Lymphomas, B-Cell - B-Cell Lymphomas
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Algorithm(s)
PDF algorithm(s) available at www.arupconsult.com.
Leukemia and Lymphoma Phenotyping Algorithm

Clinical Background

B-cell non-Hodgkin lymphomas (NHL) represent a heterogenous group of malignancies of the lymphoid system.

Epidemiology

  • Incidence -90% of the 755,000 cases of NHL diagnosed yearly
  • Age - 60s
  • Sex - slight predominance of males

Classification

  • Mature B-Cell Neoplasms (WHO classification)
    • Diffuse large B-cell lymphoma - 30-40% of NHL
    • Follicular lymphoma - 20-25% of NHL
    • B-cell chronic lymphocytic leukemia; small lymphocytic lymphoma
    • Plasma cell myeloma - plasmacytoma
    • Mantle cell lymphoma - 6-8% of NHL
    • Splenic marginal zone B-cell lymphoma - rare
    • Lymphoplasmacytic lymphoma - rare
    • Hairy cell leukemia - rare
    • Extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT) type - 8-10% of NHL
    • Nodal marginal zone lymphoma (+/- monocytoid B-cells)
    • Primary effusion lymphoma - rare
    • Burkitt's lymphoma - rare

Risk Factors

  • Presence of autoimmune diseases or iatrogenic or acquired immune deficiency
    • Sjögren syndrome
    • Celiac disease
    • Rheumatoid arthritis
    • Post-transplant immunosuppression
    • Immunosuppressive drugs
    • HIV infection
  • Inherited disorders
    • Chédiak-Higashi syndrome
    • Common variable immune deficiency (CVID)
    • Wiskott-Aldrich syndrome
  • Chronic infection
    • Epstein-Barr virus - primary CNS diffuse large B-cell lymphoma
    • Helicobacter pylori - gastric mucosa-associated lymphoid tissue (MALT) lymphoma
    • Hepatitis C - lymphoplasmacytic lymphoma
    • HHV8 - primary effusion lymphomas

Clinical Presentation

  • Nonspecific fever, fatigue, weight loss
  • Lymphadenopathy (peripheral)
    • Sometimes bulky
  • Extranodal disease
    • Commonly in GI tract and bone marrow
See Also
  Epstein-Barr Virus - EBV

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