IL10 and neoplasm: A significant decrease in IL‐10 expression was observed in the brains of Py230 cell‐inoculated mice that developed tumours (CANTumor; p = 0.024) or whose primary tumour regressed (CANRegress; p = 0.028) in comparison to control mice (one‐way ANOVA, F(7, 42) = 6.884, p = 0.0001, Figure 5C).