摘要目的比较应用Bethesda系统前后甲状腺影像报告与数据系统(TI-RADS)对细胞学检查无法确诊的甲状腺结节的恶性风险评估及有效性的差异。材料与方法本回顾性研究经伦理委员会批准,豁免知情同意。763例细胞学检查无法确诊的病人共790个甲状腺结节纳入研究[平均(52.3±11.5)岁];485个结节来源于Bethesda系统应用之前(2007年3月—2008年12月),305个结节来源于Bethesda Abstract Objective To compare the malignant risk assessment and efficacy of thyroid nodules with undetectable cytology by using the Bethesda System for Thyroid Imaging Reporting and Data System (TI-RADS). Materials and Methods This retrospective study was approved by the Ethics Committee and exempted from informed consent. A total of 790 thyroid nodules from 763 patients with unidentifiable cytology were included in the study [mean (52.3 ± 11.5) years]; 485 nodules were derived from the Bethesda system before (March 2007-December 2008); 305 Nodules are from Bethesda