These patients had been operated on for the primarycancer but there was evidence of secondary tumours.
这些病人曾因原发性癌症做过手术，但是又有了继发性肿瘤迹象。
《柯林斯英汉双解大词典》
2
Primary amyloidosis isn't associated with other diseases - except for multiple myeloma, a form of bone marrow cancer.
原发性淀粉样变通常不伴有其他疾病——骨髓肉瘤(一种骨髓恶性肿瘤)除外。
3
There isn't a single drug currently on the market that addresses how cancer cells break loose from a primary tumor and get into the vascular system, migrate out, and form a secondary tumor.
麻省理工学院生物与机械工程学塞西尔与艾达·格林（Cecil and Ida Green）杰出教授卡姆说，“市场上没有一种药能说明癌细胞如何挣脱原来的瘤、进入血管系统、迁出并形成继发瘤。