RT Journal Article SR Electronic T1 Subacute thyroiditis associated with COVID-19 JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e237336 DO 10.1136/bcr-2020-237336 VO 13 IS 8 A1 Shaikh Abdul Matin Mattar A1 Samuel Ji Quan Koh A1 Suresh Rama Chandran A1 Benjamin Pei Zhi Cherng YR 2020 UL http://casereports.bmj.com/content/13/8/e237336.abstract AB 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.