A boy with 48, XXYY karyotype.
D000015:Abnormalities, Multiple / Q000175:diagnosis; D000328:Adult; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D012729:Sex Chromosome Aberrations / Q000175:diagnosis*