PECAM1 and neoplasm: In 4T1+ASA/Cl group, the number of PAS-positive and CD31-negative pseudovessels in primary tumours was higher compared to control 4T1 mice (69310±35033 pixels for 4T1 mice vs 139608±58524 pixels for 4T1+ASA/Cl mice, n=9-10, P=0.005) (Figure 3A-3F), compatible with vascular mimicry (VM) in the primary tumours induced by ASA+Cl treatment, with no difference in the number of PAS-positive and CD31-positive endothelium-lined vessels (Figure 3A-3D and 3G).