Assessment of thyroid gland elasticity with shear-wave elastography in Hashimoto's thyroiditis patients

We aimed to investigate the use and effectiveness of Shear-Wave Elastography (SWE) in Hashimoto's Thyroiditis (HT) diagnosis and compare the SWE values in HT patients with asymptomatic volunteers.

The thyroid gland parenchyma of 74 patients whose clinical and laboratory findings and ultrasonography (US) features were indicative of HT and 75 healthy, asymptomatic participants with normal laboratory values were examined using SWE. Their thyroid parenchymal echoes and thyroid gland volume were measured using B-mode US examination. Elastographic measurements were made by plotting the boundaries of thyroid gland by hand, using Free Region of Interest (ROI). The quantitative SWE values [meters/second (m/s) and kilopascal (kPa)] were compared betweent the patients and the controls. The correlation analyses between the SWE measurements and the autoantibodies [Anti-thyroid peroxidase antibody (TPOAbs) and anti-thyroglobulin antibodies (TgAbs)], thyroid-stimulating hormone (TSH), freetriiodothyronine (fT3), free-thyroxine (fT4), and thyroglobulin levels were performed.

The mean thyroid SWE measurement values of HT group were significantly higher than the asymptomatic group (p < 0.001). This study proposes 29.45 kPa or 2.77 m/s as a sensitive-spesific cut-off value for HT. We revealed significant positive association between SWE values and TgAb levels, gland volume, TgAb, TPOAb levels, and a significant negative association between SWE and echogenicity (p < 0.001).

In the assessment of HT, SWE is a highly sensitive imaging method to estimate the degree of fibrosis and to provide objective numerical values.