Clinical data: a 47-year-old woman with a newly discovered nodule on screening. A firm nodule was palpated in the right lobe.

Functional state: euthyroidism with TSH-level 3.06 mIU/L.

Ultrasonography: a hypoechogenic lesion in the right lobe with intranodular blood flow.

Cytological report: oncocytic variant of papillary cancer.

Histopathology: papillary cancer.