Clinical presentation: a 49-year-old woman was referred for an evaluation of a nodular goiter which evolved over 2 years and caused difficulties in swallowing in the last few months.

Palpation: a moderately firm nodule in the right lobe.

Functional state: euthyroidism with TSH 3.01 mIU/L.

Ultrasonography: revealed a moderately hypoechogenic, inhomogeneous nodule in the left thyroid. The presence of a halo sign was equivocal, while the nodule displayed a type 2 vascular pattern.

Cytological report: Hürthle-cell tumor.

Histopathology: disclosed Hürthle-cell adenoma.