Klinefelter's syndrome and cancer of the breast.
D001943:Breast Neoplasms / Q000150:complications* / Q000473:pathology; D002285:Carcinoma, Intraductal, Noninfiltrating / Q000150:complications* / Q000473:pathology; D006177:Gynecomastia / Q000150:complications* / Q000473:pathology; D006801:Humans; D007621:Karyotyping; D007713:Klinefelter Syndrome / Q000150:complications* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012737:Sex Factors