Figure 3.

Diagnosis of thyroid adenoma in a 53-year-old male through postoperative pathology. (A) Two-dimensional ultrasound showing a solitary nodule in the middle lower pole of the left lobe of thyroid gland, with an oval shape, an aspect ratio of <1, clear boundary, isoecho and no internal calcification. (B) CDFI showing thick blood flow signals inside and around the nodule, and a regular course of peripheral blood flow signals; the ultrasound results suggested that the nodule met the TI-RADS category 3, and that it may be thyroid adenoma. CDFI, color Doppler flow imaging.