biostudies-literatureLee JYPatient-Doctor Shared Decision Marking Research Center2024 Clinical Practice Guideline Research Fund1060-1082https://www.ebi.ac.uk/biostudies/studies/S-EPMC11625847biostudies-literatureUnknown85(6)Active surveillance (AS) has been widely adopted as an alternative to immediate surgery owing to the indolent nature and favorable outcomes of papillary thyroid microcarcinoma (PTMC). AS is generally recommended for tumors measuring ≤1 cm without aggressive cytological subtypes, risk of gross extrathyroidal extension (ETE), lymph node metastasis (LNM), or distant metastasis. AS requires careful patient selection based on various patient and tumor characteristics, and ultrasound (US) findings. Moreover, during AS, regular US is performed to monitor any signs of tumor progression, including tumor growth, new US features of potential gross ETE, and LNM. Therefore, appropriate imaging-based assessment plays a crucial role in determining whether AS or surgery should be pursued. However, detaileJournal of the Korean Society of RadiologyStandardized Ultrasound Evaluation for Active Surveillance of Low-Risk Thyroid Microcarcinoma in Adults: 2024 Korean Society of Thyroid Radiology Consensus Statement.PMC11625847RS-2023-KH142322Jung SLKorean Society of Thyroid Radiology (KSThR)Lee CYNa DGYoon JHLee JYChung SRKorean Society of RadiologyShin JHHahn SYBaek JHLim HKKim JHLee MKSung JYfalseStandardized Ultrasound Evaluation for Active Surveillance of Low-Risk Thyroid Microcarcinoma in Adults: 2024 Korean Society of Thyroid Radiology Consensus Statement.Active surveillance (AS) has been widely adopted as an alternative to immediate surgery owing to the indolent nature and favorable outcomes of papillary thyroid microcarcinoma (PTMC). AS is generally recommended for tumors measuring ≤1 cm without aggressive cytological subtypes, risk of gross extrathyroidal extension (ETE), lymph node metastasis (LNM), or distant metastasis. AS requires careful patient selection based on various patient and tumor characteristics, and ultrasound (US) findings. Moreover, during AS, regular US is performed to monitor any signs of tumor progression, including tumor growth, new US features of potential gross ETE, and LNM. Therefore, appropriate imaging-based assessment plays a crucial role in determining whether AS or surgery should be pursued. However, detaile2024-01-01T00:00:00Z2024 Nov2025-04-22T16:52:55.81Z2025-04-06T01:57:44.289ZS-EPMC116258473966031110.3348/jksr.2024.0132