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Norton-Simon hypothesis

Pronunciation: nor'ton si'mon

Definition: hypothesis that a tumor is composed of populations of faster-growing cells, which are sensitive to therapy, and slower-growing, more resistant cells. Given that only therapy that completely eradicates all tumor cells will be curative, this is most likely to occur with sequential, non–cross-resistant regimens. The initial regimen must be effective enough to result in a low residual tumor burden and is followed by one or more non–cross-resistant treatments to eradicate the remainder of the cancer.

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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