Gastrointestinal Presentations of Common Variable Immunodeficiency: Hiding in Plain Sight.

Primary immunodeficiency disorders typically have an onset in childhood. The suspicion for these conditions usually arises from a history of recurrent respiratory, gastrointestinal, or cutaneous infections with a history often dating back to infancy or early childhood. However, adults can also be affected. Common variable immunodeficiency, which usually has an onset/diagnosis in adulthood, is the most common symptomatic primary immunodeficiency. However, as its presentation could be manifold, its diagnosis is often delayed. The gastrointestinal tract is the second most affected system after the respiratory tract; symptoms associated with the gastrointestinal tract are often intractable. As patients with common variable immunodeficiency are often misdiagnosed, a high index of suspicion and clinical correlation is required for the appropriate diagnosis of this potentially debilitating condition.