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Common variable immunodeficiency disorders: division into distinct clinical phenotypes.

Helen Chapel1, Mary Lucas, Martin Lee

  • 1Department of Clinical Immunology, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom. helen.chapel@ndm.ox.ac.uk

Blood
|March 6, 2008
PubMed
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Common Variable Immunodeficiency Disorders (CVID) phenotypes vary widely. This largest CVID cohort shows distinct phenotypes, reduced mortality over time, and specific predictors for lymphoid malignancy, highlighting the need for international registries.

Area of Science:

  • Immunology
  • Clinical Medicine
  • Epidemiology

Background:

  • Common Variable Immunodeficiency Disorders (CVID) are primary immunodeficiencies characterized by hypogammaglobulinemia.
  • Understanding CVID phenotypes and their clinical impact is crucial for patient management.
  • Previous studies have been limited by small sample sizes and short follow-up periods.

Purpose of the Study:

  • To define distinct clinical phenotypes in a large European CVID cohort.
  • To analyze mortality trends and identify predictors of survival.
  • To investigate the heterogeneity of CVID and identify predictive markers for specific clinical outcomes.

Main Methods:

  • Retrospective analysis of data from 334 CVID patients across 7 European centers.
  • Longitudinal follow-up for an average of 25.6 years (9461 patient-years).

Related Experiment Videos

  • Phenotypic classification, mortality analysis, and investigation of clinical and immunological predictors.

    • Main Results:

    • Five distinct clinical phenotypes were identified: no complications, autoimmunity, polyclonal lymphocytic infiltration, enteropathy, and lymphoid malignancy.
    • Mortality has significantly decreased in the last 15 years.
    • Polyclonal lymphocytic infiltration was associated with a 5-fold increased risk of lymphoid malignancy.
    • Serum IgM levels and circulating CD8 proportions were predictive markers for specific phenotypes.

    Conclusions:

    • CVID is a heterogeneous condition with distinct clinical phenotypes and varying survival times.
    • International registries are essential for comprehensive CVID research due to significant inter-country variations.
    • Early identification of predictive markers like polyclonal lymphocytic infiltration can improve risk stratification and patient outcomes.