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Revisiting Rupture of Benign Thyroid Nodules after Radiofrequency Ablation: Various Types and Imaging Features

Endocrinology and Metabolism
2019년 34권 4호 p.415 ~ p.421
정새롬 ( Chung Sae-Rom ) - University of Ulsan College of Medicine Asan Medical Center Department of Radiology

백정환 ( Baek Jung-Hwan ) - University of Ulsan College of Medicine Asan Medical Center Department of Radiology
성진용 ( Sung Jin-Yong ) - Daerim St. Mary’s Hospital Thyroid Center Department of Radiology
류지화 ( Ryu Ji-Hwa ) - Inje University College of Medicine Haeundae Paik Hospital Department of Radiology
정소령 ( Jung So-Lyung ) - Catholic University College of Medicine Seoul St. Mary’s Hospital Department of Radiology

Abstract

Background: To evaluate the imaging features, clinical manifestations, and prognosis of patients with thyroid nodule rupture after radiofrequency ablation (RFA).

Methods: The records of 12 patients who experienced thyroid nodule rupture after RFA at four Korean thyroid centers between March 2010 and July 2017 were retrospectively reviewed. Clinical data evaluated included baseline patient characteristics, treatment methods, initial presenting symptoms, imaging features, treatment, and prognosis.

Results: The most common symptoms of post-RFA nodule rupture were sudden neck bulging and pain. Based on imaging features, the localization of nodule rupture was classified into three types: anterior, posterolateral, and medial types. The anterior type is the most often, followed by posterolateral and medial type. Eight patients recovered completely after conservative treatment. Four patients who did not improve with conservative management required invasive procedures, including incision and drainage or aspiration.

Conclusion: Thyroid nodule rupture after RFA can be classified into three types based on its localization: anterior, posterolateral, and medial types. Because majority of thyroid nodule ruptures after RFA can be managed conservatively, familiarity with these imaging features is essential in avoiding unnecessary imaging workup or invasive procedures.

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