The lung in inborn errors of immunity.

The lungs are integral to immune defense, and inborn errors of immunity (IEI) often manifest as lung disease. Lung complications of IEI can involve the airways, alveolar spaces, interstitium, vasculature, and pleura. Accurate identification of these lung disease patterns requires a thorough clinical history, physical examination, and high-resolution computed tomography (HRCT), as lung imaging patterns guide further respiratory and immunological evaluations. Respiratory assessment may also include pulmonary function tests, bronchoscopy with bronchoalveolar lavage, and, in some cases, lung biopsy. Additionally, molecular diagnosis of underlying immune defects, typically through comprehensive clinical phenotyping, functional immune studies, and genetic testing, is crucial for informing patient management and guiding targeted therapies. Importantly, given the complexity of IEI, a multidisciplinary approach is necessary. Furthermore, ongoing research is required to refine therapies and improve outcomes for lung complications.

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