CEACAM5 and colorectal cancer: As mouse models of human cancer, we chose LS174T and SW1222 tumours: two colorectal cancer models, which have previously been extensively studied using monoclonal antibodies specific to the carcinoembryonic antigen (El Emir et al, 2007a; Fidarova et al, 2008) and with the vascular-targeting anti-EDB antibody L19 (El-Emir et al, 2007b).