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Related Experiment Videos

Natural killer cell neoplasms.

Xiayuan Liang1, Douglas K Graham

  • 1Department of Pathology, Children's Hospital, Denver, Colorado, USA. liang.xiayuan@tchden.org

Cancer
|February 21, 2008
PubMed
Summary
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Natural killer (NK) cell tumors are rare and diverse. This review covers clinicopathologic features, pathogenesis, genetics, diagnosis, and treatment of NK cell neoplasms, including mature and immature subtypes.

Area of Science:

  • Hematology
  • Oncology
  • Immunology

Background:

  • Natural killer (NK) cell tumors are uncommon and heterogeneous.
  • The World Health Organization classifies mature NK cell neoplasms into extranodal NK cell lymphoma, nasal type, and aggressive NK cell leukemia.
  • These tumors are prevalent in Asia and Central/South America, often associated with Epstein-Barr virus (EBV).

Purpose of the Study:

  • To review recent concepts and progress in the clinicopathologic features, pathogenesis, genetic characteristics, diagnosis, differential diagnosis, treatment, and outcomes of all subtypes of NK cell neoplasms.
  • To clarify the classification and understanding of mature and immature NK cell tumors.
  • To provide a comprehensive overview for clinicians and researchers.

Main Methods:

Related Experiment Videos

  • Review of recent literature on NK cell neoplasms.
  • Analysis of clinicopathologic features, including immunophenotype (CD2+, CD3-, CD56+) and genetic aberrations (e.g., 6q, 11q, 13q, 17p loss).
  • Discussion of differential diagnosis, including CD4+/CD56+ hematodermic neoplasm and true immature NK cell tumors.

    • Main Results:

    • Mature NK cell tumors exhibit polymorphic infiltrate, angioinvasion, and EBV association.
    • Immature NK cell tumors (CD4-/CD56+) show a blastic appearance and lack EBV, suggesting a distinct origin.
    • Genetic aberrations like chromosome 6q, 11q, 13q, and 17p loss are recurrent in NK cell neoplasms.

    Conclusions:

    • NK cell neoplasms encompass a spectrum of mature and immature subtypes with distinct features.
    • Accurate diagnosis relies on integrated clinicopathologic, immunophenotypic, and genetic analysis.
    • Further research is needed to improve understanding and treatment strategies for these rare tumors.