Figure 2.

Diagnosis of PTC in a 39-year-old female through postoperative pathology. (A) Two-dimensional ultrasound showing a solitary nodule in the upper pole of the right lobe of thyroid gland, with an irregular shape, an aspect ratio of >1, an unclear boundary, hypoecho and internal microcalcification. (B) CDFI showing blood flow signals inside and around the nodule; the ultrasound results suggested that the nodule met the TI-RADS category 5, and that it may be PTC. PTC, papillary thyroid carcinoma; CDFI, color Doppler flow imaging.