Hypogammaglobulinemia: Causes, Types, and Increased Infection Susceptibility

Hypogammaglobulinemia is characterized by abnormally low gamma globulin (antibody) levels, increasing infection susceptibility. It can be:

  • Primary (congenital/hereditary): Genetic disorders like X-linked agammaglobulinemia, common variable immunodeficiency (CVID) → impaired B-cell antibody production; presents in childhood with recurrent infections.
  • Secondary (acquired): Due to medications, malignancies, protein loss, etc.

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