title: Radiofrequency ablation for postsurgical thyroid removal of differentiated thyroid carcinoma.
abstract: Differentiated thyroid carcinoma (DTC) is the most common endocrine malignancy. Surgical removal with radioactive iodine therapy is recommended for recurrent thyroid carcinoma, and the postsurgical thyroid removal is critical. This study evaluated the clinical values of radiofrequency ablation (RFA) in the postsurgical thyroid removal for DTC. 35 DTC patients who had been treated by subtotal thyroidectomy received RFA for postsurgical thyroid removal. Before and two weeks after RFA, the thyroid was examined by ultrasonography and (99m)TcO4 (-) thyroid imaging, and the serum levels of free triiodothyronine (FT3), free thyroxin (FT4), thyroid stimulating hormone (TSH) and thyroglobulin (Tg) were detected. The efficacy and complications of RFA were evaluated. Results showed that, the postsurgical thyroid removal by RFA was successfully performed in 35 patients, with no significant complication. After RFA, the average largest diameter and volume were significantly decreased in 35 patients (P > 0.05), and no obvious contrast media was observed in ablation area in the majority of patients. After RFA, the serum FT3, FT4 and Tg levels were markedly decreased (P < 0.05), and TSH level was significantly increased (P < 0.05). After RFA, radioiodine concentration in the ablation area was significantly reduced in the majority of patients. The reduction rate of thyroid update was 0.69±0.20%. DTC staging and interval between surgery and RFA had negative correlation (Pearson coefficient = -0.543; P = 0.001), with no obvious correlation among others influential factors. RFA is an effective and safe method for postsurgical thyroid removal of DTC.
authors.affiliation: Department of Ultrasound, Zhejiang Cancer Hospital Hangzhou 310022, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Xu
authors.affiliation: Department of Ultrasound, Zhejiang Cancer Hospital Hangzhou 310022, China.
authors.forename: Lipin
authors.initials: L
authors.lastname: Wang
authors.affiliation: Department of Nuclear Medicine, Zhejiang Cancer Hospital Hangzhou 310022, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Long
authors.affiliation: Department of Nuclear Medicine, Zhejiang Cancer Hospital Hangzhou 310022, China.
authors.forename: Xuemei
authors.initials: X
authors.lastname: Ye
authors.affiliation: Department of Head and Neck Surgery, Zhejiang Cancer Hospital Hangzhou 310022, China.
authors.forename: Minghua
authors.initials: M
authors.lastname: Ge
authors.affiliation: Department of Head and Neck Surgery, Zhejiang Cancer Hospital Hangzhou 310022, China.
authors.forename: Kejing
authors.initials: K
authors.lastname: Wang
authors.affiliation: Department of Head and Neck Surgery, Zhejiang Cancer Hospital Hangzhou 310022, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Guo
authors.affiliation: Department of Nuclear Medicine, Zhejiang Cancer Hospital Hangzhou 310022, China.
authors.forename: Linfa
authors.initials: L
authors.lastname: Li
keywords: Radiofrequency ablation; differentiated thyroid carcinoma; removal; ultrasonography