© 1999 by Oxford University Press
Journal of the National Cancer Institute, Vol. 91, No. 6, 487,
March 17, 1999
© 1999 Oxford University Press
IN THIS ISSUE |
Tumor shrinkage is a common end point used in screening new cytotoxic agents. The
standard criterion for partial response is a decrease of 50% or more in the sum of individual
products of two tumor measurements: the maximum diameter of a lesion and the largest diameter
perpendicular to it. Theoretically, the simple sum of the maximum diameters of individual
tumors is more linearly related to cell kill than is the sum of the bidimensional products. James et
al. (p. 523) hypothesized that a 30% decrease in the sum of the maximum
diameters of
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