title: A case of 48,XXY,21+ in an infant with Down's syndrome.
mesh_terms: D001773:Blood Cells / Q000166:cytology; D002904:Chromosomes, Human, 21-22 and Y; D004314:Down Syndrome / Q000235:genetics*; D006801:Humans; D007223:Infant; D007621:Karyotyping; D008297:Male; D008856:Microscopy, Fluorescence; D012728:Sex Chromatin; D012730:Sex Chromosomes; D012867:Skin / Q000166:cytology; D014314:Trisomy