Undifferentiated connective tissue disease associated with deficiency of IgG2 and IgG4
Keywords:
connective tissue disease, IgG deficiency, autoimmune disease, immunodeficiencyAbstract
The undifferentiated connective tissue disease is a condition of unknown etiology that shares clinical, pathological and laboratory characteristics with several collagenosis, without meeting the criteria of the American College of Rheumatology (ACR) for the diagnosis of a specific rheumatic disease. The IgG subclass deficiency term refers to a significant decrease in serum concentrations of one or more IgG subclasses in a patient whose total IgG concentration is normal, presenting recurrent bronchitis, sinusitis or otitis. We report the case of a female patient diagnosed with undifferentiated connective tissue disease associated with deficiency of IgG2 and IgG4.Downloads
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