[IgG2 deficiency associated with recurrent pneumonia and asthma (review of an IgG subclass)]

Very low levels of IgG2 were detected in a 7 1/2 years old girl affected by recurrent pneumonias and atopic related disease. A similar clinical picture was present in two siblings (of 9 and 4 years old), although their of IgG subclass deficiencies is made, with special emphasis on IgG2 and their relationship with recurrent sinopulmonary infections, atopy and other immunodeficiencies.