Flow-cytometric immunophenotyping of acute leukaemia
1Department of Clinical Laboratory Diagnostics, Zagreb University School of Medicine and Clinical Center, Croatia, Yugoslavia.
Insights
Monoclonal antibodies and flow cytometry enhance acute leukemia diagnosis by analyzing cell markers. This immunophenotyping approach improved diagnostic accuracy in 95.6% of adult acute leukemia patients.
Area of Science:
- Hematology
- Immunology
- Oncology
Background:
- Monoclonal antibodies (Mo.Abs.) have advanced immunological distinctions in acute leukemias (AL).
- Flow cytometry offers objective, sensitive cell-marker analysis with high statistical significance due to large cell numbers.
- Multiparameter analysis enables the study of heterogeneous cell populations.
Purpose of the Study:
- To investigate the expression of leukocyte differentiation antigens in adult patients with acute leukemia.
- To evaluate the diagnostic utility of combining monoclonal antibodies and flow cytometry for acute leukemia classification.
Main Methods:
- Utilized a wide panel of commercially available monoclonal antibodies.
- Employed flow-cytometric analysis for objective and sensitive cell-marker detection.
- Analyzed a cohort of 90 adult patients diagnosed with acute leukemia.
Main Results:
- Monoclonal antibody panel established diagnosis unequivocally in 90% of cases.
- Four cases (4.4%) exhibited unusual mixed phenotypes.
- Combined immunophenotyping with cytological/cytochemical data achieved a 95.6% diagnostic rate.
- 4.4% of cases remained unclassified.
Conclusions:
- The combined approach of monoclonal antibodies and flow cytometry is highly effective for diagnosing acute leukemia.
- Immunophenotyping provides crucial data for classifying acute leukemias, including identification of mixed phenotypes.
- Integration with traditional methods enhances diagnostic precision, though a small percentage may remain challenging to classify.
Abstract:
A wide panel of commercially available monoclonal antibodies (Mo.Abs.) has substantially improved immunological distinguishing of various types of acute leukaemias (AL), whereas the flow-cytometric approach allows a more objective and sensitive cell-marker analysis; combined with high numbers of cells analyzed, it yields data of high statistical significance. In addition, multiparameter analysis offers the possibility of studying heterogenous cell populations. Both technical advancements were used to study the expression of leukocyte differentiation antigens in 90 adult patients with AL. With the panel of Mo.Abs. used, the diagnosis was unequivocally established in 90% of cases; four of them (4.4% of the total) expressed unusual (mixed) phenotype. When combined with cytological/cytochemical data, the diagnosis was established in 95.6% of cases, whereas 4.4% of all cases remained unclassified.
