Definition of metastasis - NCI Dictionary of Cancer Terms

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metastasis (meh-TAS-tuh-sis)

The spread of cancer from one part of the body to another. A tumor formed by cells that have spread is called a “metastatic tumor” or a “metastasis.” The metastatic tumor contains cells that are like those in the original (primary) tumor. The plural form of metastasis is metastases (meh-TAS-tuh-SEEZ).

Previous Definitions:	metabolite, metallic, metaplasia, metaplastic carcinoma, metastasectomy
Next Definitions:	metastasize, metastatic, metastatic cancer, metasynchronous, meteorism