Fig. 6
From: Ultrasonography of thyroid nodules: a pictorial review
The thyroid nodule in the left lobe consists of colloids with their characteristic ‘comet-tail’ shadowing (arrows). However, it is hypo-echoic with an echo signal close to the adjacent strap muscle. Power Doppler shows marked intra-nodular vascularity. Multiple sinister characteristics of the nodule put it between U4 and U5, which require FNAC