[Expression of A, B, and H antigens on erythrocytes of patients with leukemia].

The level of ABO(H) antigen expression was estimated on erythrocytes isolated from the peripheral blood of 94 leukemia patients. The control group included 1014 blood donors. It was found that the level of H antigen expression was lowered in all forms of leukemia, while the levels of A and B antigen expression were unchanged. It has been suggested that the lowering of H antigen expression level is a pathogenetic sign of the leukemic process, and its value could be used for the control of the disease course character.