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Immunoglobulin concentrations in untreated lymphoblastic leukemia
1Department of Paediatrics, University of Sheffield, Children's Hospital, United Kingdom.
Pediatric Hematology and Oncology
|November 1, 1995
Summary
Low immunoglobulin levels at diagnosis may indicate a poorer prognosis for children with acute lymphoblastic leukemia (ALL). This is particularly true for patients with lower white blood cell counts or specific B-cell ALL subtypes, suggesting a link to adverse outcomes.
Area of Science:
- Pediatric Oncology
- Immunology
Background:
- Early research suggested low immunoglobulin (Ig) levels at diagnosis correlate with worse outcomes in pediatric acute lymphoblastic leukemia (ALL).
- Modern therapeutic advancements and detailed immunophenotypic subtyping necessitate a re-evaluation of this association.
Purpose of the Study:
- To investigate the prognostic significance of immunoglobulin concentrations at diagnosis in children with ALL.
- To determine if low Ig levels predict outcomes in specific immunophenotypic subtypes and risk groups.
Main Methods:
- Retrospective analysis of Ig, IgA, and IgM concentrations at diagnosis in 199 children with ALL.
- Correlation of Ig levels with immunophenotype, white blood cell count, and disease-free survival (DFS).
Main Results:
- Abnormal Ig values were observed in 29% of patients, with no clear link to immunophenotype.
- Overall DFS did not differ significantly between patients with normal and abnormal Ig values.
- Patients with low Ig counts and either low white blood cell count (<20 x 10(9)/L) or CD10+ B-precursor ALL exhibited significantly inferior 5-year DFS (56% vs 83% and 55% vs 77%, respectively).
Conclusions:
- Minor Ig abnormalities are common in children with ALL, irrespective of immunologic subtype.
- Low immunoglobulin concentrations may identify a subset of patients with otherwise favorable risk factors who are at higher risk for relapse or treatment failure.