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Published on: October 17, 2025
Immunophenotyping of Acute Lymphoblastic Leukemia
Joseph A DiGiuseppe1, Jolene L Cardinali2
1Department of Pathology and Laboratory Medicine, Hartford Hospital, Hartford, CT, USA. joseph.digiuseppe@hhchealth.org.
Insights
Flow cytometry immunophenotyping aids in diagnosing acute lymphoblastic leukemia and detecting minimal residual disease. This method guides personalized treatment by identifying rare leukemic cells post-therapy.
Area of Science:
- Hematology
- Immunology
- Clinical Diagnostics
Background:
- Immunophenotyping by flow cytometry is crucial for diagnosing acute lymphoblastic leukemia (ALL).
- Detecting minimal residual disease (MRD) post-therapy is a significant prognostic factor for ALL patients.
- Accurate immunophenotypic analysis guides individualized treatment strategies.
Purpose of the Study:
- To detail laboratory methods for immunophenotyping in acute lymphoblastic leukemia.
- To describe techniques for characterizing lymphoblasts at diagnosis.
- To outline procedures for detecting minimal residual disease after ALL treatment.
Main Methods:
- Utilizing flow cytometry for immunophenotypic analysis of peripheral blood and bone marrow samples.
- Employing specific antibody combinations for cell-surface and intracellular protein labeling.
- Implementing standardized procedures for sample preparation and data analysis.
Main Results:
- Established antibody panels for reliable diagnosis of ALL.
- Developed sensitive methods for detecting rare leukemic lymphoblasts, indicating MRD.
- Provided a framework for analyzing complex immunophenotypic data.
Conclusions:
- Laboratory methods for immunophenotyping are essential for ALL diagnosis and MRD detection.
- Accurate MRD assessment via flow cytometry enables personalized treatment adjustments.
- These standardized techniques improve the management and prognosis of acute lymphoblastic leukemia patients.
Abstract:
Immunophenotyping by flow cytometry is an important component in the diagnostic evaluation of patients with acute lymphoblastic leukemia. This technique further permits the detection of minimal residual disease after therapy, a robust prognostic factor that may guide individualized treatment. We describe here laboratory methods for both the initial characterization of lymphoblasts at diagnosis, and the detection of rare leukemic lymphoblasts after treatment. In addition to antibody combinations suitable for diagnosis and detection of minimal residual disease, we describe procedures for peripheral blood and bone marrow sample preparation, procedures for labeling of cell-surface and intracellular proteins with fluorochrome-conjugated antibodies, and approaches to analysis of immunophenotypic data.
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