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(a) Axial view show a circumscribed isoechoic nodule (crosses). (b) Sagittal view a 2.9 cm circumscribed isoechoic nodule (crosses) is visible in the lower portion of the right thyroid gland. The US diagnosis was probably benign and the FNA result was Bethesda category IV (follicular neoplasm). Follicular thyroid carcinoma was revealed by total thyroidectomy. US was not informative for this Bethesda category IV nodule.
