Korosteleva T A, Mel'nikov R A, Belokhvostova A T
Vopr Onkol. 1976;22(5):28-32.
The results of study of an unusual antigen containing carcinogenic triptophan metabolite - 3-oxyanthranilic acid as a haptene (3-OAA-antigen) in blood serum of patients with colonic and rectal tumors indicated that it is present in the majority of patients with histologically proved cancer of the large intestine in different stages, as well as in some patients with polyps of the large intestine. 3-OAA-antigen is found to be absent in blood serum of healthy donors.
