Clinical data: a 37-year-old man requested a second opinion. He was examined for the first time two years earlier when a nodule was detected on screening. Cytology resulted in a benign, colloid goiter in another hospital and surgery was advised. He had no complaints.

Palpation: a firm nodule in the left thyroid.

Functional state: euthyroidism with TSH 2.05 mIU/L.

Ultrasonography revealed a moderately hypoechogenic nodule in the left lobe. The lesion presented a halo sign and perinodular blood flow.

Aspiration cytology: Hürthle-cell tumor.

Histopathology: disclosed Hürthle-cell adenoma.

 

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