Fig. 2

Thyroid ultrasound and breast ultrasound. (A) Preoperative thyroid ultrasound revealed a slightly hypoechoic nodule in the right thyroid, 6 × 6 mm in size, regular in shape, clear in boundary, punctate blood flow signals, and microcalcifications, with a thyroid imaging reporting and data system (TI-RADS) classification of 4a. (B) Preoperative thyroid ultrasound revealed a hypoechoic nodule in the right thyroid, 8 × 5 mm in size, irregular in shape, less clear in boundary, rich in blood flow signals, and microcalcifications, with a TI-RADS classification of 4b. (C) Breast ultrasound at the first visit showed the left breast with multiple hypoechoic nodules, maximum size of 9 × 5 mm, regular in shape, clear in boundary, no blood flow signal, with a breast imaging reporting and data system (BI-RADS) classification of 3. (D) Breast ultrasound at the first visit showed multiple hypoechoic nodules in the right breast, one of which was tumor-like hyperplasia, 18 × 7 mm in size, less regular in shape, less clear in boundary, no blood flow signal, with a BI-RADS classification of 4a