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Updated: Jul 11, 2025

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非球状侵入性乳腺癌与双性致病性CDH1体质变异:一个组织学,免疫类型和基因组特征
Fatemeh Derakhshan1, Arnaud Da Cruz Paula2, Pier Selenica3
1Department of Pathology and Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, New York; Department of Pathology and Cell Biology, College of Physicians and Surgeons, Columbia University, New York, New York.
概括
双性CDH1变化是侵入性叶状腺癌的标志,在非叶状腺乳腺癌中非常罕见. 这些罕见病例通常呈现为具有特定特征的侵入性导管癌,并且与光线B乳腺癌具有基因组相似性.
科学领域:
- 对乳腺癌亚型的基因组分析.
- 乳腺癌的分子病理学
背景情况:
- CDH1基因突变和E-cadherin损失是侵袭性叶状癌 (ILC) 的特征.
- 在非球状乳腺癌 (NL-BCs) 中很少观察到双性CDH1变化.
研究的目的:
- 调查NL-BCs的临床病理特征与双基因CDH1遗传变化.
- 为了确定这些罕见的NL-BCs中的基因变异的频谱.
- 将这些NL-BCs的基因组资料与ILCs和侵入性导管癌 (IDCs) 进行比较.
主要方法:
- 分析了5842种乳腺癌,使用临床瘤正常测序和FDA批准的多基因组.
- 确定具有双基CDH1致病性/可能致病性体质突变和缺少叶状特征的病例.
- 识别的NL-BCs与ILCs和IDCs的比较基因组分析.
主要成果:
- 在5842例 (0.11%) 的乳腺癌中,只有7例表现出双基CDH1变异而没有叶状特征.
- 这些NL-BC包括各种侵入性导管癌亚型,主要是ER阳性/HER2阴性.
- 基因组分析显示TP53和PIK3CA的反复变化,与野生型IDC-NSTs相比,GATA3突变的频率较低.
结论:
- 具有双基CDH1变化的NL-BCs非常罕见,通常呈现为具有特殊组织学特征的IDCs.
- 这些瘤的基因组形状类似于光线B ER阳性乳腺癌.
- 这些发现有助于理解乳腺癌的分子异质性,超出了典型的叶状组织学.
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