title: Letter: Multiple congenital defects associated with an abnormal unclassifiable karyotype.
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics*; D002869:Chromosome Aberrations; D002901:Chromosomes, Human, 13-15; D002904:Chromosomes, Human, 21-22 and Y; D006801:Humans; D007223:Infant; D007621:Karyotyping