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[Quantitative behavior of eosinophil granulocytes in the bone marrow of children with acute lymphoblastic leukemia]
Insights
Eosinophil granulocytes in children with acute lymphoblastic leukemia (ALL) initially decrease with chemotherapy, then normalize during remission. Relapses cause further significant eosinophil reduction, indicating disease progression.
Area of Science:
- Hematology
- Pediatric Oncology
Background:
- Acute lymphoblastic leukemia (ALL) is a common childhood cancer.
- Eosinophils play a role in immune responses and can be affected by cancer therapies.
Purpose of the Study:
- To investigate the quantitative behavior of eosinophil granulocytes in children with ALL during disease course and treatment.
- To correlate eosinophil levels with treatment response, remission, and relapse.
Main Methods:
- Quantitative analysis of eosinophil granulocytes in 31 children with ALL.
- Monitoring eosinophil levels during chemotherapy (Memphis IV protocol), remission, and relapse phases.
Main Results:
- Eosinophils initially decreased during chemotherapy, then increased to normal levels during remission.
- Significant eosinophil decrease was observed during relapse and pre-final stages.
- Bone marrow eosinophil counts showed greater diminution with each subsequent relapse, affecting maturation.
Conclusions:
- Eosinophil granulocyte behavior is a potential indicator of ALL progression and treatment response.
- The findings suggest a link between eosinophils, neutrophilic granulocytes, and the lymphocytic system in ALL.
Abstract:
Of 31 children affected with acute lymphoblastic leukaemia the quantitative behaviour of eosinophilie granulocytes was examined in the course of the disease. Nearly all patients were treated according to a chemotherapy scheme (Memphis IV). During this therapy the eosinophils greatly diminished initially increased significantly to subnormal values and to the values of healthy persons with persisting full remission. Another significant decrease occurred during the relapse and in the pre-final stage. During each following relapse a greater diminution of bone-marrow eosinophils could be observed. Simultaneously the decrease of eosinophils led to a shift in the degree of maturation. In this connection the similar behaviour of neutrophilic and eosinophilic granulocytes of the bone-marrow must be stressed. Eventually, the lbast excrescence in the bone-marrow and its therapy cannot solely be decisive for the findings made. Relations to the lymphocytic system can be referred to.