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[NK-cell lymphomas and NK-like T-cell lymphomas]
1Department of Hematology, Juntendo University School of Medicine.
Nihon Rinsho. Japanese Journal of Clinical Medicine
|March 31, 2000
Summary
This study details two types of natural killer (NK)-cell lymphomas: nasal and blastic. It outlines their distinct morphological, immunophenotypic, and clinical characteristics for better diagnosis.
Area of Science:
- Hematology
- Oncology
- Immunology
Context:
- Natural killer (NK)-cell lymphomas are rare lymphoid malignancies.
- Two primary types, nasal and blastic NK-cell lymphomas, have been described.
- NK-like T-cell lymphomas represent a distinct entity.
Purpose:
- To delineate the distinct characteristics of nasal NK-cell lymphoma and blastic NK-cell lymphoma.
- To describe the phenotype and clinical course of these aggressive lymphomas.
- To differentiate NK-like T-cell lymphomas from other NK-cell neoplasms.
Summary:
- Nasal NK-cell lymphoma presents extranodally with large granular lymphocyte (LGL) morphology and an aggressive course (CD2+CD3-CD16-/+CD56+CD57-).
- Blastic NK-cell lymphoma, a rare subtype, often affects the skin, shows lymphoblastic morphology, and has a poor prognosis (CD2-/+CD3-CD4+/-CD16-CD56+CD57-).
- NK-like T-cell lymphomas exhibit extranodal LGL morphology and aggressive behavior (CD3+CD4-CD8+CD16+/-CD56+CD57-).
Impact:
- Provides clear diagnostic criteria for differentiating rare NK-cell lymphomas.
- Enhances understanding of the clinical behavior and prognosis of these aggressive malignancies.
- Aids in the accurate classification and treatment planning for patients with NK-cell lymphomas.