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Published on: October 19, 2014
Large Granular Lymphocytes and Large Granular Lymphocytic Leukemia: A Real-World Case-Control Study
Chenxi Liu1,2, Yan Liu1,2, Yishuang Li1,2
1State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, P. R. China.
Summary
Peripheral blood smear examination effectively screens for large granular lymphocyte leukemia (LGLL). A threshold of 24% large granular lymphocytes (LGLs) aids in LGLL patient identification.
Area of Science:
- Hematology
- Oncology
Background:
- Large granular lymphocyte leukemia (LGLL) is a rare clonal lymphoproliferative disorder.
- Accurate diagnosis relies on identifying increased large granular lymphocytes (LGLs) in peripheral blood.
Purpose of the Study:
- To compare LGL counts in healthy donors versus LGLL patients.
- To evaluate peripheral blood smear sensitivity for LGLL diagnosis.
Main Methods:
- Retrospective analysis of 391 healthy donors and 53 LGLL patients.
- Comparison of peripheral blood smear and flow cytometry results.
- Receiver Operating Characteristic (ROC) curve analysis to determine diagnostic thresholds.
Main Results:
- Significant differences in LGL proportion and absolute count between healthy donors and LGLL patients (P<0.001).
- Peripheral blood smear and flow cytometry showed comparable diagnostic performance.
- A 24% LGL proportion was identified as a cutoff value for LGLL screening.
Conclusions:
- Peripheral blood smear examination is a valuable tool for initial LGLL screening.
- Established thresholds (0.5×10⁹/L LGL absolute count and 24% LGL proportion) can effectively screen LGLL patients.
