metastasize

1. V-I If cancer cells metastasize, they spread to another part of the body. (癌细胞)扩散[医学]

A checkup revealed a small tumour on the left lower lobe of his lung, but it had not yet metastasized. 一次检查显示，他的肺部左下叶有一小块肿瘤，但尚未扩散。

...when diagnosis is delayed until cancer has metastasized to other parts of the body. ...当诊断被推迟到癌症已经扩散到身体其他部位的时候。