Breast cancer is no longer considered a single disease.
乳腺癌不再是一种单一的疾病。
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Although age is the biggest single risk factor - 80% of breast cancers are diagnosed in women over the age of 50 - being overweight after the menopause increases your risk even further.
The study compared a combination of chemotherapy drugs - the standard treatment - to a single drug in patients with early-stage breast cancer aged 65 and older.