Fig. 1.
Sonographic images of two nodules. Both were suspicious for papillary thyroid cancer, which was histologically confirmed. a This nodule would fulfill the current definition only (TTW ratio = 1.15); however, applying TIRADS, it would still be submitted to biopsy, being predominantly solid, partially hypoechoic, with lobulated margins. b This nodule would fulfill the arbitrary definition (TTW ratio = 1.35).