title: Tetrasomy 21 in an infant with Down syndrome and congenital leukemia.
mesh_terms: D000782:Aneuploidy; D002871:Chromosome Banding; D002904:Chromosomes, Human, 21-22 and Y; D004314:Down Syndrome / Q000235:genetics*; D006801:Humans; D007231:Infant, Newborn; D007621:Karyotyping; D007951:Leukemia, Myeloid / Q000151:congenital* / Q000235:genetics; D008297:Male