Late diagnosis of severe long-standing autoimmune hypothyroidism after the first lockdown for the Covid-19 pandemic: clinical features and follow-up.

Background And Aim: Hashimoto's thyroiditis (HT) is a common endocrinopathy in children, particularly in females. Clinical overt presentation of hypothyroidism in HT includes mild to very severe forms, characterised by impairment of many body functions and organs, such as heart, brain, muscles, ovaries and liver.

Case: we report the case of a 14-year-old girl, with severe hypothyroidism due to a late diagnosis of HT during the Covid-19 pandemic.