Metastasized

[Sarah]

When tumor cells metastasize, the new tumor is called a secondary or [metastatic] tumor, and its cells are like those in the original tumor. This means, for example, that, if breast cancer spreads (metastasizes) to [the lung], the secondary tumor is made up of abnormal breast cells, not of abnormal lung cells. [The tumor] in the lung is then called metastatic breast cancer, not lung cancer.

[Kai]

past simple and past participle of metastasize