Low %CD19 (6%; RV: 8-45*).Absent IgA with low IgG (36 mg/dL; RV: 345-1213**) and normal IgM.Moderately reduced proliferation assays.Poor growth and weight gain, facial dysmorphism, dysplastic mitral valve and aortic valve insufficiency, delayed teeth eruption, autoimmune hypothyroidism, atrophic gastritis, recurrent infections, hearing loss. The gene discussed is CD40LG; the disease is Recurrent infections.