Metastatic potential: generic predisposition of the primary tumor or rare, metastatic variants-or both?

Abstract excerpt

Metastasis is a rare event. Does it arise from rare, variant, highly metastatic cells or does a primary tumor progress to a premalignant state from which metastases arise stochastically without further changes in gene expression? Arguments and evidence have been adduced to support either position. A paper in this month's Cancer Cell and other arguments instead suggest models combining features of both.

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