title: Monozygotic twins with trisomy 18: a report of discordant phenotype.
abstract: The predicted incidence of liveborn monozygotic trisomy 18 twins is one per million births. The first case of liveborn monozygotic trisomy 18 twins was reported in 1989 and we report a second case in which striking phenotypic discordance existed. The probability of monozygotic trisomy 18 twinning and the mechanisms for phenotypic discordance in trisomic twins is discussed.
authors: Department of Pediatrics, North Shore University Hospital-Cornell University Medical College, Manhasset, New York 11030.
authors: J S
authors: JS
authors: Schlessel
authors: W T
authors: WT
authors: Brown
authors: A
authors: A
authors: Lysikiewicz
authors: R
authors: R
authors: Schiff
authors: A L
authors: AL
authors: Zaslav
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics*; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D002887:Chromosomes, Human, Pair 18; D004200:Diseases in Twins / Q000235:genetics*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D010641:Phenotype; D014314:Trisomy; D014430:Twins, Monozygotic