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Case report
Subacute thyroiditis associated with COVID-19
  1. Shaikh Abdul Matin Mattar1,
  2. Samuel Ji Quan Koh1,
  3. Suresh Rama Chandran2 and
  4. Benjamin Pei Zhi Cherng3
  1. 1Department of Internal Medicine, Singapore General Hospital, Singapore
  2. 2Department of Endocrinology, Singapore General Hospital, Singapore
  3. 3Department of Infectious Diseases, Singapore General Hospital, Singapore
  1. Correspondence to Dr Shaikh Abdul Matin Mattar; matin.mattar{at}


We report a case of a hospitalised patient with COVID-19 who developed subacute thyroiditis in association with SARS-COV-2 infection. The patient presented with tachycardia, anterior neck pain and thyroid function tests revealing hyperthyroidism together with consistent ultrasonographic evidence suggesting subacute thyroiditis. Treatment with corticosteroids resulted in rapid clinical resolution. This case illustrates that subacute thyroiditis associated with viruses such as SARS-CoV-2 should be recognised as a complication of COVID-19 and considered as a differential diagnosis when infected patients present with tachycardia without evidence of progression of COVID-19 illness.

  • thyroid disease
  • endocrinology
  • hyperthyroidism

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  • Contributors SAMM, SJQK, SRC and BPZC all contributed to the planning, conduct and reporting of the work described in the article. SAMM was the primary physician managing the patient with SJQK. SRC was the endocrinologist consulted and assisted in acquiring the ultrasound images. BPZC was the infectious diseases consultant with an overview of the patients with COVID-19 admitted to Singapore General Hospital.

  • 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 consent for publication Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.