ABSTRACT
Objective: Four ultrasound elastography parameters were used to compare the color distribution of mediastinal and hilar lymph nodes (LNs) in endobronchial ultrasound real-time elastography (EBUS-RTE), and the clinical value in differentiating benign from malignant mediastinal and hilar lymph nodes were explored. Methods: We selected patients who received EBUS-TBNA in the Second Hospital of Lanzhou University from January 2016 to December 2018 and simultaneously conducted EBUS-RTE. Elastography of lymph nodes were analyzed by elastography image type, elasticity score, strain ratio (SR), and blue color proportion (BCP), respectively. A re-ceiver operating characteristic (ROC) curve was constructed to evaluate the diagnostic value of the four ultrasound elastography pa-rameters. The area under the curve (AUC) and the critical value of the best diagnosis were calculated, and the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of the four parameters were compared. Results: A total of 80 pa-tients were enrolled, including 152 lymph nodes with 102 malignant lymph nodes and 50 benign ones. Elastography image type, elas-ticity score, SR, and BCP had statistical significance in the differential diagnosis of benign and malignant lymph nodes (P<0.01). The ac-curacy of BCP in the diagnosis of benign and malignant lymph nodes was the highest (88.3%), and the sensitivity, specificity, positive predictive value, and negative predictive value were 90.0%, 94.1%, 85.4%, and 88.6%, respectively. The optimal definition value of BCP was 85.7%; all the 65 LNs with a BCP≥85.7% were diagnosed as malignant. Conclusions: Elastography image type, elasticity score, SR, and BCP of ultrasound elastography are important in the differential diagnosis of mediastinal and hilar lymph nodes, and BCP showed the highest diagnostic valuation.
ABSTRACT
Objective To evaluate the diagnostic value of endobronchial ultrasound-guided transbronchial needle biopsy (EBUS-TBNA) in intrathoracic tuberculosis(TB).Methods We retrospectively analyzed patients underwent EBUS-TBNA with a final diagnosis of intrathoracic TB at Shanghai Chest Hospital from October 2009 to March 2013 and observed that the diagnostic efficacy by pathology and microbiology and safety of EBUS-TBNA for intrathoracic TB.Results 75 patients were diagnosed with pulmonary TB or intrathoracic tuberculous lymphadenitis,and accuracy was 80％ (60/75) by EBUS TBNA.A total of 60 patients had pathology,acid-fast bacilli(AFB) staining and mycobacterial culture test results,of whom 52 (86.67％)were diagnosed.Pathological findings were consistent with TB in 77.33％ patients (58/75),in 20.31％ (13/64) the smear were positive for AFB and in 46.67％ (28/60) were positive for cuhure.One hundred and twenty-nine mediastinal or hilar lymph nodes and 10 intrapulmonary lesions were biopsied in 75 patients,the average target number of per patient were 1.85.Pathological findings were consistent with TB in 66.19％ samples(92/139),in 13.91％ (16/115) were positive for AFB and in 38.32％ (41/107) were positive for culture.Multivariate regression revealed that short-axis diameter was an independent risk factor associated with positive pathology,smear and euhure.Additionally,more aspiration times cause higher pathology positive rate,pathology showing necrosis and positive smear were independent risk factors associated with positive cuhure.There were two patients occurred complications during operation.Conclusion EBUS-TBNA was a safe and effective method for the diagnosis of intrathoracic tuberculosis.