Objective To investigate the role of E-cadherin and antigen identified by monoclonal antibody Ki-67 in the occurrence and development of non-special type of invasive ductal carcinoma of breast. Methods The expression of E-cadherin and Ki-67 in 100 non-special type of invasive ductal carcinoma ( breast cancer group) and 20 breast fibroadenoma tissues ( fibroadenoma group) were detected by immunohistochemistry, and the relationship between these two antibodies and the clinicopathological features of non-special type of invasive ductal carcinoma were analyzed. Results The breast cancer group (67％) was lower than than the fibroadenoma group ( 100％ ) in E-csdherin positive expression rate, and was ( 59％ ) higher than the fibroadenoma group( 25％ ) in Ki-67 positive expression rate, both P ＜ 0.05; the expression of E-cadherin and Ki-67 were closely related to non-special type of invasive ductal carcinoma of breast in it's lymph node metastasis, TNM stage and histological grade, but not in patients' age and tumor diameter. Conclusions Reduced expression of E-cadherin and elevated expression of Ki-67 were closely related to non-special type of invasive ductal carcinoma of breast in it's occurrence and development, and detection of these two antibodies is helpful for determining the degree of malignancy and prognosis of non-special type of invasive ductal carcinoma of breast.%目的 探讨E-钙黏蛋白和增殖指数抗原Ki-67在非特殊型乳腺浸润性导管癌发生、发展中的作用.方法 采用免疫组化法检测E-钙黏蛋白和Ki-67在100份非特殊型乳腺浸润性导管癌组织(乳腺癌组)及20份乳腺纤维腺瘤组织(纤维腺瘤组)中的表达,并分析两者与非特殊型乳腺浸润性导管癌临床病理特征的关系.结果 乳腺癌组E-钙黏蛋白的阳性率(67%)明显低于纤维腺瘤组(100%),Ki-67的阳性率(59%)高于纤维腺瘤组(25%),P均＜0.05;E-钙黏蛋白和Ki-67表达与非特殊型乳腺浸润性导管癌淋巴结转移、TNM分期、组织学分级密切相关,与患者年龄、肿瘤直径无明显相关性.结论 E-钙黏蛋白表达降低、Ki-67表达升高与非特殊型乳腺浸润性导管癌的发生、发展密切相关,检测两者有助于判断非特殊型乳腺浸润性导管癌的恶性程度及预后.
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