Relationship of tumour size with mucin phenotypes and histological grades of tumours in stable, intermediate, and unstable clusters. Each coloured square, representing a sample, was plotted two dimensionally according to increasing tumour size and tumour grade. Light yellow background indicates that samples were not actively collected in these category areas. The numerals on the right side and bottom margins are the total sample number in each line and column, respectively. Regarding G, GI, I and N, see the legend for Figure 3. Regarding Cm and Cd, see the legend for Table 1.