Miniforceps EBUS-guided lymph node biopsy: impact on diagnostic yield.
INTRODUCTION
Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is the standard diagnostic method for sampling mediastinal and hilar lymph nodes. Non-diagnostic samples have led some pulmonologists to add a miniforceps biopsy (EBUS-TBFB) in order to increase diagnostic yield. Our study aims to analyze the impact of adding EBUS-TBFB to the EBUS-TBNA in cases where Rapid On-site Evaluation (ROSE) was negative for malignancy or was non-diagnostic.


MATERIAL AND METHODS
This retrospective chart review included 91 patients who were aged 18-90 years old and underwent EBUS with both TBNA and TBFB between January 1, 2013 and July 1, 2018.


RESULTS
There was no significant statistical difference in the diagnostic yield of TBNA vs TBFB with a McNemar value of 0.167, and this conclusion was the same when stratified by race, age and lymph node size. Using TBNA as a gold standard, the sensitivity and specificity of TBFB was 87% and 69%, respectively. Out of the non-diagnostic TBNA samples on ROSE and cell-block, subsequent TBFB resulted in additional pathologic diagnoses in 16% of cases, of which 67% were non-caseating granulomas. Furthermore, two additional malignant cases were identified by TBFB consisting of small cell carcinoma and non-Hodgkin's lymphoma.


CONCLUSION
In conclusion, TBFB is a useful adjunctive tool in the diagnosis of non-malignant conditions (i.e. granulomatous diseases) with the potential to spare the patient from more invasive surgical biopsies. Training of future fellows in performing TBFB in addition to TBNA should be strongly encouraged.
['Shiari|Aryan|A|0000-0002-6707-5029', 'Aljundi|Lamia|L|', 'Boshara|Peter|P|', 'Zein|Rami|R|', 'Zalt|Mohammad|M|']
D000293:Adolescent D000328:Adult D000368:Aged D061765:Endoscopic Ultrasound-Guided Fine Needle Aspiration D005260:Female D005500:Follow-Up Studies D006099:Granuloma D006801:Humans D008198:Lymph Nodes D008297:Male D008482:Mediastinum D008875:Middle Aged D009361:Neoplasm Invasiveness D012189:Retrospective Studies D012680:Sensitivity and Specificity D055815:Young Adult
EBUS-TBNA EBUS-TBFB Rapid On-site Evaluation ROSE sarcoidosis