中文摘要：

目的探讨乳腺癌组织雄激素受体（androgen receptor,AR）的表达,分析其在各分子亚型中表达的特点及其意义。方法采用免疫组织化学方法检测AR在335例乳腺浸润性导管癌石蜡包埋组织中的表达,结合66月随访情况,分析AR在五个分子亚型中表达的特点。结果乳腺癌组织中AR阳性率较高,达72.5%,尤其在ER阴性PR阴性乳腺癌病例,AR常常显示阳性（占53.2%）。较多（61.0%）basal-like型乳腺癌AR显示阴性,提示预后欠佳。在luminal Al、uminal B、basal-like以及normal-like亚型中AR阳性组出现局部复发、远处转移或死亡比例较AR阴性组少（P=0.019,0.044,0.034和0.032）,生存曲线也显示了AR阳性患者预后较好（P=0.006,0.013,0.036和0.010）。结论检测乳腺癌AR的表达水平有助于改进和细化乳腺癌的分子分型,为指导个体化治疗提供理论依据。

英文摘要：

Objective To evaluate the expression of AR（androgen receptor,AR） in different molecular subgroups of breast cancer and its significance.Methods Three hundred and thirty-five cases of invasive ductal breast carcinoma were involved in this study.Immunohistochemical expression of AR on paraffin-embedded tumor tissues was analyzed,compared with patients＇ outcome during 66-months＇ follow-up observation,and its implications were evaluated in five molecular subgroups.Results A greater percentage（72.5%） of breast cancer cases displayed nuclear immunoreactivity for AR,and AR expression was found in 53.2% of ER,PR-negative cases.The majority（61.0%） of basal-like breast cancers showed loss of AR expression,which had poor prognosis.In luminal A,luminal B,basal-like,and normal-like subgroups,the occurrence rate of relapse,metastasis and death for AR positive was lower than that of AR negative tumors（P=0.019,0.044,0.034 and 0.032 respectively）.The disease-free survival curves also revealed that the patients with AR expression had a more favorable prognosis than those without it（P=0.006,0.013,0.036 and 0.010）.Conclusion The detection of AR may help improve the molecular subtyping of breast cancer and provide theoretical evidence for individualized treatment.