forename: T L
authors.initials: TL
authors.lastname: Allen
authors.forename: A R
authors.initials: AR
authors.lastname: Brothman
authors.forename: J C
authors.initials: JC
authors.lastname: Carey
authors.forename: P F
authors.initials: PF
authors.lastname: Chance
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics*; D000328:Adult; D002871:Chromosome Banding; D002874:Chromosome Mapping; D002881:Chromosomes, Human, Pair 12; D002892:Chromosomes, Human, Pair 22; D005260:Female; D015723:Gene Library; D005819:Genetic Markers; D018392:Genomic Imprinting; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007223:Infant; D008607:Intellectual Disability / Q000235:genetics; D007621:Karyotyping; D008297:Male; D013577:Syndrome; D014314:Trisomy
chemical_list: D005819:Genetic Markers