CEACAM5 and colon adenocarcinoma: These findings are similar to other studies demonstrating 40% complete anti-tumor responses by 8Gy tumor irradiation given in conjunction with a complex vaccine encoding for CEA as an antigen, for co-stimulatory molecules and GM-CSF in MC38-CEA transfected colon adenocarcinoma in CEA transgenic C57BL/6 mice [42].