a rat large bowel carcinoma model has been established with close similarities to the immunological features of the corresponding human neoplasms as far as those are presently known : ( 1 ) common antigens with tissue-type specificity , ( 2 ) expression of immunogenic gut-specific embryonal antigens , ( 3 ) cell-mediated immunity present in tumor bearers , whose sera are capable of blocking the lymphocyte effect specifically , and ( 4 ) rapid disappearance of the serum blocking activity after tumor excision .
C0003320
antigens
C0020966
cell-mediated