Klinefelter's syndrome in identical twins with the 46,XX chromosome constitution.
D002610:Cheek / Q000166:cytology; D004200:Diseases in Twins / Q000235:genetics*; D006801:Humans; D007621:Karyotyping; D007713:Klinefelter Syndrome / Q000235:genetics*; D007962:Leukocytes / Q000166:cytology; D007985:Leydig Cells / Q000166:cytology; D008297:Male; D008875:Middle Aged; D010641:Phenotype; D012728:Sex Chromatin; D012730:Sex Chromosomes; D013737:Testis / Q000166:cytology