[Unexplained remission of common variable immunodeficiency: analysis of a clinical case]

We report a 26 years old female with a common variable immunodeficiency diagnosed at the age of 21, with recurrent pulmonary and sinusal bacterial infections, that had a clinical and laboratory remission. At the moment of diagnosis, she had agammaglobulinemia in the protein electrophoresis, very low level of IgG and IgM and absence of IgA. Absolute counts of CD4(+) T lymphocytes were low and CD8(+) were normal. B lymphocyte count was normal. Five years later, a repeated study revealed normal levels of all these parameters, excepting IgA that continued to be undetectable. We propose that the remission could be due to a decrease in suppressor activity of T lymphocytes. There is no documented evidence of infectious factors or the use of immunological therapy that could have influenced the course of the disease.