TP53 and neoplasm: To quantitatively assess cell dispersal, we calculated the mean distance between different green or red cells in tissue sections of lung adenomas from K-MADM-p53 mice at 10-16 weeks p.i. Although labelled cells of the same colour were separated by an average of ∼8.7 cell diameters (range 2.47–27.76, n=31 tumours), p53KO/KO cells surprisingly exhibited significantly decreased dispersal than p53WT/WT cells (7.2 versus 10.2 cell diameters, P=0.013, two-tailed paired Student's t-test).