Common variable immunodeficiency with autoimmunity (CVID with autoimmunity) (related)

Common variable immunodeficiency is a primary immune deficiency in which the body makes too few protective antibodies, arising from impaired antibody production linked to defects in B-cell development and, often, accompanying abnormalities in T-cell regulation, leaving a person more prone to infections. In a notable share of people with CVID, this same underlying immune dysregulation also allows the immune system to turn against the body's own tissue, producing autoimmune features, which is why it is marked here as autoimmune-related.

Research describes autoimmunity as occurring in up to 30 percent of people with CVID, making it an increasingly recognized cause of illness beyond the recurrent infections that typically bring the condition to attention. The most common autoimmune manifestations are cytopenias, meaning immune-driven destruction of blood cells, including immune thrombocytopenia, hemolytic anemia, and neutropenia, alongside organ-specific inflammation that can involve the gut, skin, joints, or lungs. Frequent or stubborn infections, especially of the sinuses and lungs, remain the most typical presenting feature, often with digestive problems and at times enlarged lymph nodes or spleen.

Common signs

Lung inflammation called granulomatous-lymphocytic interstitial lung disease can develop, causing a persistent cough, breathlessness, or reduced exercise tolerance, sometimes before recurrent infections are even recognized as the underlying cause. Autoimmune attacks on blood cells, joint pain, or skin rashes can also occur, and some people are diagnosed with an autoimmune condition years before low antibody levels are found.

This is a plain-language summary for orientation, not a diagnosis. Mechanisms are described as current understanding, not settled fact. Work with your own clinician for your care.