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Large cohort studies demonstrated that a sizeable proportion of patients with acute COVID-19 present with symptoms or signs of rheumatological interest such as arthralgia/myalgia, inflammatory skin lesions and/or autoantibodies positivity.1 Subsequent clinical observations disclosed the existence of a post-acute COVID-19 syndrome, characterised by a large constellation of manifestations including fatigue, arthralgia and myalgia.2 The potential role of viruses in the development of rheumatic diseases is well recognised, either as causative agents or antigenic triggers for the ensuing development of autoimmunity.3 Consistent with these premises, from the earliest phases of the pandemic, inflammatory musculoskeletal manifestations following COVID-19 have been described in isolated case reports although no systematically collected cohorts are still available to unveil the clinical spectrum of post-COVID-19 arthritis.4
To contribute to shed light on this field, in December 2020, we built a web-based survey platform and invited all members of our study group to submit cases of inflammatory joint …
Handling editor Josef S Smolen
Contributors FU and CF conceived the work and drafted the manuscript. All authors contributed to the acquisition and interpretation of data and to the critical revision of the draft. All authors approve the final version of the manuscript and agree to be accountable for all aspects of the work.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting, or dissemination plans of this research.
Provenance and peer review Not commissioned; externally peer reviewed.