title: Normal psychomotor development in a child with mosaic trisomy and pericentric inversion of chromosome 9.
abstract: A female infant with trisomy 9 in 58% of her cells is reported. Multiple congenital malformations were present, but she had normal psychomotor development. A pericentric inversion involving a portion of the centromeric heterochromatin of chromosome 9 was identified in the patient and her mother. This variant chromosome 9 was present in duplicate in the trisomic line. Since similar variants of 9qh have been found repeatedly in this syndrome, we feel that this association may be a non-random one.
mesh_terms: D002871:Chromosome Banding; D002906:Chromosomes, Human, 6-12 and X / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D007223:Infant; D007621:Karyotyping; D009030:Mosaicism; D009048:Motor Skills / Q000502:physiology*; D010641:Phenotype; D014314:Trisomy