[The expression of leukocytic and related antigens on the cells of human breast cancer cells].

Certain expression regularities of different markers in human breast cancer cells are demonstrated. Monomorphic determinants of HLA class II antigen are detected only in case of HLA class I expression and cancer-embryonal antigen (CEA); the latter is combined with HLA class I and ICO-84 antigens at a significantly higher rate. The expression effect of CEA and HLA-DR on the metastatic spreading rate of regional lymph nodes is marked. A heterogeneity of the single tumour and in patients with malignant breast cancer is determined by the presence of the "leucocytic" antigens and CEA. In parallel studies monoclonal antibodies (MAB) HMFG-1 and a common epithelial antigen are assayed. The antigen interacting with MAB HEA-125 is characterized by the monomorphic expression.