Inborn errors of immunity associated with elevated immunoglobulin E

Objective: To review the characteristic clinical and laboratory features of inborn errors of immunity (IEI) that are associated with elevated immunoglobulin (Ig)E levels. Data Sources: Primary peer-reviewed literature. Study Selections: Original research articles reviewed include interventional studies, retrospective studies, casecontrol studies, cohort studies, and review articles related to the subject matter. Results: An extensive literature review was completed to allow for comprehensive evaluation of several monogenic IEI. This review includes a description of the classic clinical features, common infections, characteristic laboratory findings, specific diagnostic methods (when applicable), and genetic basis of disease of each syndrome. A comprehensive flow diagram was created to assist them in the diagnosis and evaluation of patients with elevated IgE levels who may require evaluation for an IEI. Conclusion: IEI should be considered in patients with elevated IgE levels, especially if they have recurrent infections, eczematous dermatitis, malignancy, lymphoproliferation, autoimmunity, or connective tissue abnormalities. (c) 2022 American College of Allergy, Asthma & Immunology. Published by Elsevier Inc. All rights reserved.