[Immunophenotyping in diagnostic and classification of leukemia]

Markers of differentiation on cell membrane are recognized by monoclonal antibodies, capable to define more precisely the level of cell maturation. The immunofluorescent method, used in this work, is based on the discoveration of surface molecules by means of fluorescein labeled monoclonal antibodies. 74 patients with leukemia, 11 children and 63 adults persons, have been examined. The results show that malignant cells express certain markers characteristic for some forms of leukemias. The most common marker expression in pre-B ALL was: CD34, CD10, CD22, CD24, CD19 and DR. Expression of CD10 marker was characteristic for CALLA + pre-B ALL cells. T leukemias expressed CD38, CD2, CD3, CD4 and CD8 markers. The expression of CD36, CD13, CD14, CD15, CD11b and DR markers was seen in AML. Surface markers may determine type of leikemia. Immunophenotyping of leukemias has enabled us to make a precise diagnostic, determine its prognosis, and select appropriate therapeutic approach.