IgA Deficiency Is Not Systematically Ruled Out in Patients Undergoing Celiac Disease Testing.

Background: Guidelines for celiac disease (CD) testing recommend total serum IgA determination alongside anti-transglutaminase IgA antibodies. It is not well known if lack of serum IgA determination is a common finding in clinical practice.

Aim: To determine the prevalence of lack of serum IgA determination among patients screened for celiac disease.