A: Effect of LDM and MTD chemotherapy on HT29 liver metastatic nodule size. Left: Histogram of pooled cross-sectional metastatic diameter (Ø). Middle: Metastatic diameter (Ø) by chemotherapy regimen. A decreasing linear trend for median metastatic diameter was observed (left to right, slope = -143.2, P = 0.043 by post-test for trend). Right: Dichotomized metastatic size at median diameter of vehicle-treated tumors. Liver nodule size was classified as small (blue) or large (red). Individual nodule counts per group and size category (small/large) are plotted on the right ordinate. χ2 (df=5) = 6.80; P= 0.2361 (not significant) for overall effects on size; χ2 (df=1) = 4.71; P= 0.0299 (LDMCTX + LDMCPB vs vehicle). 