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Selective immunoglobulin A deficiency - Selective immunoglobulin A deficiency is classified as an IgA level below 7mg/dl (0.4375 μmol/L) with normal levels of other immunoglobulins. Some people with selective immunoglobulin A deficiency are prone to infections and develop other autoimmune disorders such as lupus, celiac disease and inflammatory bowel disease while others are completely asymptomatic. •
Selective IgE deficiency disease - Selective IgE deficiency disease is characterized by IgE levels below <2 kIU/L with normal levels of other immunoglobulins. Selective IgE deficiency disease may be associated with an increased predisposition to certain sinopulmonary diseases, autoimmune disorders, infections, and malignancies. •
IgG deficiency - IgG deficiency is a lack of IgG in the absence of other immunoglobulin deficiencies. IgG levels of 300–600 mg/dL show a mild to moderate reduction of IgG while levels below 200 mg/dl are classified as a severe deficiency. Those with IgG deficiency often get chronic or reoccurring pyogenic respiratory tract infections. •
Isolated primary immunoglobulin M deficiency - Isolated primary immunoglobulin M deficiency is classified as IgM levels under two SD of mean with normal levels of other immunoglobulins. Isolated primary immunoglobulin M deficiency often presents as recurring infections. Patients often improve with immunoglobulin therapy. ==See also==