Three months before the therapy (first row of images):

Clinical presentation: A 48-year-old woman came to a follow-up examination of a third time recurring cyst.

Palpation: Both lobes were nodular.

Functional state: euthyroidism with slightly elevated TSH (TSH 4.99 mIU/L, FT4 14.3 pM/L).

Ultrasonography. The thyroid was echonormal. There was a cystic nodule in the right lobe containing minimally hypoechogenic solid part. The lesion showed a combined intranodular and perinodular blood flow. There were smally cystic areas in the left lobe.

We offered sclerotherapy but the patient asked for a last aspiration. 4.5 mL yellow cystic fluid was aspirated. Cytology resulted in benign cystic lesion.

Three session of sclerotherapies (2-4. rows of images):

Clinical presentation: The cyst has recurred again. Four sessions of sclerotherapy were performed. 4.5 mL cystic fluid was removed at the first session while on subsequent occasions no cystic fluid was aspirated. 1.5 mL, 4 mL, 1 mL and 2 mL ethanol was administered, 1st, 2nd, 3rd and 4th sessions of sclerotherapy, respectively. Except for straining pain after two occasions, the therapy caused no problem.

Follow-up examinations at 6 weeks, 4 months, 1 year and 2 years (5-8. rows of images):

The essence of follow up, i.e. the size of the nodule is given above. The volume of the nodule two years after the therapy is 30.4% of the pretherapy level. The patient was continuously euthyroid, at last visit the TSH was 3.43 mIU/L while the aTPO was 71 U/mL.