title: Trisomy 21q: 46,XX,21s+/47,XX,+21q-(q22----qter) mosaicism (de novo) in a Down syndrome child.
mesh_terms: D002675:Child, Preschool; D002904:Chromosomes, Human, 21-22 and Y; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D006801:Humans; D007621:Karyotyping; D009030:Mosaicism; D014314:Trisomy