LAUSR

We read with great interest the case report by Sun et al. (1), entitled “Papillary thyroid carcinoma treated with radiofrequency ablation in a patient with hypertrophic cardiomyopathy: a case report,” and the letter to the editor by Kim (2), both of which were published in the Korean Journal of Radiology. Sun et al. (1) presented a case of papillary thyroid microcarcinoma (PTMC) treated with radiofrequency ablation in an inoperable condition, and Kim (2) made a comment that simple observation would have been more appropriate rather than radiofrequency ablation for the presented case. There is an ongoing debate on the management of low-risk PTMC, which is not associated with poor prognostic features such as extrathyroidal extension or lymph node metastasis. Recently, active surveillance, instead of immediate surgery, has been suggested for the first-line management of low-risk PTMC (3, 4). This recommendation is based on the results of Japanese