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CD56 (NCAM)-positive malignant lymphoma

K F Wong1, J K Chan, C S Ng

  • 1Department of Pathology, Queen Elizabeth Hospital, Hong Kong.

Leukemia & Lymphoma
|June 1, 1994
PubMed
Summary
This summary is machine-generated.

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CD56-positive lymphomas are aggressive cancers affecting middle-aged adults, often presenting with skin rash and enlarged organs. These lymphomas can be further classified into T-cell and natural killer cell subtypes.

Area of Science:

  • Oncology
  • Immunology
  • Hematology

Background:

  • CD56, a marker for natural killer (NK) cells and reactive with neuronal-cell adhesion molecule (NCAM), identifies a distinct group of lymphomas.
  • These lymphomas present unique clinicopathologic features, differing from typical lymphoid malignancies.

Purpose of the Study:

  • To characterize the clinicopathologic, immunologic, and cytologic features of CD56-positive lymphomas.
  • To differentiate between CD56-positive T-cell and NK-cell lymphoma subtypes.

Main Methods:

  • Analysis of patient demographics, clinical presentation, and extranodal involvement.
  • Histologic examination of Giemsa-stained cytologic preparations.
  • Immunophenotypic analysis (CD56, CD3) and T-cell receptor gene rearrangement studies.

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Main Results:

  • The disease predominantly affects middle-aged adults, often presenting with fever, skin rash, and hepatosplenomegaly without peripheral lymphadenopathy.
  • Extranodal involvement is common, particularly in the skin, aerodigestive tract, and central nervous system.
  • An angiocentric and angiodestructive pattern is frequently observed histologically; cytoplasmic granules are common in Giemsa stains.
  • CD56-positive lymphomas are subclassified into CD3-positive (T-cell) and CD3-negative (NK-cell) subtypes, with T-cell receptor gene rearrangement present only in the former.
  • CD56-positive lymphomas are aggressive neoplasms.

Conclusions:

  • CD56-positive lymphomas represent an aggressive group of neoplasms with characteristic clinical and pathological findings.
  • Immunophenotypic classification into T-cell and NK-cell subtypes is crucial for understanding these lymphomas.
  • The distinct features highlight the importance of CD56 as a diagnostic marker in lymphoma.