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Cancer Warrior
Cancer Caught on Video
1. Early metastasis

This sequence shows an early step in the spread of a cancer (a process called metastasis). A breast cancer cell has traveled in the bloodstream and has arrived at the liver, where it stops because it is too big to keep moving through the tiny blood vessels to get to another organ. The cell appears bright because it has been labeled with a fluorescent dye to help identify it.


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