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This review has concentrated on clinical syndromes for which a congenital basis of polymorphonuclear neutrophil dysfunction has been identified. The first clinical syndrome found to be associated with dysfunctional polymorphs was chronic granulomatous disease of childhood. Identification of a
X-linked lymphoproliferative disease (XLP) is an inherited immunodeficiency characterized by extreme vulnerability to Epstein-Barr virus (EBV) infection, resulting in fatal infectious mononucleosis, dysgammaglobulinemia and malignant lymphoma. Recently, mutations in the SH2D1A gene, which encodes
X-linked agammaglobulinemia, a B cell immunodeficiency, is caused by mutations in the Bruton's tyrosine kinase (Btk) gene. The absence of a functional Btk protein leads to a failure of B cell differentiation and antibody production. B cell receptor stimulation leads to the phosphorylation of the Btk