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- W4239005280 abstract "Breast cancer is the most commonly diagnosed cancer among women. Although many studies have reported the BRCA mutations among breast cancer patients, few studies have focused among Chinese early-onset breast cancer patients. The purpose of this study is to identify BRCA1 and BRCA2 mutation features and their clinical significance of early-onset Chinese breast cancer patients.A total of 54 female patients diagnosed with breast cancer were enrolled in this study, of which 27 were younger than 40 (study group, mean age 32 years, range, 23-40 years) and 27 were older than 40 (control group, mean age 52 years, range, 41-68 years). Tumor FFPE samples were collected for somatic mutation test, while blood samples or normal tissue were used for germline mutation by both PGM and Miseq platform. All codon exons and functional introns for BRCA1/2 were covered. The clinical significance of mutation types was cross analyzed in several available database. The novel mutations were confirmed by sanger sequencing.In study group, 14.8% (4/27) and 3.7% (1/27) patients had deleterious BRCA1/2 germline and somatic mutations respectively. While in control group, only 3.7% (1/27) and 7.4% (2/27) had deleterious BRCA1/2 germline and somatic mutations respectively. BRCA1 germline mutation c.2623C>T and BRCA2 germline mutation c.5852G>A were found to be novel mutation sites and confirmed by sanger sequencing.Our study found two novel BRCA1/2 mutation sites in early-onset breast cancer, and also showed that early-onset breast cancer patients are more likely to harbor germline mutations with deleterious and uncertain significance." @default.
- W4239005280 created "2022-05-12" @default.
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- W4239005280 date "2019-04-01" @default.
- W4239005280 modified "2023-09-26" @default.
- W4239005280 title "BRCA1/2 mutation spectrum in Chinese early-onset breast cancer" @default.
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- W4239005280 doi "https://doi.org/10.21037/tcr.2019.03.02" @default.
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