MR findings with dynamic evaluation in Riedel's thyroiditis
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Updated: Oct 2, 2026

Synchronous Triplanar Reconstruction Integrated with Color Doppler Mapping for Precise and Rapid Localization of Thyroid Lesions
Published on: February 9, 2024
Naoya Takahashi1, Kouichirou Okamoto, Kunio Sakai
1Department of Radiology, Niigata University School of Medicine, 1 Asahimachi, Niigata, Niigata, Japan.
Abstract:
We reported the findings on MRI in a patient with proven Riedel's thyroiditis. The lesion was seen as slightly heterogeneous hypointensity on both T1- and T2-weighted images and had a mild enhancement after administration of gadpentate dimeglumine (Gd-DTPA). Dynamic MR study showed gradual increase in signal intensity of the lesion. These findings were different from those of thyroid neoplasms and were considered to reflect the mixture of inflammatory cells infiltration and fibrosis of Riedel's thyroiditis.
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