First examination (first row of images)

Clinical presentation. A 36-year-old woman noticed enlargement of the left thyroid after an upper airway infection.

Palpation. The left lobe had an elastic nodule.

Result of blood tests: TSH 1.69 mIU/L.

Ultrasonography. The thyroid was echonormal. There was a central-type cystic lesion in the left lobe. The cystic part presented numerous echogenic granules without a tail.

We aspirated 5 mL bloody fluid. Aspiration cytology resulted in non-diagnostic cystic lesion.

Suggestion: thyroid ultrasound in a year.

Second examination one year later (second row of images)

Clinical presentation. The patient had no compaints.

Palpation: unchanged.

Result of blood tests: TSH 2.44 mIU/L.

Ultrasonography. The cystic nodule had refilled. The presentation remained the same.

7 mL brown fluid was aspirated. Cytology: benign, cystic lesion.

Suggestion: ultrasound in two years.