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Case of acute arthritis following SARS-CoV-2 infection
  1. Naoto Yokogawa1,2,
  2. Naoto Minematsu2,
  3. Harutaka Katano3,
  4. Tadaki Suzuki3
  1. 1 Department of Rheumatic Diseases, Tokyo Metropolitan Tama Medical Center, Fuchu, Tokyo, Japan
  2. 2 Department of Internal Medicine, Hino Municipal Hospital, Hino, Tokyo, Japan
  3. 3 Department of Pathology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
  1. Correspondence to Dr Naoto Yokogawa, Department of Rheumatic Diseases, Tokyo Metropolitan Tama Medical Center, Fuchu 183-8524, Tokyo, Japan; yokogawan{at}

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In a recent issue of ARD, López-González and colleagues reported case series of acute arthritis during COVID-19 admission; the authors concluded that all four cases of acute arthritis in their report were due to crystal-proven gout flares or calcium pyrophosphate deposition disease.1 Here we would like to share another case of COVID-19 presenting delayed arthritis without crystal deposition.

A 57-year-old, male, Japanese patient with a history of hypertension and hyperlipidaemia was admitted to our hospital with cough, fever and malaise of 3 days’ duration. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA was positive at admission on real-time (RT) PCR using nasopharyngeal swabs (SRL Inc). Chest X-rays and CT showed multiple, peripheral, ground-glass opacities …

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  • Contributors NY and NM contributed to the conception and drafting of the article. All authors provided critical revision for important intellectual content and final approval.

  • 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; internally peer reviewed.