Objective: To study the role of the hereditary breast and orarian cancer susceptibiliry gene(BRCAl) mutation and estrogen receptor(ER) in breast cancer and study the relationship between BRCA1 and ER.

• 目的 探讨与遗传性乳腺癌与卵巢癌相关的易感基因(Hereditary breast and orarian cancer susceptibility gene, BRCA1)基因突变、雌激素受体(Estrogen receptor, ER)在乳腺癌中的作用以及二者之间的关系。