Clinical data: a 19-year-old woman was referred to another hospital for the evaluation of weight loss and palpitation. Ultrasonography revealed multiple 'nodules'. The endocrinologist suggested FNAC.

Palpation: no abnormality.

Functional state: euthyroidism (TSH-level 0.99 mIU/L).

Ultrasonography: there were multiple small hypoechogenic areas in both lobes. The borders of these lesions were irregular.  The US pattern corresponded to autoimmune thyroiditis.

Cytological picture: there is no colloid in the background. Clusters of follicular cells were in heterogeneous lymphoid background.

Cytological diagnosis: Hashimoto's thyroiditis. Anti-TPO was also performed and was in the normal range (8 U/mL).

Suggestion: regular follow-up investigations.

A year later the patient became pregnant. During the 6th week of the pregnancy the TSH resulted in 6.9 mIU/L.  Levo-tiroxine was administered.

Comment: the greatest issue in thyroid ultrasonography is the misinterpretation of hypoechogenic areas of Hashimoto's  thyroiditis as nodules. Although the US pattern  was  unequivocal, we performed FNAC mainly for a psychological  reasons. The term 'nodule' caused great fear of cancer. In this case, there was a second reason of aspiration: the negative anti-TPO test.