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. 2022 Mar 12;76(2):495–498. doi: 10.1007/s12020-022-03028-5

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© The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2022

This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.

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Fig. 1 — A Left ventricular ejection fraction and thyroid hormone concentrations over the course of the disease. Upper plot: LVEF, expressed as number %. Medium plot: FT4 concentrations, expressed in pg/mL. Lower plot FT3 concentrations, expressed in pg/mL. X axis reports the time (days); key moments in the patient’s clinical history are identified by vertical dotted lines. Y axis reports the appropriate variable for each panel, together with the respective reference ranges. Blue squares indicate methylprednisolone dosages. LVEF left ventricular ejection fraction; FT4 free thyroxine; FT3 free triiodothyronine. B, C Representative histopathological images from thyroid surgical specimens (hematoxylin and eosin staining). The focal disruption of the thyroid follicles is shown with small collections of macrophages intermingled with scattered lymphocytes (original magnification, ×10 and ×20, for B, C, respectively)