(CVID) is the most frequent primary immunodeficiency, characterized by reduced levels of immunoglobulins [1,2]. Due to a heterogeneous presentation including a heightened rate of infections, the diagnosis is often delayed for 4–9 years. This delay may contribute to the increased morbidityandmortality in CVIDpatients [1,3]. Gastrointestinal manifestations – most often chronic diarrhea [2] – are ...