Clinical presentation: A 41-year-old woman was referred for aspiration cytology of a nodule detected on evaluation of palpitation, nervousness and lump in the throat feeling.

Palpation: No abnormality.

Laboratory tests: TSH 4.18 mIU/L, aTPO 171 U/mL.

Ultrasound. The thyroid was echonormal and had several hypoechogenic areas. The echogenicity index was around 25 to 30% and 15%, right and left lobe, respectively. The largest hypoechogenic field located in the upper lateral part of the lobe was held as a nodule on previous ultrasound report. On the other hand, this lesion did not meet the criteria of a true nodule.

Aspiration cytology from the lesion in question resulted in Hashimoto's thyroiditis.

Comment. The lesions are unlikely being nodules in pathological sense.