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Segura-Tudela A, López-Nevado M, Nieto-López C, García-Jiménez S, Díaz-Madroñero MJ, Delgado Á, Cabrera-Marante O, Pleguezuelo D, Morales P, Paz-Artal E, Gil-Niño J, Marco FM, Serrano C, González-Granado LI, Quesada-Espinosa JF, Allende LM. Enrichment of Immune Dysregulation Disorders in Adult Patients with Human Inborn Errors of Immunity. J Clin Immunol 2024; 44:61. [PMID: 38363452 PMCID: PMC10873437 DOI: 10.1007/s10875-024-01664-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 01/26/2024] [Indexed: 02/17/2024]
Abstract
Human inborn errors of immunity (IEI) comprise a group of diseases resulting from molecular variants that compromise innate and adaptive immunity. Clinical features of IEI patients are dominated by susceptibility to a spectrum of infectious diseases, as well as autoimmune, autoinflammatory, allergic, and malignant phenotypes that usually appear in childhood, which is when the diagnosis is typically made. However, some IEI patients are identified in adulthood due to symptomatic delay of the disease or other reasons that prevent the request for a molecular study. The application of next-generation sequencing (NGS) as a diagnostic technique has given rise to an ever-increasing identification of IEI-monogenic causes, thus improving the diagnostic yield and facilitating the possibility of personalized treatment. This work was a retrospective study of 173 adults with IEI suspicion that were sequenced between 2005 and 2023. Sanger, targeted gene-panel, and whole exome sequencing were used for molecular diagnosis. Disease-causing variants were identified in 44 of 173 (25.43%) patients. The clinical phenotype of these 44 patients was mostly related to infection susceptibility (63.64%). An enrichment of immune dysregulation diseases was found when cohorts with molecular diagnosis were compared to those without. Immune dysregulation disorders, group 4 from the International Union of Immunological Societies Expert Committee (IUIS), were the most prevalent among these adult patients. Immune dysregulation as a new item in the Jeffrey Model Foundation warning signs for adults significantly increases the sensitivity for the identification of patients with an IEI-producing molecular defect.
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Affiliation(s)
- Alejandro Segura-Tudela
- Department of Immunology, University Hospital, 12 de Octubre, Avda. de Andalucía S/N, 28041, Madrid, Spain
- Research Institute Hospital, 12 Octubre (imas12), Madrid, Spain
| | - Marta López-Nevado
- Department of Immunology, University Hospital, 12 de Octubre, Avda. de Andalucía S/N, 28041, Madrid, Spain
- Research Institute Hospital, 12 Octubre (imas12), Madrid, Spain
| | - Celia Nieto-López
- Department of Immunology, University Hospital, 12 de Octubre, Avda. de Andalucía S/N, 28041, Madrid, Spain
- Research Institute Hospital, 12 Octubre (imas12), Madrid, Spain
| | - Sandra García-Jiménez
- Department of Immunology, University Hospital, 12 de Octubre, Avda. de Andalucía S/N, 28041, Madrid, Spain
- Research Institute Hospital, 12 Octubre (imas12), Madrid, Spain
| | - María J Díaz-Madroñero
- Department of Immunology, University Hospital, 12 de Octubre, Avda. de Andalucía S/N, 28041, Madrid, Spain
| | - Ángeles Delgado
- Department of Immunology, University Hospital, 12 de Octubre, Avda. de Andalucía S/N, 28041, Madrid, Spain
| | - Oscar Cabrera-Marante
- Department of Immunology, University Hospital, 12 de Octubre, Avda. de Andalucía S/N, 28041, Madrid, Spain
- Research Institute Hospital, 12 Octubre (imas12), Madrid, Spain
| | - Daniel Pleguezuelo
- Department of Immunology, University Hospital, 12 de Octubre, Avda. de Andalucía S/N, 28041, Madrid, Spain
- Research Institute Hospital, 12 Octubre (imas12), Madrid, Spain
| | - Pablo Morales
- Department of Immunology, University Hospital, 12 de Octubre, Avda. de Andalucía S/N, 28041, Madrid, Spain
- Research Institute Hospital, 12 Octubre (imas12), Madrid, Spain
| | - Estela Paz-Artal
- Department of Immunology, University Hospital, 12 de Octubre, Avda. de Andalucía S/N, 28041, Madrid, Spain
- Research Institute Hospital, 12 Octubre (imas12), Madrid, Spain
- School of Medicine, Complutense University of Madrid, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain
| | - Jorge Gil-Niño
- Department of Internal Medicine, University Hospital, 12 de Octubre, Madrid, Spain
| | - Francisco M Marco
- Unit of Immunology, University Hospital General Dr Balmis, Alicante, Spain
| | - Cristina Serrano
- Department of Immunology, University Hospital Fundación Jiménez Díaz, Madrid, Spain
| | - Luis I González-Granado
- Research Institute Hospital, 12 Octubre (imas12), Madrid, Spain
- School of Medicine, Complutense University of Madrid, Madrid, Spain
- Unit of Immunodeficiencies, Department of Pediatrics, University Hospital, 12 de Octubre, Madrid, Spain
| | - Juan F Quesada-Espinosa
- Research Institute Hospital, 12 Octubre (imas12), Madrid, Spain
- Department of Genetics, University Hospital, 12 de Octubre, Madrid, Spain
| | - Luis M Allende
- Department of Immunology, University Hospital, 12 de Octubre, Avda. de Andalucía S/N, 28041, Madrid, Spain.
- Research Institute Hospital, 12 Octubre (imas12), Madrid, Spain.
- School of Medicine, Complutense University of Madrid, Madrid, Spain.
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Coppola E, Sgrulletti M, Cortesi M, Romano R, Cirillo E, Giardino G, Dotta L, Cancrini C, Bruzzese D, Badolato R, Moschese V, Pignata C. The Inborn Errors of Immunity-Virtual Consultation System Platform in Service for the Italian Primary Immunodeficiency Network: Results from the Validation Phase. J Clin Immunol 2024; 44:47. [PMID: 38231401 PMCID: PMC10794402 DOI: 10.1007/s10875-023-01644-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 12/17/2023] [Indexed: 01/18/2024]
Abstract
PURPOSE Inborn errors of immunity (IEI) represent a heterogeneous group of rare genetically determined diseases. In some cases, patients present with complex or atypical phenotypes, not fulfilling the accepted diagnostic criteria for IEI and, thus, at high risk of misdiagnosis or diagnostic delay. This study aimed to validate a platform that, through the opinion of immunologist experts, improves the diagnostic process and the level of care of patients with atypical/complex IEI. METHODS Here, we describe the functioning of the IEI-Virtual Consultation System (VCS), an innovative platform created by the Italian Immunodeficiency Network (IPINet). RESULTS In the validation phase, from January 2020 to June 2021, 68 cases were entered on the IEI-VCS platform. A final diagnosis was achieved in 35/68 cases (51%, 95% CI 38.7 to 64.2). In 22 out of 35 solved cases, the diagnosis was confirmed by genetic analysis. In 3/35 cases, a diagnosis of secondary immunodeficiency was made. In the remaining 10 cases, an unequivocal clinical and immunological diagnosis was obtained, even though not substantiated by genetic analysis. CONCLUSION From our preliminary study, the VCS represents an innovative and useful system to improve the diagnostic process of patients with complex unsolved IEI disorders, with benefits both in terms of reduction of time of diagnosis and access to the required therapies. These results may help the functioning of other international platforms for the management of complex cases.
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Affiliation(s)
- Emma Coppola
- Section of Pediatrics, Department of Translational Medical Sciences, Federico II University, Via S. Pansini, 5-80131, Naples, Italy
| | - Mayla Sgrulletti
- Pediatric Immunopathology and Allergology Unit, Policlinico Tor Vergata, University of Tor Vergata, Rome, Italy
- PhD Program in Immunology, Molecular Medicine and Applied Biotechnology, University of Rome Tor Vergata, Rome, Italy
| | - Manuela Cortesi
- Pediatrics Clinic and Institute for Molecular Medicine A. Nocivelli, Department of Clinical and Experimental Sciences, ASST- Spedali Civili of Brescia, University of Brescia, Brescia, Italy
| | - Roberta Romano
- Section of Pediatrics, Department of Translational Medical Sciences, Federico II University, Via S. Pansini, 5-80131, Naples, Italy
| | - Emilia Cirillo
- Section of Pediatrics, Department of Translational Medical Sciences, Federico II University, Via S. Pansini, 5-80131, Naples, Italy
| | - Giuliana Giardino
- Section of Pediatrics, Department of Translational Medical Sciences, Federico II University, Via S. Pansini, 5-80131, Naples, Italy
| | - Laura Dotta
- Pediatrics Clinic and Institute for Molecular Medicine A. Nocivelli, Department of Clinical and Experimental Sciences, ASST- Spedali Civili of Brescia, University of Brescia, Brescia, Italy
| | - Caterina Cancrini
- Research Unit of Primary Immunodeficiency, IRCCS Bambin Gesù Children Hospital, Rome, Italy
| | - Dario Bruzzese
- Department of Public Health, Federico II University, Naples, Italy
| | - Raffaele Badolato
- Pediatrics Clinic and Institute for Molecular Medicine A. Nocivelli, Department of Clinical and Experimental Sciences, ASST- Spedali Civili of Brescia, University of Brescia, Brescia, Italy
| | - Viviana Moschese
- Pediatric Immunopathology and Allergology Unit, Policlinico Tor Vergata, University of Tor Vergata, Rome, Italy
| | - Claudio Pignata
- Section of Pediatrics, Department of Translational Medical Sciences, Federico II University, Via S. Pansini, 5-80131, Naples, Italy.
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Jiang D, Rosenlind K, Baxter S, Gernsheimer T, Gulsuner S, Allenspach EJ, Keel SB. Evaluating the prevalence of inborn errors of immunity in adults with chronic immune thrombocytopenia or Evans syndrome. Blood Adv 2023; 7:7202-7208. [PMID: 37792884 PMCID: PMC10702780 DOI: 10.1182/bloodadvances.2023011042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 08/15/2023] [Accepted: 08/15/2023] [Indexed: 10/06/2023] Open
Abstract
Inborn errors of immunity (IEIs) are monogenic disorders that predispose patients to immune dysregulation, autoimmunity, and infection. Autoimmune cytopenias, such as immune thrombocytopenia (ITP) and Evans syndrome (a combination of ITP and autoimmune hemolytic anemia), are increasingly recognized phenotypes of IEI. Although recent findings suggest that IEIs may commonly underlie pediatric ITP and Evans syndrome, its prevalence in adult patients with these disorders remains undefined. This study sought to estimate the prevalence of underlying IEIs among adults with persistent or chronic ITP or Evans syndrome using a next-generation sequencing panel encompassing >370 genes implicated in IEIs. Forty-four subjects were enrolled from an outpatient adult hematology clinic at a tertiary referral center in the United States, with a median age of 49 years (range, 20-83). Fourteen subjects (31.8%) had secondary ITP, including 8 (18.2%) with Evans syndrome. No cases of IEI were identified despite a high representation of subjects with a personal history of autoimmunity (45.5%) and early onset of disease (median age at diagnosis of 40 years [range, 2-77]), including 20.5% who were initially diagnosed as children. Eight subjects (18.2%) were found to be carriers of pathogenic IEI variants, which, in their heterozygous state, are not disease-causing. One case of TUBB1-related congenital thrombocytopenia was identified. Although systematic screening for IEI has been proposed for pediatric patients with Evans syndrome, findings from this real-world study suggest that inclusion of genetic testing for IEI in the routine work-up of adults with ITP and Evans syndrome has a low diagnostic yield.
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MESH Headings
- Humans
- Adult
- Child
- Young Adult
- Middle Aged
- Aged
- Aged, 80 and over
- Child, Preschool
- Adolescent
- Anemia, Hemolytic, Autoimmune/epidemiology
- Anemia, Hemolytic, Autoimmune/genetics
- Anemia, Hemolytic, Autoimmune/complications
- Purpura, Thrombocytopenic, Idiopathic/epidemiology
- Purpura, Thrombocytopenic, Idiopathic/genetics
- Purpura, Thrombocytopenic, Idiopathic/complications
- Autoimmunity
- Prevalence
- Thrombocytopenia/epidemiology
- Thrombocytopenia/genetics
- Thrombocytopenia/complications
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Affiliation(s)
- Debbie Jiang
- Division of Hematology, University of Washington, Seattle, WA
- Fred Hutchinson Cancer Center, Seattle, WA
- Division of Hematology, Massachusetts General Hospital, Boston, MA
| | | | - Sarah Baxter
- Division of Rheumatology, Seattle Children’s Hospital, Seattle, WA
| | - Terry Gernsheimer
- Division of Hematology, University of Washington, Seattle, WA
- Fred Hutchinson Cancer Center, Seattle, WA
| | | | | | - Siobán B. Keel
- Division of Hematology, University of Washington, Seattle, WA
- Fred Hutchinson Cancer Center, Seattle, WA
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Yanes T, Sullivan A, Barbaro P, Brion K, Hollway G, Peake J, McNaughton P. Evaluation and pilot testing of a multidisciplinary model of care to mainstream genomic testing for paediatric inborn errors of immunity. Eur J Hum Genet 2023; 31:1125-1132. [PMID: 36864115 PMCID: PMC10545723 DOI: 10.1038/s41431-023-01321-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 02/01/2023] [Accepted: 02/13/2023] [Indexed: 03/04/2023] Open
Abstract
Molecular diagnosis of paediatric inborn errors of immunity (IEI) influences management decisions and alters clinical outcomes, through early use of targeted and curative therapies. The increasing demand for genetic services has resulted in growing waitlists and delayed access to vital genomic testing. To address this issue, the Queensland Paediatric Immunology and Allergy Service, Australia, developed and evaluated a mainstreaming model of care to support point-of-care genomic testing for paediatric IEI. Key features of the model of care included a genetic counsellor embedded in the department, state-wide multidisciplinary team meetings, and variant prioritisation meetings to review whole exome sequencing (WES) data. Of the 62 children presented at the MDT, 43 proceeded to WES, of which nine (21%) received a confirmed molecular diagnosis. Changes to treatment and management were reported for all children with a positive result, including curative hematopoietic stem cell transplantation (n = 4). Four children were also referred for further investigations of variants of uncertain significance or additional testing due to ongoing suspicion of genetic cause after negative result. Demonstrating engagement with the model of care, 45% of the patients were from regional areas and on average, 14 healthcare providers attended the state-wide multidisciplinary team meetings. Parents demonstrated understanding of the implications of testing, reported minimal decisional regret post-test, and identified benefits to genomic testing. Overall, our program demonstrated the feasibility of a mainstreaming model of care for paediatric IEI, improved access to genomic testing, facilitated treatment decision-making, and was acceptable to parents and clinicians alike.
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Affiliation(s)
- Tatiane Yanes
- Queensland Paediatric Immunology and Allergy Service, Children's Health Queensland, Brisbane, QLD, 4101, Australia.
- The Frazer Institute, Dermatology Research Centre, The University of Queensland, Brisbane, QLD, 4102, Australia.
| | - Anna Sullivan
- Queensland Paediatric Immunology and Allergy Service, Children's Health Queensland, Brisbane, QLD, 4101, Australia
| | - Pasquale Barbaro
- Queensland Paediatric Haematology Service, Queensland Children's Hospital, Brisbane, QLD, 4101, Australia
- Queensland Children's Hospital Laboratory, Pathology Queensland, South Brisbane, QLD, 4101, Australia
| | - Kristian Brion
- Department of Molecular Genetics, Pathology Queensland, Royal Brisbane and Women's Hospital, Brisbane, QLD, 4029, Australia
| | - Georgina Hollway
- Department of Molecular Genetics, Pathology Queensland, Royal Brisbane and Women's Hospital, Brisbane, QLD, 4029, Australia
| | - Jane Peake
- Queensland Paediatric Immunology and Allergy Service, Children's Health Queensland, Brisbane, QLD, 4101, Australia
- Department of Paediatrics and Child Health, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Peter McNaughton
- Queensland Paediatric Immunology and Allergy Service, Children's Health Queensland, Brisbane, QLD, 4101, Australia
- Department of Paediatrics and Child Health, The University of Queensland, Brisbane, QLD, 4072, Australia
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Ouimet F, Fortin J, Bogossian A, Padley N, Chapdelaine H, Racine E. Transitioning from pediatric to adult healthcare with an inborn error of immunity: a qualitative study of the lived experience of youths and their families. Front Immunol 2023; 14:1211524. [PMID: 37600793 PMCID: PMC10432858 DOI: 10.3389/fimmu.2023.1211524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 06/27/2023] [Indexed: 08/22/2023] Open
Abstract
Introduction Transition from pediatric to adult healthcare is a multifaceted and consequential process with important health implications for youth. Although research on transition has grown significantly, research on transition for patients living with an inborn error of immunity (IEI) is scarce. We undertook a qualitative study to better understand the perspectives of youths and parents in an outpatient immunology clinic. Methdos Semi-structured interviews were conducted with 9 youths, 6 parents and 5 clinicians, all recruited from the same clinic. All youths recently transferred to adult care with or without an established diagnosis of IEI. Interviews were transcribed verbatim and thematic analysis was conducted. Two sets of themes were generated. The first set captured the positive and negative aspects experienced during transition, as well as recommendations to facilitate the process. The second set focused on key topics discussed in the interviews that were merged into overarching themes. Results Perspectives of participants were clustered into 6 overarching themes: (1) lack of knowledge about IEIs; (2) scattered transitions; (3) changing healthcare teams; (4) approaching an unknown environment; (5) transitioning to adulthood; (6) assuming responsibility for the management of the condition. Overall, the challenges encountered with respect to these themes had profound clinical and humanistic implications for patients such as generating significant distress. Discussion We discuss the unique challenges of the youths in our study in comparison to common problems reported by youths with chronic illness in the broader transition literature (for example: the change of healthcare team, the lack of information about the transition process and navigating the adult care system, growth towards self-management and the co-occurring developmental transition to adulthood). There is an urgency to attend to the specific problems created by the rarity of IEIs and related lack of knowledge about them as well as the need for multidisciplinary cross-clinic care during transition and beyond.
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Affiliation(s)
- François Ouimet
- Pragmatic Health Ethics Research Unit, Institut de recherches cliniques de Montréal, Montréal, QC, Canada
| | - Justine Fortin
- Pragmatic Health Ethics Research Unit, Institut de recherches cliniques de Montréal, Montréal, QC, Canada
| | - Aline Bogossian
- Pragmatic Health Ethics Research Unit, Institut de recherches cliniques de Montréal, Montréal, QC, Canada
- École de travail social, Faculté des arts et des sciences, Université de Montréal, Montréal, QC, Canada
| | - Nicole Padley
- Pragmatic Health Ethics Research Unit, Institut de recherches cliniques de Montréal, Montréal, QC, Canada
| | - Hugo Chapdelaine
- Pragmatic Health Ethics Research Unit, Institut de recherches cliniques de Montréal, Montréal, QC, Canada
- Faculté de médecine, Université de Montréal, Montréal, QC, Canada
| | - Eric Racine
- Pragmatic Health Ethics Research Unit, Institut de recherches cliniques de Montréal, Montréal, QC, Canada
- Faculté de médecine, Université de Montréal, Montréal, QC, Canada
- Département de médecine et Département de médecine sociale et préventive, Université de Montréal, Montréal, QC, Canada
- Division of Experimental Medicine, McGill University, Montréal, QC, Canada
- Department of Neurology and Neurosurgery, McGill University, Montréal, QC, Canada
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Walter JE, Ziegler JB, Ballow M, Cunningham-Rundles C. Advances and Challenges of the Decade: The Ever-Changing Clinical and Genetic Landscape of Immunodeficiency. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2023; 11:107-115. [PMID: 36610755 DOI: 10.1016/j.jaip.2022.11.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 11/15/2022] [Accepted: 11/15/2022] [Indexed: 01/06/2023]
Abstract
In the past 10 years, we have witnessed major advances in clinical immunology. Newborn screening for severe combined immunodeficiency has become universal in the United States and screening programs are being extended to severe combined immunodeficiency and other inborn errors of immunity globally. Early genetic testing is becoming the norm for many of our patients and allows for informed selection of targeted therapies including biologics repurposed from other specialties. During the COVID-19 pandemic, our understanding of essential immune responses expanded and the discovery of immune gene defects continued. Immunoglobulin products, the backbone of protection for antibody deficiency syndromes, came into use to minimize side effects. New polyclonal and monoclonal antibody products emerged with increasing options to manage respiratory viral agents such as SARS-CoV-2 and respiratory syncytial virus. Against these advances, we still face major challenges. Atypical is becoming typical as phenotypes of distinct genetic disease overlap whereas the clinical spectrum of the same genetic defect widens. Therefore, clinical judgment needs to be paired with repeated deep immune phenotyping and upfront genetic testing, as technologies rapidly evolve, and clinical disease often progresses with age. Managing patients with organ damage resulting from immune dysregulation poses a special major clinical challenge and management often lacks standardization, from autoimmune cytopenias, granulomatous interstitial lung disease, enteropathy, and liver disease to endocrine, rheumatologic, and neurologic complications. Clinical, translational, and basic science networks will continue to advance the field; however, cross-talk and education with practicing allergists/immunologists are essential to keep up with the ever-changing clinical and genetic landscape of inborn errors of immunity.
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Affiliation(s)
- Jolan E Walter
- Division of Pediatric Allergy and Immunology, University of South Florida at Johns Hopkins All Children's Hospital, St Petersburg, Fla; Division of Allergy and Immunology, Massachusetts General Hospital for Children, Boston, Mass.
| | - John B Ziegler
- School of Women's and Children's Health, UNSW Sydney, Sydney, New South Wales, Australia; Department of Immunology and Infectious Diseases, Sydney Children's Hospital, Randwick, New South Wales, Australia
| | - Mark Ballow
- Department of Pediatrics, Division of Allergy and Immunology, University of South Florida at Johns Hopkins All Children's Hospital, St Petersburg, Fla
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Challenges in and ideas for diagnosing primary immunodeficiencies in Uganda. Curr Opin Pediatr 2022; 34:595-599. [PMID: 36165606 DOI: 10.1097/mop.0000000000001182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
PURPOSE OF REVIEW Primary immunodeficiencies (PIDs) lately referred to as inborn errors of immunity, are consequences of mutations that affect the immune integrity and function. Globally, severe PIDs are more common in infants and are fatal if not timely - appropriately diagnosed and managed. PID programmes and policies vary from country to country. The purpose of this review is to highlight PIDs initiatives and activities in Uganda with a focus on challenges and ideas for diagnosis. RECENT FINDINGS It is now established that appropriate PID diagnosis leads to best treatment options for quality of life for the patients. However, there are still global disparities with these great milestones. PID awareness remains a fundamental global challenge. Autoimmune cytopenia, haemogram and peripheral blood film may be critical PIDs diagnostic markers and tests, respectively, for low-income countries. SUMMARY As awareness is a master key to appropriate PID diagnosis and management, there is a need to design multidisciplinary and sustainable strategies. Complete blood counts and immunoglobulin profile tests may be less expensive alternatives for early diagnosis of PIDs in Uganda and other low-income countries.
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