We present the case histories of Ashkenazi Jewish twins of opposite sex who developed breast cancer simultaneously, in whom testing for the anticipated BRCA2 mutations was unexpectedly negative. Their management and the implications of this difficult situation are discussed.
山东省济南市章丘区文博路2号
齐鲁师范学院 genelibs生信实验室
山东省济南市高新区舜华路750号
大学科技园北区F座4单元2楼
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