APC and neoplasm: However, interindividual variability in the level of cytokine secretion was high, irrespective of the presence or absence of a macroscopic tumor (Supplemental Figure 7 and Table 6); 31% (4/13) of tumor-free Apc+/Min-FCCC mice and 31% (4/13) of tumor-bearing Apc+/Min-FCCC mice were defined as outliers due to high expression of one or more cytokines (Table 6).