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Immunophenotypically Defined Mixed-Phenotype Acute Leukemias: A Clinicopathologic Analysis of 52 Cases
Bo Zhang1, Olga K Weinberg1, Weina Chen1
1Division of Hematopathology, Department of Pathology The University of Texas Southwestern Medical Center Dallas Texas USA.
Ejhaem
|January 20, 2026
Summary
Mixed-phenotype acute leukemias (MPAL) are rare hematologic malignancies. Treatment type, lineage, and age impact outcomes, suggesting personalized approaches for MPAL patients.
Area of Science:
- Hematology
- Oncology
- Immunophenotyping
Background:
- Mixed-phenotype acute leukemias (MPAL) are rare and present diagnostic and therapeutic challenges.
- Understanding their clinicopathologic characteristics and outcomes is crucial.
Purpose of the Study:
- To explore the clinicopathologic features of immunophenotypically defined MPAL.
- To investigate the oncological outcomes associated with MPAL subtypes and treatments.
Main Methods:
- Retrospective analysis of 52 patients with immunophenotypically defined MPAL.
- Review of medical records and diagnostic pathology data.
Main Results:
- The cohort was predominantly B/myeloid (80.8%).
- Acute lymphoblastic leukemia (ALL)-directed chemotherapy, pediatric population, and biphenotypic type correlated with higher complete remission rates.
- ALL-directed chemotherapy, pediatric population, and B-MPAL subtypes were associated with significantly better overall survival.
Conclusions:
- Immunophenotypically defined MPALs are distinct entities with diverse immunophenotypes.
- Treatment, lineage, and age are key predictors of clinical outcomes.
- Future research should integrate immunophenotypic and molecular data for improved classification and treatment.
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