Test performance of endobronchial ultrasound and transbronchial needle aspiration biopsy for mediastinal staging in patients with lung cancer: Systematic review and meta-analysis
ABSTRACT Endobronchial ultrasound (EBUS) with transbronchial needle aspiration (TBNA) is becoming widely used for mediastinal lymph node staging in patients with known or suspected lung cancer. While a substantial number of case series have evaluated test performance of this investigation, the small sample sizes limited the ability to accurately evaluate the precision of EBUS-TBNA as a staging modality. A systematic review was performed of published studies evaluating EBUS-TBNA for mediastinal lymph node staging to ascertain the pooled sensitivity and specificity of this investigation.
A literature search was constructed and performed by a professional medical librarian to identify the literature from 1960 to February 2008. Pooled specificity and sensitivity was estimated from the extracted data with an exact binomial rendition of the bivariate mixed-effects regression model.
Of 365 publications, 25 were identified in which EBUS-TBNA was specifically focused on mediastinal node staging. Of these, only 10 had data suitable for extraction and analysis. The overall test performance was excellent with an area under the summary receiver operating characteristics curve of 0.99 (95% CI 0.96 to 1.00); similarly, EBUS-TBNA had excellent pooled specificity of 1.00 (95% CI 0.92 to 1.00) and good pooled sensitivity of 0.88 (95% CI 0.79 to 0.94).
EBUS-TBNA has excellent overall test performance and specificity for mediastinal lymph node staging in patients with lung cancer. The results compare favourably with published results for computed tomography and positron emission tomography.
- SourceAvailable from: Melissa I. Y Wickremasinghe
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- "This procedure is less invasive and can sample an increased range of lymph nodes . EBUS-TBNA has been demonstrated to be a valuable diagnostic tool in lung cancer , sarcoidosis  and tuberculosis . The accumulation of a black, carbon-containing pigment, within the airways or lungs of those exposed to coal dust, biomass smoke or air pollution is well recognized  . "
ABSTRACT: Isolated mediastinal lymphadenopathy can result from a number of potentially serious aetiologies. Traditionally those presenting with mediastinal lymphadenopathy would undergo mediastinoscopy to elucidate a final diagnosis or receive empirical treatment. There is now increased utilization of endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA), in this setting. Five cases of mediastinal lymphadenopathy are presented here in which lymph node anthracosis was identified as the primary diagnosis using EBUS-TBNA. They were female, non-smokers presenting with non-specific symptoms, who retrospectively reported cooking over wood fires. Four were from South Asia. Three were investigated by F-18-fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) scanning and increased signal was identified in the anthracotic nodes sampled. With expansion of PET/CT and EBUS-TBNA services it is likely that primary nodal anthracosis will be encountered more frequently and should be considered in the differential diagnosis of those with PET/CT positive lymphadenopathy. It may mimic pathologies including tuberculosis and malignancy, thus accurate sampling and follow-up are essential.12/2013; 10:48–52. DOI:10.1016/j.rmcr.2013.09.005
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- "Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is reported to be a safe, less invasive, and highly diagnostic procedure for nodal staging (sensitivity, 88–93%; specificity, 100%)     , and has recently become a standard modality for preoperative staging of lung cancer  . "
ABSTRACT: Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is an established modality for nodal staging in lung cancer; nevertheless, acquisition on effective fiberscope handling and puncture techniques remains challenging. Here, we present a novel EBUS-TBNA learning system protocol and evaluate the ability of physicians trained using this protocol to perform cytological diagnosis and histological sampling. We designed a 5-step learning system as follows: (1) preparation, (2) probe insertion, (3) sonographic observation, (4) TBNA assistant, and (5) TBNA operator. Each trainee must accomplish the first 4 steps before beginning step 5. In step 5, EBUS-TBNA was performed in tandem by the trainee and supervisor. Diagnostic accuracy and success of histological sampling were recorded for each trial; results of the corresponding supervisor served as a control. All 11 trainees entered step 5 after completing steps 1-4 over 5-10 trials. A total of 308 nodes were punctured in step 5. The overall accuracy of cytological diagnosis was 91.2% among trainees, and the histological sampling success rate was 85.4%. The diagnostic accuracy increased from 85.4% to 93.9% (p=0.027) after 12 needle aspiration experiences. The sizes of nodes associated with success and failure were 13.6 and 11.1mm (p=0.001), respectively. Our EBUS-TBNA learning system provided a satisfactory educational pathway for trainees and can be used to improve accessibility of EBUS-TBNA.06/2012; 50(2):46-53. DOI:10.1016/j.resinv.2012.04.002
Article: Endobronchial Ultrasound[Show abstract] [Hide abstract]
ABSTRACT: Endobronchial ultrasound (EBUS) has emerged as a routinely performed procedure in diagnostic bronchoscopy. Extending the view beyond the airway wall, EBUS provides evaluation of tumor involvement of tracheobronchial wall and mediastinum and plays an essential role as a guidance technique for peripheral pulmonary diseases. The latest development is the EBUS-transbronchial needle aspiration (TBNA) scope that allows performing real-time EBUS-TBNA of enlargerd hilar and mediastinal lymph nodes.08/2012; 1(2):69-74. DOI:10.7178/eus.02.003