Male patient with less than 2% CD19+ B cells and at least one of the following:
Male patient with less than 2% CD19+ B cells in whom all of the following are positive:
Male patient with less than 2% CD 19+ B cells in whom other causes of hypogammaglobulinemia have been excluded (see Table) and at least one of the following is positive:
Most patients with XLA develop recurrent bacterial infections, particularly otitis, sinusitis and pneumonia, in the first two years of life. The most common organisms are S. pneumonea and H. influenzae. The serum IgG is usually less than 200 mg/dl (2g/L) and the IgG and IgA are generally less than 20 mg/dl (0.2g/L). Approximately 20% of patients present with a dramatic, overwhelming infection, often with neutropenia. Another 10-15% have higher concentrations of serum immunoglobulin than expected or are not recognized to have immunodeficiency until after 5 years of age.
All other causes of hypogammaglobulinemia listed in Table: