21 monosomy in a retarded female infant.
D000015:Abnormalities, Multiple / Q000235:genetics*; D000782:Aneuploidy; D002904:Chromosomes, Human, 21-22 and Y; D005260:Female; D006330:Heart Defects, Congenital; D006801:Humans; D006972:Hypertelorism / Q000235:genetics; D007223:Infant; D008607:Intellectual Disability / Q000235:genetics*; D007621:Karyotyping; D008844:Micrognathism / Q000235:genetics