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Katz G, Hernandez-Barco Y, Palumbo D, Guy TV, Dong L, Perugino CA. Proliferative features of IgG4-related disease. THE LANCET. RHEUMATOLOGY 2024; 6:e481-e492. [PMID: 38574744 DOI: 10.1016/s2665-9913(24)00022-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 01/17/2024] [Accepted: 01/18/2024] [Indexed: 04/06/2024]
Abstract
IgG4-related disease is an immune-mediated disease that can lead to substantial morbidity and organ damage. Capable of affecting nearly any organ system or anatomic site, and showing considerable overlap in clinical presentation with various other diseases, IgG4-related disease often poses a diagnostic challenge for clinicians. Furthermore, there are no diagnostic biomarkers with high specificity for IgG4-related disease, and histopathological examination is nuanced and requires clinical correlation for accurate diagnosis. Therefore, it is crucial for clinicians to recognise the clinical phenotypes of IgG4-related disease. The disease is generally considered to have predominantly fibrotic and proliferative (or inflammatory) manifestations, with distinct clinical, serological and histopathological findings associated with each manifestation. However, the fibrotic and proliferative manifestations of this disease frequently occur together, thereby blurring this dichotomous distinction. In this Series paper, we provide a detailed overview of the clinical manifestations typical of the proliferative features of IgG4-related disease, with an emphasis on the diagnostic evaluation and differential diagnosis of each proliferative disease manifestation. In addition, we summarise the immune mechanisms underlying IgG4-related disease, suggest a framework for how to approach management and monitoring after the diagnosis is established, and highlight current unmet needs for patient care surrounding this disease.
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Affiliation(s)
- Guy Katz
- Rheumatology Unit, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Yasmin Hernandez-Barco
- Pancreatology Unit, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Diego Palumbo
- San Raffaele Scientific Institute, Radiology, Milan, Italy
| | - Thomas V Guy
- Royal Prince Alfred Hospital, Camperdown, NSW, Australia; School of Medical Sciences, The University of Sydney, Camperdown, NSW, Australia; Ragon Institute of Massachusetts Gneral Hospital, Massachusetts Institute of Technology, and Harvard University, Cambridge, MA, USA
| | - Lingli Dong
- Department of Rheumatology and Immunology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Cory A Perugino
- Rheumatology Unit, Massachusetts General Hospital, Boston, MA, USA; Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA.
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Du Y, Ding S, Li C, Bai Y, Wang X, Li D, Xie Y, Fan G, Wu LM, Wang G. Coronary artery wall contrast enhancement imaging impact on disease activity assessment in IgG4-RD: a direct marker of coronary involvement. J Cardiovasc Magn Reson 2024; 26:101047. [PMID: 38825155 PMCID: PMC11268104 DOI: 10.1016/j.jocmr.2024.101047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 04/23/2024] [Accepted: 05/25/2024] [Indexed: 06/04/2024] Open
Abstract
BACKGROUND Coronary artery wall contrast enhancement (CE) has been applied to non-invasive visualization of changes to the coronary artery wall in systemic lupus erythematosus (SLE). This study investigated the feasibility of quantifying CE to detect coronary involvement in IgG4-related disease (IgG4-RD), as well as the influence on disease activity assessment. METHODS A total of 93 subjects (31 IgG4-RD; 29 SLE; 33 controls) were recruited in the study. Coronary artery wall imaging was performed in a 3.0 T MRI scanner. Serological markers and IgG4-RD Responder Index (IgG4-RD-RI) scores were collected for correlation analysis. RESULTS Coronary wall CE was observed in 29 (94 %) IgG4-RD patients and 22 (76 %) SLE patients. Contrast-to-noise ratio (CNR) and total CE area were significantly higher in patient groups compared to controls (CNR: 6.1 ± 2.7 [IgG4-RD] v. 4.2 ± 2.3 [SLE] v. 1.9 ± 1.5 [control], P < 0.001; Total CE area: 3.0 [3.0-6.6] v. 1.7 [1.5-2.6] v. 0.3 [0.3-0.9], P < 0.001). In the IgG4-RD group, CNR and total CE area were correlated with the RI (CNR: r = 0.55, P = 0.002; total CE area: r = 0.39, P = 0.031). RI´ scored considering coronary involvement by CE, differed significantly from RI scored without consideration of CE (RI v. RI´: 15 ± 6 v. 16 ± 6, P < 0.001). CONCLUSIONS Visualization and quantification of CMR coronary CE by CNR and total CE area could be utilized to detect subclinical and clinical coronary wall involvement, which is prevalent in IgG4-RD. The potential inclusion of small and medium-sized vessel involvements in the assessment of disease activity in IgG4-RD is worthy of further investigation.
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Affiliation(s)
- Yaqi Du
- Department of Radiology, the First Hospital of China Medical University, Shenyang, China
| | - Shuang Ding
- Department of rheumatology and immunology, the First Hospital of China Medical University, Shenyang, China
| | - Ce Li
- Department of Medical Oncology, the First Hospital of China Medical University, Shenyang, China
| | - Yun Bai
- Department of Radiology, the First Hospital of China Medical University, Shenyang, China
| | - Xinrui Wang
- Department of Radiology, the First Hospital of China Medical University, Shenyang, China
| | - Debiao Li
- Biomedical Imaging Research Institute, Cedars Sinai Medical Center, Los Angeles, California
| | - Yibin Xie
- Biomedical Imaging Research Institute, Cedars Sinai Medical Center, Los Angeles, California
| | - Guoguang Fan
- Department of Radiology, the First Hospital of China Medical University, Shenyang, China.
| | - Lian-Ming Wu
- Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
| | - Guan Wang
- Department of Radiology, the First Hospital of China Medical University, Shenyang, China.
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Piva TM, de Faria Junior CR, Kato M, de Oliveira FR, Louzada P, Wichert-Ana L. Reversal of IgG4-related aortitis after treatment evidenced by [18F]FDG PET/CT. Clin Rheumatol 2023; 42:313-314. [PMID: 36129564 DOI: 10.1007/s10067-022-06374-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/29/2022] [Accepted: 09/03/2022] [Indexed: 01/26/2023]
Affiliation(s)
- Thamyze Mirellly Piva
- Nuclear Medicine and PET/CT Laboratory, Department of Medical Imaging, Hematology and Clinical Oncology, Ribeirão Preto Medical School, University of São Paulo, USP, Ribeirão, Brazil
| | - Carlos Roberto de Faria Junior
- Rheumatology Division, Internal Medicine Department, Ribeirão Preto Medical School, University of São Paulo, USP, Ribeirão, Brazil
| | - Mery Kato
- Nuclear Medicine and PET/CT Laboratory, Department of Medical Imaging, Hematology and Clinical Oncology, Ribeirão Preto Medical School, University of São Paulo, USP, Ribeirão, Brazil
| | - Fabíola Reis de Oliveira
- Rheumatology Division, Internal Medicine Department, Ribeirão Preto Medical School, University of São Paulo, USP, Ribeirão, Brazil
| | - Paulo Louzada
- Rheumatology Division, Internal Medicine Department, Ribeirão Preto Medical School, University of São Paulo, USP, Ribeirão, Brazil
| | - Lauro Wichert-Ana
- Nuclear Medicine and PET/CT Laboratory, Department of Medical Imaging, Hematology and Clinical Oncology, Ribeirão Preto Medical School, University of São Paulo, USP, Ribeirão, Brazil.
- Seção de Medicina Nuclear, Hospital das Clínicas da FMRP- USP, Av. Bandeirantes, 3900, Ribeirão Preto, CEP:14048-900, SP, Brasil.
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Seitz L, Seitz P, Pop R, Lötscher F. Spectrum of Large and Medium Vessel Vasculitis in Adults: Primary Vasculitides, Arthritides, Connective Tissue, and Fibroinflammatory Diseases. Curr Rheumatol Rep 2022; 24:352-370. [PMID: 36166150 PMCID: PMC9513304 DOI: 10.1007/s11926-022-01086-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/26/2022] [Indexed: 11/24/2022]
Abstract
PURPOSE OF REVIEW To provide a comprehensive overview of the spectrum of large and medium vessel vasculitis in adults with primary vasculitides, arthritides, connective tissue, and fibroinflammatory diseases as well as vasculitis mimics, for an efficient differential diagnosis and initial diagnostic approach. RECENT FINDINGS Imaging has had a tremendous impact on the diagnosis of medium to large vessel vasculitis, now often replacing histopathologic confirmation and identifying new disease manifestations (e.g., intracranial disease in giant cell arteritis; vascular manifestations of IgG4-related disease). Novel diseases or syndromes involving blood vessels have been described (e.g., VEXAS-Syndrome with polychondritis). The use of the terms "medium" or "large" vessel varies considerably between medical specialties. The differential diagnosis of large and medium vessel vasculitis is becoming increasingly complex as new entities or disease manifestations of known inflammatory rheumatic diseases are regularly identified. A more precise and widely recognized definition of the vessel sizes would make future research more comparable.
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Affiliation(s)
- Luca Seitz
- Department of Rheumatology and Immunology, Inselspital, University Hospital, University of Bern, Freiburgstrasse, CH-3010, Bern, Switzerland.
- Immunodeficiency Laboratory, Department of Biomedicine, University Hospital and University of Basel, Basel, Switzerland.
| | - Pascal Seitz
- Department of Rheumatology and Immunology, Inselspital, University Hospital, University of Bern, Freiburgstrasse, CH-3010, Bern, Switzerland
| | - Roxana Pop
- Department of Infectious Diseases and Hospital Hygiene, University Hospital, University of Zurich, Zurich, Switzerland
| | - Fabian Lötscher
- Department of Rheumatology and Immunology, Inselspital, University Hospital, University of Bern, Freiburgstrasse, CH-3010, Bern, Switzerland
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Ratwatte S, Day M, Ridley LJ, Fung C, Naoum C, Yiannikas J. Cardiac manifestations of IgG4-related disease: a case series. Eur Heart J Case Rep 2022; 6:ytac153. [PMID: 35481260 PMCID: PMC9036079 DOI: 10.1093/ehjcr/ytac153] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/17/2022] [Accepted: 04/06/2022] [Indexed: 11/13/2022]
Abstract
Background IgG4-related disease (IgG4-RD) is an autoimmune condition affecting almost every organ system, with an early inflammatory phase and later fibrotic consequences. Vascular manifestations, particularly, large-vessel involvement in IgG4-RD, are well described. However, important IgG4-related effects on medium-sized arteries and the pericardium are less well recognized. These less frequently reported cardiovascular effects of IgG4-RD include coronary artery stenosis, pericardial disease, cardiac masses, and valvular heart disease. Case summary This case series focuses on three patients that demonstrate the cardiovascular effects of IgG4-RD and the pitfalls and importance of early diagnosis. Cases 1 and 2 presented with cardiac manifestations prior to more typical organ systems being affected which led to a delay in diagnosis. Case 1 presented with an acute myocardial infarction secondary to IgG4-RD of the coronary arteries and Case 2 presented with pericarditis which progressed to pericardial constriction due to IgG4-RD. Case 3 already had a diagnosis of IgG4-RD from a prior renal biopsy which raised the index of suspicion that his pericardial disease and thoracic mass were also related to IgG4-RD. Discussion Cardiac manifestations of IgG4-RD remain under-recognized and include coronary artery and pericardial disease. These manifestations often precede more typical manifestations in other organ systems. Recognizing cardiac manifestations of IgG4-RD on cardiac imaging can raise clinical suspicion and act as a catalyst to ascertain a confirmatory diagnosis. Early diagnosis and treatment are crucial to prevent potentially fatal outcomes and irreversible fibrosis.
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Affiliation(s)
- Seshika Ratwatte
- Department of Cardiology, Concord Repatriation and General Hospital, Hospital Road, Concord, NSW 2139, Australia
- Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | - Martin Day
- Department of Cardiology, Concord Repatriation and General Hospital, Hospital Road, Concord, NSW 2139, Australia
| | - Lloyd John Ridley
- Faculty of Medicine and Health, University of Sydney, Sydney, Australia
- Department of Radiology, Concord Repatriation and General Hospital, Concord, NSW, Australia
| | - Caroline Fung
- Department of Anatomical Pathology, Concord Repatriation and General Hospital, Concord, NSW, Australia
| | - Christopher Naoum
- Department of Cardiology, Concord Repatriation and General Hospital, Hospital Road, Concord, NSW 2139, Australia
- Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | - John Yiannikas
- Department of Cardiology, Concord Repatriation and General Hospital, Hospital Road, Concord, NSW 2139, Australia
- Faculty of Medicine and Health, University of Sydney, Sydney, Australia
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Evangelatos G, Grivas A, Pappa M, Kouna K, Iliopoulos A, Fragoulis GE. Cranial giant cell arteritis mimickers: A masquerade to unveil. Autoimmun Rev 2022; 21:103083. [PMID: 35341973 DOI: 10.1016/j.autrev.2022.103083] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 03/23/2022] [Indexed: 12/20/2022]
Abstract
Giant cell arteritis (GCA) is a large-vessel vasculitis that affects cranial and extra-cranial arteries. Extra-cranial GCA presents mainly with non-specific symptoms and the differential diagnosis is very broad, while the cranial form has more typical clinical picture and physicians have a lower threshold for diagnosis and treatment. Although temporal artery biopsy (TAB) has an established role, ultrasound (US) is being increasingly used as the first-line imaging modality in suspected GCA. Vasculitides (especially ANCA-associated), hematological disorders (mainly amyloidosis), neoplasms, infections, atherosclerosis and local disorders can affect the temporal arteries or might mimic the symptoms of cranial GCA and produce US and TAB findings that resemble those of temporal vasculitis. Given that prompt diagnosis is essential and proper treatment varies significantly among these diseases, in this review we aimed to collectively present disorders that can masquerade cranial GCA.
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Affiliation(s)
- Gerasimos Evangelatos
- Rheumatology Unit, First Department of Propaedeutic Internal Medicine, School of Medicine, Laiko Hospital, National and Kapodistrian University of Athens, Athens, Greece.
| | - Alexandros Grivas
- Clinical Immunology-Rheumatology Unit, Fourth Department of Internal Medicine, School of Medicine, Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Maria Pappa
- Rheumatology Unit, First Department of Propaedeutic Internal Medicine, School of Medicine, Laiko Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Konstantina Kouna
- Rheumatology Department, 417 Army Share Fund Hospital (NIMTS), Athens, Greece
| | - Alexios Iliopoulos
- Rheumatology Department, 417 Army Share Fund Hospital (NIMTS), Athens, Greece
| | - George E Fragoulis
- Rheumatology Unit, First Department of Propaedeutic Internal Medicine, School of Medicine, Laiko Hospital, National and Kapodistrian University of Athens, Athens, Greece
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Paratz ED, Ross L, Zentner D, Morgan N, Bouwer H, Lynch M, Parsons S, La Gerche A. Intracoronary IgG4-related disease as an unusual cause of sudden cardiac arrest: a case series. Eur Heart J Case Rep 2022; 6:ytac050. [PMID: 35187393 PMCID: PMC8851923 DOI: 10.1093/ehjcr/ytac050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/30/2021] [Accepted: 01/19/2022] [Indexed: 01/14/2023]
Abstract
Background IgG4-related disease (IgG4-RD) is a fibro-inflammatory condition classically causing retroperitoneal fibrosis, aortitis, thyroiditis, or pancreatitis. Diagnosis includes the presence of lymphoplasmacytic infiltrate (with >40% ratio IgG4+:IgG plasma cells) and fibrosis. Cardiac involvement may include aortic, pericardial, or coronary disease. Coronary manifestations encompass obstructive intra-luminal lesions, external encasing pseudo-tumour on imaging, or lymphoplasmacytic arteritis. Case summary Case 1: A fit and healthy 50-year-old man was found deceased. His only known medical condition was treated Hashimoto’s thyroiditis. Post-mortem examination demonstrated an isolated severe stenosis of the left anterior descending (LAD) coronary artery without histopathological evidence of acute myocardial infarction. Coronary plaque histopathology showed florid IgG4-positive plasma cell infiltrate throughout all layers of the artery with dense fibrous tissue connective tissue stroma, all features consistent with coronary artery IgG4-RD. Case 2: A 48-year-old man collapsed at work. Computed tomography scan 1 week prior reported an ill-defined para-aortic retroperitoneal soft tissue density. No cardiac symptoms were reported in life. Post-mortem examination showed coronary arteritis and peri-arteritis with sclerosing peri-aortitis in the LAD. There was myocardial fibrosis of the anterior left ventricle and focal myocarditis of the right ventricle. Discussion IgG4-related disease presenting as sudden cardiac death without any preceding symptoms is very rare (six prior cases identified on literature review). Reported targeted successful interventions for intracoronary IgG4-RD diagnosed in life have included steroid therapy and B cell depleting therapy (i.e. rituximab). If cardiac symptoms are present in a patient with known IgG4-RD, cardiac investigations should be promptly arranged.
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Affiliation(s)
- Elizabeth D Paratz
- Department of Cardiology, Baker Heart and Diabetes Institute, 75 Commercial Road, Prahran, VIC 3181, Australia
- Department of Cardiology, Alfred Hospital, 55 Commercial Road, Prahran, VIC 3181, Australia
- Department of Cardiology, St Vincent’s Hospital Melbourne, 41 Victoria Pde, Fitzroy. VIC 3065, Australia
| | - Laura Ross
- Department of Cardiology, St Vincent’s Hospital Melbourne, 41 Victoria Pde, Fitzroy. VIC 3065, Australia
- Department of Rheumatology, St Vincent’s Hospital Melbourne, 41 Victoria Pde, Fitzroy, VIC 3065, Australia
- Department of Medicine, The University of Melbourne at St Vincent’s, 41 Victoria Pde, Fitzroy, VIC 3065, Australia
| | - Dominica Zentner
- Department of Cardiology, Royal Melbourne Hospital, 300 Grattan Street, Parkville, VIC 3050, Australia
- Department of Cardiology, Royal Melbourne Hospital Clinical School, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, VIC 3000, Australia
| | - Natalie Morgan
- Victorian Institute of Forensic Medicine, 65 Kavanagh Street, Southbank, VIC 3006, Australia
| | - Heinrich Bouwer
- Victorian Institute of Forensic Medicine, 65 Kavanagh Street, Southbank, VIC 3006, Australia
- Department of Forensic Medicine, Monash University, 65 Kavanagh Street, Southbank, VIC 3006, Australia
| | - Matthew Lynch
- Victorian Institute of Forensic Medicine, 65 Kavanagh Street, Southbank, VIC 3006, Australia
- Department of Forensic Medicine, Monash University, 65 Kavanagh Street, Southbank, VIC 3006, Australia
| | - Sarah Parsons
- Victorian Institute of Forensic Medicine, 65 Kavanagh Street, Southbank, VIC 3006, Australia
- Department of Forensic Medicine, Monash University, 65 Kavanagh Street, Southbank, VIC 3006, Australia
| | - Andre La Gerche
- Department of Cardiology, Baker Heart and Diabetes Institute, 75 Commercial Road, Prahran, VIC 3181, Australia
- Department of Cardiology, Alfred Hospital, 55 Commercial Road, Prahran, VIC 3181, Australia
- Department of Cardiology, St Vincent’s Hospital Melbourne, 41 Victoria Pde, Fitzroy. VIC 3065, Australia
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Une plaque particulièrement glissante. Rev Med Interne 2021. [DOI: 10.1016/j.revmed.2021.10.092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Haan EA, Chamalaun FH, Chamuleau SAJ, Arnolda LF, Slavotinek JP, Wise NC, Gunawardane DN, Schwarze U, Byers PH, Gabb GM. Marfan syndrome resulting from a rare pathogenic FBN1 variant, ascertained through a proband with IgG4-related arteriopathy. Am J Med Genet A 2021; 185:2180-2189. [PMID: 33878224 DOI: 10.1002/ajmg.a.62218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 03/18/2021] [Accepted: 03/27/2021] [Indexed: 11/10/2022]
Abstract
A 57-year-old man with a family history of aortic aneurysm was found, during assessment of unexplained fever, to have an infrarenal aortic aneurysm requiring immediate repair. Dilatation of popliteal and iliac arteries was also present. Progressive aortic root dilatation with aortic regurgitation was documented from 70 years leading to valve-sparing aortic root replacement at 77 years, at which time genetic studies identified a likely pathogenic FBN1 missense variant c.6916C > T (p.Arg2306Cys) in exon 56. The proband's lenses were normally positioned and the Marfan syndrome (MFS) systemic score was 0/20. Cascade genetic testing identified 15 other family members with the FBN1 variant, several of whom had unsuspected aortic root dilatation; none had ectopia lentis or MFS systemic score ≥ 7. Segregation analysis resulted in reclassification of the FBN1 variant as pathogenic. The combination of thoracic aortic aneurysm and dissection (TAAD) and a pathogenic FBN1 variant in multiple family members allowed a diagnosis of MFS using the revised Ghent criteria. At 82 years, the proband's presenting abdominal aortic aneurysm was diagnosed retrospectively to have resulted from IgG4-related inflammatory aortopathy.
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Affiliation(s)
- Eric A Haan
- Adult Genetics Unit, Royal Adelaide Hospital, Adelaide and Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, South Australia, Australia
| | | | - Steven A J Chamuleau
- Department of Cardiology, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Leonard F Arnolda
- Medical School, Australian National University, Australian Capital Territory, Canberra, Australian Capital Territory, Australia
| | - John P Slavotinek
- Department of Radiology, Flinders Medical Center and Repatriation Health Precinct, SA Medical Imaging, SA Health and College of Medicine and Public Health, Flinders University, Bedford Park, South Australia, Australia
| | - Nadia C Wise
- Vascular Surgery, Division of Surgery, Flinders Medical Center and College of Medicine and Public Health, Flinders University, Bedford Park, South Australia, Australia
| | - Dimuth N Gunawardane
- Department of Anatomical Pathology/SA Pathology, Flinders Medical Center and Department of Anatomical Pathology/SA Pathology, Royal Adelaide Hospital, Adelaide, South Australia, Australia
| | - Ulrike Schwarze
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
| | - Peter H Byers
- Department of Medicine (Medical Genetics), University of Washington, Seattle, Washington, USA
| | - Genevieve M Gabb
- Cardiac and Critical Care, Division of Medicine, Flinders Medical Center, College of Medicine and Public Health, Flinders University, Bedford Park, South Australia, Australia.,Acute and Urgent Care, Royal Adelaide Hospital and Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, South Australia, Australia
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