Transbronchial needle aspiration (TBNA) is mainly used to obtain the core or cellular biopsy tissue from the lung lesions which are accessible by bronchoscopy. The TBNA is used to examine subclinical and parabronchial nodules as well as parenchymal abnormalities. The standard TBNA procedure uses a 21-G cytology needle or a 19-G histology needle with a flexible bronchovideo ... Read more