Figure 2. Strain ultrasound elastography. 1: The examined area was homogenously green (elasticity in the whole area examined; benign nodule), 2: the examined area was light green and red with peripheral and central blue mass (the elasticity in the large portion of the examined area; indeterminate follicular lesion), 3: the examined area was blue with some light green and red mass (the large portion of nodule with stiffness; nodule suspicious for malignancy), 4: the area was homogeneously blue (non-elastic nodule; malignant nodule). A: Real-time ultrasound evaluations. B: Ultrasound elastography evaluation. Real-time ultrasonography and ultrasound elastography were performed by ultrasound technologists with a minimum experience of 5 years.