The prevalence of BRCA1/2 mutations of triple-negative breast cancer patients in Xinjiang multiple ethnic region of China

Table 3 BRCA1/2 mutation prevalence in unselected/selected triple-negative breast cancer (TNBC) patients

	Number of cases	*BRCA1* mutations (%)	*BRCA2* mutations (%)	Total *BRCA1/2* mutations (%)
All selected TN	35	7 (20)	3 (8.6)	9 (25.7)
< 35 years	6	1 (16.7)	1 (16.7)	2 (33.3)
≥ 35 years	29	6 (20.7)	2 (6.9)	7 (24.1)^a
All unselected TN	61	11 (18)	4 (6.6)	15 (24.6)
< 35 years	20	4 (20)	1 (5)	5 (25)
≥ 35 years	41	7 (17.1)	3 (7.3)	10 (24.4)

Selection criteria: Selected = bilateral breast cancer and/or family history of TNBC; Unselected = TNBC.
^aBoth BRCA1 and BRCA2 mutations were identified in one patient with family history, and she was 47 years old.

ISSN: 2047-783X