ACR Meeting Abstracts

ACR Meeting Abstracts

Abstract Number: 1569

Lung Involvement in VEXAS Syndrome

Marta Casal Moura1, Misbah Baqir1, Yasmeen Tandon2, Matthew J. Samec3, Kaaren K. Reichard4, Abhishek Mangaonkar5, Ronald S. Go5, Kenneth J. Warrington6, Mrinal Patnaik7, Matthew J. Koster6 and Jay H. Ryu1, 1Mayo Clinic, Division of Pulmonary and Critical Care Medicine, Department of Medicine, Rochester, USA, Rochester, 2Mayo Clinic, Radiology, Rochester, USA, Rochester, 3Mayo Clinic, Division of Rheumatology, Department of Medicine, Rochester, USA, Rochester, 4Mayo Clinic, Department of Laboratory Medicine and Pathology, Rochester, USA, Rochester, 5Mayo Clinic, Division of Hematology, Department of Medicine, Rochester, USA, Rochester, 6Mayo Clinic, ROCHESTER, MN, 7Mayo Clinic, Division of Hematology, Department of Medicine, Rochester, United States of America, Rochester

Meeting: ACR Convergence 2022

Keywords: , , ,

Session Information

Date: Sunday, November 13, 2022

Title: Vasculitis – Non-ANCA-Associated and Related Disorders Poster II

Session Type: Poster Session C

Session Time: 1:00PM-3:00PM

Background/Purpose: Vacuoles, E1 enzyme, X-linked, autoinflammatory, somatic (VEXAS) syndrome is a recently identified disorder caused by somatic mutations in the UBA1 gene of myeloid cells. Pulmonary involvement has been reported, but a detailed description of lung involvement and radiologic findings is lacking.

Methods: A retrospective cohort study was conducted of all patients identified at the Mayo Clinic with VEXAS syndrome since October 2020. Clinical records and chest high resolution computed tomography (HRCT) scans were reviewed.

Results: Our cohort comprised 22 white men with a median age of 69 years (range 57-84). Hematologic disorders including multiple myeloma, myelodysplastic syndrome and pancytopenia were present in 10 patients (45%), rheumatologic diseases including granulomatosis with polyangiitis, IgG4-related disease, polyarteritis nodosa, relapsing polychondritis, and rheumatoid arthritis were found in 10 patients (45%), and 4 patients had dermatologic presentations including Sweet syndrome, Schnitzer-like syndrome or drug rash with eosinophilia skin syndrome (DRESS). VEXAS syndrome related features included fever (18,82%), skin lesions (20,91%), lung infiltrates (12,55%), chondritis (10,45%), venous thromboembolism (12,55%), macrocytic anemia (21,96%), and bone marrow vacuoles (22,100%). The somatic mutations affecting methionine-41 (p.Met41) in UBA1 gene were: 11 (50%) p.Met41Thr, 7 (32%) p.Met41Val, 2 (9%) p.Met41Leu, and 2 (9%) in the splice site. All patients received glucocorticoids (GC) (median duration of treatment was 2.6 years); 21 (96%) received conventional immunosuppressive agents (methotrexate, azathioprine, mycophenolate, leflunomide, cyclosporin, hydroxychloroquine, tofacitinib, ruxolitinib) and 9 (41%) received biologic agents (rituximab, tocilizumab, infliximab, etanercept, adalimumab, golimumab, abatacept). Respiratory symptoms included dyspnea and cough present in 21 (95%) and 12 (55%). Bronchoalveolar lavage (BAL) was available in 4 patients, with neutrophilic alveolitis in 3. Two patients had lung biopsies that showed ATTR amyloidosis and organizing pneumonia with lymphoid interstitial pneumonia, respectively. Pulmonary function tests were available in 9 (41%) patients and showed normal results in 5; 3 patients had isolated reduction in DLCO and 1 had mild restriction. On chest HRCT, 16 patients (73%) had parenchymal changes including ground-glass opacities in 9, septal thickening in 4, and nodules in 3; pleural effusions were present in 3 patients, air-trapping in 3 patients and tracheomalacia in 1 patient. Follow-up chest HRCT was available for 8 patients (36%), the ground-glass opacities resolved in 5 patients, 3 patients manifested new or increased ground-glass opacities, and 1 patient had increased interlobular septal thickening. VEXAS flares occurred in 18 patients (82%), the maximum number of relapses was 7, and they were mainly managed with GC and with changes in the immunosuppressive regimen.

Conclusion: Pulmonary involvement was documented by chest HRCT in most patients with VEXAS syndrome. The pulmonary manifestations of VEXAS are nonspecific and characterized predominantly by inflammatory parenchymal involvement.

Supporting image 1

Supporting image 2

Response to glucocorticoids documented with chest HRCT. Follow-up chest HRCT was available for 8 patients (36%): GGO resolved (5), new or increased GGO (3) (during flares), increased interlobular septal thickening (1).

Disclosures: M. Casal Moura, None; M. Baqir, None; Y. Tandon, None; M. Samec, None; K. Reichard, None; A. Mangaonkar, None; R. Go, None; K. Warrington, Eli Lilly, GlaxoSmithKlein(GSK), Kiniksa, Chemocentryx; M. Patnaik, None; M. Koster, None; J. Ryu, None.

To cite this abstract in AMA style:

Casal Moura M, Baqir M, Tandon Y, Samec M, Reichard K, Mangaonkar A, Go R, Warrington K, Patnaik M, Koster M, Ryu J. Lung Involvement in VEXAS Syndrome [abstract]. Arthritis Rheumatol. 2022; 74 (suppl 9). https://acrabstracts.org/abstract/lung-involvement-in-vexas-syndrome/. Accessed .

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