Revista alergia Mexico (Tecamachalco, Puebla, Mexico : 1993)
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Primary immunodeficiencies (PID) are characterized by alteration of the components of the immune system. Humoral deficiencies represent 50%. The most common are selective IgA deficiency, Bruton agammaglobulinemia, and common variable immunodeficiency (CVID). ⋯ Unlike reports in the literature, in the study group, CVID was the most common cause of humoral PID, predominantly in men; the most common gastrointestinal disorder was intestinal functional disorder.