Comparison of preoperative diagnostic value between ultrasonography and magnetic resonance imaging for the extrathyroidal extension of papillary thyroid carcinoma / 中国医师进修杂志

ABSTRACT

Objective To evaluate the diagnostic value of preoperative ultrasonography(US)and magnetic resonance imaging (MRI) for the extrathyroidal extension (ETE) in patients with papillary thyroid carcinoma(PTC).Methods The clinical data of 90 patients with PTC from January 2013 to June 2016 were analyzed retrospectively,and all patients were examined by US and MRI before operation.The diagnostic sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy of minimal ETE, extensive ETE and ETE (minimal ETE + extensive ETS) were compared between UC and MRI.Results The diagnostic minimal ETE sensitivity of UC was significantly higher than that of MRI (81.9% vs.60.0%), and there was statistical difference (P<0.05).The diagnostic extensive ETE specificity of MRI was significantly higher than that of UC(80.9% vs.63.5%),and there was statistical difference (P<0.01).The diagnostic ETE sensitivity and NPV of UC were significantly higher than those of MRI(97.4% vs.88.3% and 80.0% vs.50.0%),and there were statistical differences (P<0.05 or <0.01).Conclusions US has a higher sensitivity, compared with MRI for diagnostic minimal ETE.MRI has a higher specificity for diagnostic extensive ETE,compared with US.And US has a higher sensitivity and NPV for diagnostic ETE,compared with MRI.