Figure 3.

Initially suspicious but concordant nodule after imaging-cytology correlation. US scans ((a) transverse; (b) longitudinal) in a 54-year-old female without remarkable medical history show a 12 mm sized solid mass (arrows) with internal echogenic foci in the lower pole of the right lobe of the thyroid gland. The initial cytologic result was adenomatous hyperplasia which was concordant with US findings in imaging-cytology correlation after biopsy. At the time of imaging-cytology correlation, the echogenic foci (arrowheads) were thought to be related to colloids instead of microcalcifications from psammoma bodies. She underwent surgery (left total and right subtotal thyroidectomy) due to papillary carcinoma in the contralateral lobe of the thyroid gland. The mass in the right lobe was finally confirmed as adenomatous hyperplasia on pathology.