Keywords breast cancer families;CHEK2 gene;mutation;PCR-SSCP;DNA sequencing;breast cancer;family history positive;clinical characteristics;prognosis;

• 关键词乳腺癌家系;CHEK2基因;基因突变;PCR-SSCP;DNA测序;乳腺癌;乳腺癌家族史阳性;临床特点;预后;