<unk>  is a type of immune disorder characterized by a reduction in some types of gamma globulins, resulting in heightened susceptibility to some infectious diseases where primary immunity is antibody based. It is distinguished from hypogammaglobulinemia, which is a reduction in all types of gamma globulins. Hyper IgM syndrome can be considered a form of<unk> , because it results from a failure of transformation from IgM production to production of other antibodies, and so the condition can be interpreted as a reduction of the other types.
Dysgammaglobulinemia
Hypogammaglobulinemia
Hypergammaglobulinemia
Thymic hypoplasia
Monocytopenia
IgG deficiency
T cell deficiency
Lymphocytopenia