[Immunologic study of tumors of the human thyroid gland].

The presence of specific antigens was shown in 6 of 17 cases of human thyroid carcinoma by the complement fixation test. These antigens were absent in the tissues obtained from healthy man and embryo. Immunological variants of these antigens were found in some patients. The specificity of the antigen determinants of the thyroid tumours is apparently determined by the substances of the protein origin.