Resumen

SALDARRIAGA RIVERA, Lina María; DELGADO QUIROZ, Luis Alberto  y  RIOS GOMES BICA, Blanca Elena. Undifferentiated connective tissue disease associated with deficiency of IgG2 and IgG4. Rev Cuba Reumatol [online]. 2014, vol.16, n.1, pp. 0-0. ISSN 1817-5996.

The undifferentiated connective tissue disease is a condition of unknown etiology that shares clinical, pathological and laboratory characteristics with several collagenases, without meeting the criteria of the American College of Rheumatology 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.

Palabras clave : connective tissue disease; IgG deficiency; autoimmune disease; immunodeficiency.

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