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Scheme of defining group indicating immediate surgery group of ideal or appropriate candidates for AS and delayed surgery imitating group of ideal or appropriate candidates for AS except accompanying with clinically apparent LNM.
Abbreviations: AS, active surveillance; CCND, central compartment neck node dissection; ETE, extrathyroidal extension; LNM, lymph node metastasis; MRND, modified radical neck dissection; PTMC, papillary thyroid microcarcinoma; TT, total thyroidectomy.
