To pass into or invade by metastasis.
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me·tas·ta·size also Brit me·tas·ta·sise mə-'tas-tə-.sīz vi, -sized also Brit -sised; -siz·ing also Brit -sis·ing to spread by metastasis <the lesion already had metastasized beyond the larynx before a diagnosis of carcinoma was made (Amer. Practitioner)>
me·tas·ta·si·za·tion also Brit me·tas·ta·si·sa·tion mə-.tas-tə-sə-'zā-shən n
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vb.
(of a malignant tumour) to spread by metastasis.
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me·tas·ta·size (mə-tasґtə-sīz) to form new foci of disease in a distant part by metastasis.Medical dictionary. 2011.