Abstract
Objective: We aimed to determine the effect of percutaneous ethanol injection (PEI) on volume of cystic and mixed thyroid nodules, thyroid function tests (TFTs), antibody titers, and cytologic changes for 1 year. Methods: Fifty-five nodules from 53 patients with cystic and mixed properties treated with PEI were included. Nodule volumes, TFTs, and thyroid autoantibodies were analyzed at baseline, 6 months, and 12 months. Fine-needle aspiration biopsy (FNAB) was performed to PEI-treated nodules in the 12th month. Thyroid nodules were classified into three groups by structural properties (purely cystic, predominantly cystic, predominantly solid). Results: PEI caused a volume reduction of 80.7% at 6 months and 82.1% at 12 months, without any serious complications. PEI was repeated 1.4 ± 0.4 times with a mean total ethanol amount of 3.6 ± 3.1 mL. Volume reduction in the purely cystic nodules in the 6th and 12th months after PEI was greater than the volume reductions in predominantly cystic and predominantly so...
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