TERT and differentiated thyroid carcinoma: PTC, Papillary thyroid carcinoma; FNA, fine needle aspiration; US, ultrasound; AUS, atypia of undetermined significance; FLUS, follicular lesion of undetermined significance; US-RSS, ultrasound-based risk stratification system; ROM, risk of malignancy; C-TIRADS, Chinese thyroid imaging reporting and data system; AUS-NA, atypia of undetermined significance-nuclear atypia; FLUS, follicular lesion of undetermined significance; BRAF+, AUS/FLUS nodules with BRAF V600E mutation; TERT, Telomerase Reverse Transcriptase.