title: Bisatellited microchromosomes and multiple congenital malformations.
abstract: The significance of small additional metacentric chromosomes is still unclear. A patient is reported with multiple congenital malformations involving craniofacial structures, the cardiovascular system and gastrointestinal tract, in whom an extra small bisatellited chromosome was detected. The maternal karyotype revealed a marker number 9 chromosome. These cases present a true diagnostic dilemma in genetic counseling, since chromosomal instability may occur in the presence of parental minor structural chromosomal changes.
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics*; D000328:Adult; D002869:Chromosome Aberrations; D002906:Chromosomes, Human, 6-12 and X; D005260:Female; D006801:Humans; D007223:Infant; D011247:Pregnancy