Unusual endocrine and somatic phenotypic abnormalities in a 14-year-old boy with classic Klinefelter syndrome (47,XXY).
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D000293:Adolescent; D020249:Hormone Replacement Therapy; D006801:Humans; D007621:Karyotyping; D007713:Klinefelter Syndrome / Q000503:physiopathology*; D008297:Male; D010641:Phenotype; D013739:Testosterone / Q000097:blood / Q000627:therapeutic use*
D013739:Testosterone