Ultrasound, Elastography, and Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography Imaging in Riedel's Thyroiditis: Report of Two Cases

Abstract

US features, such as vascular encasement and improvement under corticosteroid treatment, seem to be specific to this rare disease. For the first time, USE documents the hardness of RT tissues. Apart from the FDG-PET/CT findings that merit further investigation, US and USE prove useful tools in the assessment of such a rare disease.