PECAM1 and neoplasm: For LNCaP tumours, no significant difference was seen between rim and core (n=5 sections, 0.181±0.010 vs. 0.201±0.013; p=0.22) but LNCaP tumours showed significantly higher ASMA/CD31 than PC3 tumours (0.184±0.010 vs. 0.132±0.011, p=0.0004).