Abstract
Common variable immunodeficiency disorders (CVID) are a heterogeneous group of conditions with hypogammaglobulinemia as the common denominator. These are the most common symptomatic primary immunodeficiency disorder in adults. Two different clinical forms are described: one group only develops infections, while a second includes (sometimes without infections, at least at the onset of disease course) a variety of non-infectious autoimmune, inflammatory, granulomatous and/or lymphoproliferative manifestations, sometimes revealing the disease and often observed in Internal Medicine. The international diagnostic criteria for CVID were updated in 2016 and are the subject of several comments in this general review. The recent use of new sequencing techniques makes it possible to better genetically define CVID. The identification of such a genetic disease makes it possible to treat pathophysiologically, in particular autoimmune and lymphoproliferative complications, with targeted treatments, sometimes used in other diseases. Determining a genetic disease in these patients also makes it possible to provide appropriate genetic counseling, and therefore to monitor mutated individuals, symptomatic or not.
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