BRCA1 and ovarian carcinoma: Furthermore, investigations among 1,763 hereditary BC and ovarian cancer (OC) families have recently found that c.66_68delAG, c.5123C>A, c.1961delA, c.3770_3771delAG, and c.5152+5G>A mutations were in 45.2 % of BRCA1 mutation carriers.