Breast cancer rates in women who did not have prophylactic mastectomy were 12.9% in the surveillance group and 4.3% in the oophorectomy group.

• 监测组为没有进行预防性乳房切除术女性，有12.；9%25发生乳腺癌，而进行卵巢切除术的女性中，乳腺癌的发生率为4