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Study of diagnostic and prognostic parameters (including flow cytometry) in chronic lymphoproliferative disorders:
Narender Kumar1, Neelam Varma, Subhash Varma
1Department of Hematology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
Insights
This study assessed chronic lymphoproliferative disorders (CLPD) in India using advanced methods. Flow cytometry (FCM) proved valuable for diagnosing CLPD, establishing crucial baseline data for future research.
Area of Science:
- Hematology
- Oncology
- Immunology
Background:
- Chronic lymphoproliferative disorders (CLPD) require comprehensive diagnostic and prognostic assessment.
- India has seen increasing adoption of advanced diagnostic techniques like flow cytometry (FCM).
Purpose of the Study:
- To evaluate CLPD using diverse parameters including morphology, immunophenotyping, and molecular/cytogenetic analyses.
- To establish baseline data for CLPD assessment in India using novel techniques.
Main Methods:
- Prospective analysis of peripheral blood and bone marrow (BM) aspirate morphology.
- Lymphoid cell flow cytometry (FCM) and BM infiltration pattern analysis.
- Comparison of findings with Rai and Binet staging, CD38 positivity, LDH, lymphocyte doubling time, and Coomb's test.
Main Results:
- Chronic lymphocytic leukemia (CLL) and hairy cell leukemia (HCL) were the most frequent CLPDs (70 CLL, 14 HCL).
- Immunophenotyping confirmed diagnoses in most CLL and HCL cases.
- Bone marrow infiltration patterns significantly correlated with staging systems.
Conclusions:
- Flow cytometry (FCM) offers significant advantages for CLPD diagnosis and is increasingly utilized in India.
- This study provides essential baseline data for CLPD diagnostics in the Indian setting.
Objective:
To assess for chronic lymphoproliferative disorders (CLPD) using several diagnostic and prognostic parameters, including cell morphology, immunologic markers and molecular and cytogenetic investigations, some of which had not been used in the assessment of patients in India.
Study Design:
This prospective study involved the analysis of peripheral blood and bone marrow (BM) aspirate morphology, BM infiltration pattern and lymphoid cell flow cytometry (FCM) in patients with CLPDs. These findings were compared with other disease parameters.
Results:
Chronic lymphocytic leukemia (CLL) and hairy cell leukemia (HCL) were the most commonly encountered CLPDs among 91 CLPD patients. Seventy cases were diagnosed as CLL, 14 as HCL and 7 as miscellaneous. Sixty-nine CLL cases showed typical CLL immunophenotype. Thirteen HCL cases revealed typical HCL immunophenotype. Rai and Binet staging systems were applied, and the correlation of various stages with other prognostic parameters like BM trephine biopsy patterns, CD38 positivity, serum lactic dehydrogenase level, lymphocyte doubling time and Coomb's test was analyzed. BM infiltration pattern showed significant statistical correlation with staging systems.
Conclusion:
The advantage of FCM is being realized increasingly in India, therefore this study is likely to serve as a baseline data in our set-up.
