What identifies cancer cells causing relapse and metastasis? Not CD133

New data, generated by Shahin Rafii and colleagues, at Weill Medical College of Cornell University, New York, through analysis of human colon cancer cells and mice, have shed doubt on the recently proposed designation of the protein CD133 as a marker of colon cancer stem cells — a term given to the small number of cells within a colon cancer that are thought to be able to give rise to a new tumor and that therefore are responsible for tumor recurrence and metastasis.

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