一个有明显乳腺癌史的家族,当有人被诊断为乳腺癌时,可以从她身上获得乳腺癌基因"癌谱",从而掌握这一家族的乳腺癌基因特点,该家族中的其他女性就可以与此对照,预知自己有没有患乳腺癌的危险,从而制定预防措施。
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