Novel variant of common variable immunodeficiency

A 57-year-old woman with frequent respiratory infections was initially diagnosed with IgG subclass deficiency based on low levels of IgG subclasses 2 and 3. Three years later, she progressed to having IgA deficiency as well. With a normal total IgG level, she does not meet criteria for common variable immunodeficiency (CVID). This may represent a variant of CVID. This also highlights the importance of immunoglobulin subclass estimation in patients where immunodeficiency is suspected clinically. She is being treated with rotational antibiotics the first 10 days of every month, monthly intravenous immunoglobulin (IVIG) infusion and osteopathic manipulation one to two times per month. On this regimen, although she has had several viral respiratory infections, she has avoided further hospitalisation for more than 1 year.

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