Rheumatologic and autoimmune manifestations in primary immune deficiencyKitcharoensakkul, Maleewana,b; Cooper, Megan A.aCurrent Opinion in Allergy and Clinical Immunology: December 2019 - Volume 19 - Issue 6 - p 545–552 doi: 10.1097/ACI.0000000000000583 PRIMARY IMMUNE DEFICIENCY DISEASE: Edited by Stephen Jolles and M. Teresa (Maite) de la Morena Buy Abstract Author InformationAuthors Article MetricsMetrics Purpose of review Here we review the rheumatologic and autoimmune features of primary immune deficiencies with a focus on recently recognized genetic diseases, the spectrum of autoimmunity in PID, and targeted therapies. Recent findings Primary immune deficiencies (PIDs) were initially described as genetic diseases of the immune system leading to susceptibility to infection. It is now well recognized that immune dysfunction and dysregulation also cause noninfectious complications including autoimmunity. The increased application of molecular testing for PID has revealed the diversity of clinical disease. Recent discoveries of diseases with prominent autoimmunity include activated phosphoinositide 3-kinase δ syndrome and PIDs caused by gain-of-function in STAT1 and STAT3. Similarly, identification of larger cohorts of patients with molecular diagnoses in more common PIDs, such as common variable immune deficiency (CVID), has led to increased understanding of the range of autoimmunity in PIDs. Understanding the molecular basis of these PIDs has the potential to lead to targeted therapy to treat associated autoimmunity. Summary Autoimmunity and rheumatologic disease can be presenting symptoms and/or complicating features of primary immunodeficiencies. Evaluation for PIDs in patients who have early-onset, multiple, and/or atypical autoimmunity can enhance diagnosis and therapeutic options. aDivision of Rheumatology bDivision of Allergy, Immunology & Pulmonary Medicine, Department of Pediatrics, Washington University School of Medicine, St, Louis, Missouri, USA Correspondence to Megan A. Cooper, Division of Rheumatology, Department of Pediatrics, Washington University School of Medicine, St, Louis, Missouri, USA. Tel: +1 314 454 6124; e-mail: firstname.lastname@example.org Copyright © 2019 Wolters Kluwer Health, Inc. All rights reserved.