[Forssman antigen in cancerous and normal human tissues]

By reactions of complement fixation, hemolysis and specific adsorption it was found that the heterogenous Forssman antigen is not contained in erythrocytes of normal human tissues and tumors. In the sera of healthy individuals as well as in those with cancer and benign tumors and in rabbit sera there were found complement-fixating antibodies and hemolysins being specific with regard to sheep erythrocytes (Forssman's antigen). There was noted a decreased level of heterophilic Forssman antibodies in the sera of females with malignant and benign genital tumors compared with healthy ones.