They found invasive cancer during a routine examination.

他们在一次例行检查中发现了扩散的癌细胞。

《柯林斯英汉双解大词典》

The positive rates of PTEN in invasive cancer were lower than noninvasive breast cancer and the control group(P<0.01).

浸润性乳腺癌中PTEN的表达低于非浸润性乳腺癌及非肿瘤病变组织对照组（P<0.01）。

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A patient was considered to have had a complete pathologic response if no residual invasive cancer was present on final specimen analysis.

只有那些没有浸润性癌残留，有完全病理缓解的病人才作为最后的标本分析。

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The trial looked at precancerous legions, early forms of cervical cancer and invasive cancer.

FORBES

Even in the precancerous stage, called ductal carcinoma in situ (DCIS) when abnormal cells are confined to a milk duct, physicians almost always advise women to have a lumpectomy or mastectomy along with radiation, because about 20% of the 65, 000 cases of DCIS found every year in the U.S. become invasive cancer.

WSJ: Can Breast Cancer Be Overtreated?

The authors, from the University of California, San Francisco, noted that even when DCIS becomes an invasive cancer, it's treatable when found at an early stage: The odds that a 60-year old woman with a 7 millimeter breast tumor, would die from it in the next 10 years are less than 3%, half the risk she faces of dying from another cause during that time.

WSJ: Can Breast Cancer Be Overtreated?