Related Experiment Videos
Chronic natural killer cell lymphocytosis
1Division of Hematology and Internal Medicine, Mayo Clinic, Rochester, Minnesota 55905, USA.
Leukemia & Lymphoma
|January 1, 1996
Summary
Chronic Natural Killer (NK) cell lymphocytosis (CNKL) often presents with severe cytopenias or vasculitis, responding to immunosuppression. This nonprogressive condition mirrors the indolent course of T-LGL leukemia.
Area of Science:
- Hematology
- Immunology
- Oncology
Background:
- Chronic proliferations of Natural Killer (NK) cells (CD3- CD16+) are identified via large granular lymphocyte (LGL) excess and flow cytometry.
- T-cell large granular lymphocyte (T-LGL) leukemia is a related indolent disorder associated with neutropenia and rheumatoid arthritis.
Purpose of the Study:
- To describe the clinical presentation and long-term outcomes of patients diagnosed with chronic NK cell lymphocytosis (CNKL).
Main Methods:
- Retrospective analysis of 14 patients with CNKL.
- Median follow-up of 4 years.
- Clinical data including presentation, treatment response, and disease course were reviewed.
Main Results:
- The majority of patients presented with severe cytopenias or vasculitic syndromes.
- Immunosuppressive therapy was effective in managing these manifestations.
- Other symptoms included fever and arthralgias.
- The disease course was generally nonprogressive.
Conclusions:
- Chronic NK cell lymphocytosis (CNKL) typically presents with significant cytopenias or vasculitis, often responsive to immunosuppressive treatment.
- CNKL shares a similar nonprogressive, indolent clinical course with T-LGL leukemia.