大约10%的乳腺癌是这一类型，不正常的BRCA1和BRCA2基因是导致这一类型癌症的主要原因。

Heredity accounts for about 10% of all breast cancers, and abnormal BRCA1 and BRCA2 genes explain a large number of these cancers.

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同时，也引起了关于紫杉烷类是否对乳腺癌最常见的类型，或激素受体阳性和HER2阴性类型有效的疑问。

In the meantime, questions were raised as to whether taxanes were effective for the most common type of breast cancer, or that which is hormone-receptor positive and HER2-negative.

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题目：那类甲状腺癌患者需要定期刺激试验？

TITLE:Which thyroid cancer patients need periodic stimulation tests?

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