ROLE OF VIRTUAL TOUCH TISSUE QUANTIFICATION IN HASHIMOTO'S THYROIDITIS

We investigated the role of the virtual touch tissue quantification (VTQ) technique in diagnosing Hashimoto's thyroiditis (HT) and in distinguishing various HT-related thyroid dysfunctions. Two hundred HT patients and 100 healthy volunteers (the control group) were enrolled. The diagnostic performance of VTQ in predicting HT was calculated as the area under the receiver operating characteristic curve (A(z)). The HT patients were further classified into three subgroups on the basis of serologic tests of thyroid function: hyperthyroidism, euthyroidism and hypothyroidism. Comparisons of shear wave velocity (SWV) between three subgroups were evaluated by analysis of variance. The mean SWV of the control group was significantly lower than that of the HT group (1.93 +/- 0.33 m/s vs. 2.32 +/- 0.49 m/s, p < 0.001). A(z) was 0.734 with a cut-off value of 1.86 m/s for performance of SWV in distinguishing between HT and a healthy thyroid; the sensitivity and specificity were 82.5% and 50.0%, respectively. Mean SWV values in the three HT subgroups (hyperthyroidism [2.07 +/- 037 cm/s] vs. euthyroidism [2.20 +/- 0.40 cm/s] vs. hypothyroidism [2.49 +/- 0.46 cm/s]) were significantly different (p < 0.05). Our results suggest that VTQ is a promising technique for assessing HT and HT-related thyroid dysfunction. (C) 2018 World Federation for Ultrasound in Medicine & Biology. All rights reserved.