ObjectivesWe aimed to evaluate and compare the diagnostic performance of five ultrasound thyroid imaging reporting and data system (TI-RADS) classification guidelines for thyroid nodules through a review and meta-analysis. MethodsWe searched for relevant studies before February 2020 in PubMed. Then we pooled the sensitivity. specificity. https://allfixelectricales.shop/product-category/vacuum-cone-filter/