[Clinical patterns of selective IgA deficiency: 3 case reports].

The selective deficit of IgA is characterised by its clinical variability. This disease can be detected in non-symptomatic patients or associated to multiple diseases of different features. The allergic reactions, recurrent infections, gastrointestinal alterations, autoimmune diseases, and some neoplasias are the most frequent features of this deficit. We present 3 cases with different pathology associated to the common deficit of IgA, giving a view of the wide clinical spectrum of this process.