Abstract
The direct leucocyte migration inhibition test in capillary tubes was used to test 10 patients with colonic adenocarcinoma against KCl soluble extracts of an allogenic colon cancer and an allogenic normal colon fragment. Inhibition was consistently found with the cancer extract but not with the normal tissue extract. None of the control group of patients affected by other tumors, intestinal and liver disorders showed a migration inhibition in response to the colonic tumor extract. Our findings strongly suggest the presence of a tumor-associated antigen in the cancer extract.
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