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Objective Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is a minimally invasive procedure for pulmonary and mediastinal diseases. This study compared the performance of a novel 19-G needle with a 21- or 22-G needle. Patients and Methods Eleven patients at Okayama Medical Center were enrolled retrospectively between April and December 2017. Enlarged lymph nodes and a pulmonary nodule were sampled with both 19-G and 21- or 22-G needles in nine patients. Two patients underwent biopsies for suspected lymphoma with only the 19-G needle. We examined their medical records on the diagnosis, size of the lymph nodes and pulmonary nodule, and complications. Results The median longest diameter of the 13 lymph nodes (8 #7, 4 #4R, and 1 #11) and 1 pulmonary nodule (right segment 6) in the 11 patients was 31.6 mm (range, 10.4-45.0 mm). Definitive diagnoses were made using the 19-G needle in nine patients. EBUS-TBNA with a 19-G needle resulted in successful diagnoses of one case of retinal hemangioblastoma, one case of tuberculous lymphadenitis, and one case of lung adenocarcinoma, as well as the evaluation of the programmed death-ligand 1 (PD-L1) expression following initial negative findings after a 21- or 22-G biopsy. A small pulmonary nodule (lung squamous cell carcinoma) with negative findings after a 19-G biopsy was diagnosed with a 22-G biopsy. Two suspected lymphoma patients were diagnosed with a 19-G needle: one had lymphoma and the other sarcoidosis. Three patients were diagnosed with sarcoidosis using both the 19-G and 21- or 22-G needles. Conclusion EBUS-TBNA with a 19-G needle was useful for diagnosing retinal hemangioblastoma and tuberculous lymphadenitis as well as for PD-L1 testing after 21- and 22-G biopsies were unsuccessful.

internal medicine

Comparing the Clinical Performance of the New 19-G ViziShot FLEX and 21- or 22-G ViziShot 2 Endobronchial Ultrasound-guided Transbronchial Needle Aspiration Needles