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- Etiology: Autoimmune thyroiditis
- Imaging US:
— Initially thyroid gland diffusely enlarged with heterogenous echotexture
— Hypoechoic micronodules with surrounding echogenic septations or hyperechoic micronodules with surrounding hypoechoic septations (pseudonodular pattern)
- Imaging US Color Doppler: Usually normal or decreased flow on US Color Doppler but occasionally may be hypervascular
- DDX:
- Complications: At higher risk for papillary thyroid carcinoma so discrete nodule should be biopsied
- Treatment: Life-long L-thyroxine (T4)
- Clinical: Usually present with hypothyroidism and goiter
Radiology Cases of Hashimoto Thyroiditis
Transverse grayscale (above) and color doppler (below) US of the thyroid show an enlarged, heterogenous thyroid gland that has increased vasacularity.
