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雌激素受体、孕激素受体和人类上皮因子受体2表达的乳腺癌亚型的MRI表现特征分析对照研究 被引量:26

Breast cancer subtypes based on ER/PR and Her2 expression: comparison of mr imaging features
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摘要 目的探讨基于雌激素受体(ER),孕激素受体(PR)和人类上皮因子受体2(Her2)表达的乳腺癌亚型的MRI特征表现,从影像学角度来预测癌基因的异常表达。方法回顾性分析2007年2月至2011年1月杭州市中医院有完整MR资料,并经病理证实的267例乳腺癌患者的临床、病理和影像学资料。根据BI-RADS的标准,评价MRI表现,包括病灶类型、数目、形态、肿块边缘、肿块信号强度、肿块强化方式及时间-信号增强曲线类型。根据免疫组化中的ER、PR与Her2表达情况将乳腺癌分为4组:(1)ER/PR+、Her2+组;(2)ER/PR+、Her2-组;(3)ER/PR-、Her2+组;(4)ER/PR-、Her2-组,对比4组之间的差异。分类变量采用,检验和Fisher确切概率法分析。组间两两比较采用矿分割。结果4组乳腺癌亚型病灶类型分布不同,组间差异有统计学意义(χ2=41.267,P〈0.001),其中ER/PR+、Her2+组与ER/PR-、Her2+组中段样或线样强化方式所占比例较高[25.6%(11/43),36.1%(13/36)],组间差异无统计学意义(χ2=1.112,P=0.641),将两组合并与ER/PR+、Her2-组及ER/PR-、Her2-组比较,差异有统计学意义(χ2=32.793,P〈0.001;χ2=14.565,P〈0.001)。ER/PR-、Her2-组占总病例数14.6%(39/267),以肿块型为主(92.3%,36/39),多为单发(91.7%,33/36)。与其他组分别比较,ER/PR-、Her2-组肿块边缘多光滑[58.3%(21/36),P〈0.001];在T2WI压脂像,肿块内部超高信号占33.3%(12/36),肿块周边高信号占30.6%(11/36),均高于其他组,组间差异有统计学意义(P〈0.001);增强以早期环形强化为主[80.6%(29/36),P〈0.001]。而肿块数目、肿块形态及肿块动态增强模式,组间差异均无统计学意义(χ2=1.413,P=0.713;χ2=8.423,P=0.204;χ2=4.657,P=0.540)。结论段样或线样强化同时结合TIC曲线(呈Ⅱ型或Ⅲ型),有利于预测Her2+乳腺癌。早期环形强化的肿块为ER/PR-、Her2-乳腺癌最为重要的MRI特征,其余特征包括边缘光滑的乳腺肿块、在T2WI压脂像肿块内部存在超高信号及肿块周边高信号。 Objective To evaluate the magnetic resonance (MR) imaging findings of breast cancer subtypes based on the profiles of ER/PR and Her2. Methods A retrospective study was conducted for 267 breast cancer subjects between February 2007 and January 2011. Clinicopathologic features and MR imaging findings of four subtypes were compared. The Chi-square(χ2) test, Fisher's exact test andχ2 section method were employed for categorical variables. Results MR imaging findings:Patients with segment or linear enhancement type accounted for 25.6% in ER/PR+ , Her2 + subtype group and 36. 1% in ER/PR- , Her2+ subtype, no significant difference existed between them (χ2 = 1. 112, P = 0.641 ). But they were significantly higher than ER/PR + , Her2 - subtype group and ER/PR - , Her2 - subtype group (χ2 = 32. 793,P 〈 0. 001 ; ,χ2= 14. 565, P 〈 0. 001 ). ER/PR- , Her2 - subtype patients accounted for 14. 6% of the total breast cancer patients( 39/267 ). Subjects with ER/PR- , Her2- subtype were more likely to present unifocal (91.7%, 33/36)and mass type lesion(92.3%, 36/39).The mass type lesions in ER/PR-, Her2- subtype group were more likely to showed smooth margin [ 58.3% ( 21/36 ), P 〈 0. 001 ], very high intratumoral signal and peripheral hyperintense pattern on fat suppression T2-weighted imaging( P 〈 0. 001 ) and early rim enhancement [ 81.5% (29/36), P 〈 0. 001 ]. No significantly difference of four subtypes were found on number of mass, mass shape and pattern at dynamic enhancement imaging(χ2 = 1. 413, P = 0. 713 ; χ2 = 8.423, P = 0. 204 ; χ2 = 4. 657, P = 0. 540 ). Conclusion Segment or linear enhancement type is characterized by MR imaging. Early rim enhanced mass is ER/PR-, Her2-breast cancer. The most important characteristics of MR imaging include a smooth edge of breast mass, very high intratumoral signal on fat suppression T2-weighted imaging and peripheral hyperintense pattern.
出处 《中华医学杂志》 CAS CSCD 北大核心 2013年第11期819-823,共5页 National Medical Journal of China
关键词 磁共振成像 乳腺肿瘤 受体 雌激素 Magnetic resonance imaging Breast neoplasms Receptors, estrogen
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参考文献11

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