A child with double trisomy: 48,XYY,+18.
D000015:Abnormalities, Multiple / Q000235:genetics; D002902:Chromosomes, Human, 16-18; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010641:Phenotype; D012729:Sex Chromosome Aberrations; D014314:Trisomy; D014997:XYY Karyotype