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Progression of selective IgA deficiency to common variable immunodeficiency in a 16 year old boy
J Litzman1, M Burianova, V Thon
1Dept. Clin. Immunology, Masaryk University, Faculty Hospital, Brno, Czech.
Insights
Selective IgA deficiency can progress to common variable immunodeficiency (CVID). This case report details a 16-year-old boy whose IgA deficiency evolved into CVID, highlighting the link between these immune disorders.
Area of Science:
- Immunology
- Clinical Medicine
Background:
- Selective IgA deficiency is the most common primary immunodeficiency.
- Progression to Common Variable Immunodeficiency (CVID) is a recognized but infrequently reported phenomenon.
Purpose of the Study:
- To describe a case of selective IgA deficiency progressing to CVID.
- To support the hypothesis of a close relationship between selective IgA deficiency and CVID.
Main Methods:
- Case report of a 16-year-old male patient.
- Analysis of immunoglobulin levels (IgA, IgG, IgM).
- Lymphocyte subpopulation analysis (CD4+, CD8+, CD3+, CD19+, CD16+/56+).
Main Results:
- The patient presented with severe pleuropneumonia and low IgA, normal IgG/IgM.
- Lymphocyte analysis showed decreased CD4+ and increased CD8+ T-cells.
- Over 17 months, IgG, IgA, and IgM levels progressively decreased, indicating CVID development.
Conclusions:
- Selective IgA deficiency may represent an early stage of CVID.
- This case underscores the importance of monitoring IgA-deficient patients for potential progression to CVID.
Abstract:
A case report of a 16 year old boy in whom selective IgA deficiency progressed to typical common variable immunodeficiency (CVID) is described. This boy with a history of frequent but not severe respiratory tract infections was referred to hospital because of severe pleuropneumonia and decreased levels of IgA (0.23 g/L), but normal IgG and IgM levels. Lymphocyte subpopulation determination revealed a decreased proportion of CD4+ lymphocytes (30%) and an increased proportion of CD8+ lymphocytes (32%), while CD3+, CD19+ and CD16+/56+ subpopulations were normal. During the subsequent 17 months a gradual decrease in IgG (ultimate level 2.23 g/L), IgA (< 0.05 g/L) and IgM (< 0.05 g/L) levels was observed, the decrease in IgM being the slowest reflecting a constant heavy chain gene order on chromosome 14. The observation supports the thesis of a close relation of selective IgA deficiency and common variable immunodeficiency.