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Lymphocytopenia preceding chronic lymphocytic leukemia
Acta Medica Scandinavica
|January 1, 1980
Summary
Pre-diagnosis low T-cell counts may precede chronic lymphocytic leukemia (CLL). This suggests a T-lymphocyte deficiency might promote the B-cell proliferation seen in CLL development.
Area of Science:
- Hematology
- Immunology
- Oncology
Background:
- Chronic lymphocytic leukemia (CLL) is a malignancy of mature B-lymphocytes.
- The preleukemic phase of CLL is not well understood.
- Peripheral blood lymphocyte counts can be monitored over extended periods.
Purpose of the Study:
- To investigate lymphocyte counts in patients prior to CLL diagnosis.
- To explore potential preleukemic changes in lymphocyte subsets.
Main Methods:
- Retrospective analysis of WBC and differential counts in 11 CLL patients.
- Comparison of prediagnostic lymphocyte counts with a sex- and age-matched control group.
- Assessment of serum immunoglobulin levels in patients with preleukemic lymphocytopenia.
Main Results:
- Patients diagnosed with CLL showed significantly lower median lymphocyte counts in the preleukemic period (1.3 x 10^9/l) compared to controls.
- Prediagnostic lymphocytopenia was observed in 11 CLL patients, with counts recorded up to 5 years before diagnosis.
- Three patients exhibited lymphocytopenia alongside normal serum immunoglobulin levels during the preleukemic phase.
Conclusions:
- Prediagnostic lymphocytopenia, potentially linked to reduced T-cell numbers, may precede CLL development.
- A deficiency in T-lymphocytes could create an environment conducive to the malignant proliferation of B-cells characteristic of CLL.
- These findings suggest T-cell dysregulation as a potential factor in CLL pathogenesis.