title: Discordant identical twins. 3. Klinefelter's syndrome discordant for carcinoma of the breast.
mesh_terms: D001943:Breast Neoplasms / Q000209:etiology* / Q000652:urine; D004200:Diseases in Twins; D006728:Hormones / Q000652:urine; D006801:Humans; D007713:Klinefelter Syndrome / Q000150:complications* / Q000652:urine; D008297:Male; D008875:Middle Aged
chemical_list: D006728:Hormones