Endobronchial ultrasound elastography in diagnosis of mediastinal lymph nodes / 中国内镜杂志

ABSTRACT

Objective To evaluate the value of endobronchial ultrasound elastography in diagnosis of mediastinal lymph nodes by measuring the parameters of endobronchial ultrasound elastography. Methods Between 2016 and 2017, 46 patients with 63 lesions underwent EBUS-TBNA examination were included. Conventional ultrasound and ultrasound elastography were performed respectively to examine 63 lymph nodes before aspiration. Then various features of conventional ultrasound and parameters of ultrasound elastography were analyzed and recorded. Then evaluate the value of ultrasound elastography by pathological results and three-month follow-up data. Result The diagnostic value of ultrasound elastography image type, elasticity score, strain ratio and blue area ratio for malignant lymph nodes were higher than that of conventional ultrasound features in accuracy, sensitivity and specificity (P < 0.05); The accuracy of the boundary was the highest in the diagnosis of malignant lymph nodes. In the ultrasound elastography parameters, the accuracy of the elasticity score was the highest, and the blue area ratio had the largest area under the curve. When the boundary was used as the joint index to judge malignant lymph nodes with elasticity score and area ratio respectively, significantly higher than the diagnostic accuracy of conventional ultrasound and ultrasound elastography alone (P < 0.05). Conclusion The value of ultrasound elastography parameter in mediastinal lymph nodes diagnosis is higher than the conventional ultrasound features and a combination of both applications can improve discrimination accuracy of benign and malignant lymph nodes.