Clinical presentation: A 73-year-old man with a nodule discovered incidentally by carotid Doppler examination.

Palpation: A relatively firm nodule was palpable in the left lobe.

Functional state: euthyroidism (TSH-level 2.81 mIU/L).

Ultrasonography. There was a solitary hypoechogenic nodule in the left lobe.

Cytology resulted in Hürthle-cell tumor.

Histopathology disclosed Hürthle-cell variant of follicular cancer.