雌性激素是导致妇女罹患乳腺癌最危险、最典型的致病因素之一。在美国，因乳腺癌致死的妇女人数在癌症榜上位居第二。妇女接触雌性激素的机会越长，其患病机率就越大。男性最易患及的典型恶性肿瘤是前列腺癌。前列腺癌在男性癌症致死病例中同样位居第二，但有关这方面的详尽报 Estrogen is one of the most dangerous and typical causes of breast cancer in women. In the United States, the number of women who have died of breast cancer ranks second in the cancer list. The longer women are exposed to estrogen, the greater their chance of getting sick. The most common malignancy in men is prostate cancer. Prostate cancer also ranks second in men’s cancer-causing deaths, but a full report on this