BRCA1 and breast cancer: The spectrum of mutations identified in Uighur women with early-onset and sporadic BC was completely different from that of Kazakhs and includes BRCA1 c.3180insA, c.3538insT, c.3694insAA, c.1963insT, c.3948G>C, c.3182A>C, and c.3538G>T [60].