Bronchoscopy/ Endobronchial ultrasound Chi Young Jung, MD, PhD Associate professor Division of Pulmonary & Critical Care Medicine Daegu Catholic University Medical Center
Contents Bronchoscopy - diagnosis of primary tumor - staging Endobronchial ultrasound (EBUS) - EBUS-TBNA - radial probe EBUS guided TBLB
Bronchoscopy
bronchoscopy
Types of bronchoscopy Flexible bronchoscopy Rigid bronchoscopy virtual bronchoscopy
Anatomy of tracheobronchial tree
Flexible bronchoscopy Traditional white light bronchoscopy Endobronchial ultrasound (EBUS) Navigation bronchoscopy (NB) Ultrathin bronchoscopy Confocal bronchoscopy Fluorescence bronchoscopy
White light bronchoscopy
Endobronchial biopsy
Bronchial washings
Bronchial brushings
Transbronchial lung biopsy: TBLB
Transbronchial needle aspiration: TBNA
Staging Bronchoscopy is routinely performed pre-operatively : assess for synchronous lesions : delineate tumor margins Blind bronchoscopic TBNA can access lymph nodes : subcarinal (7), paratracheal (4), hilar (10)
Anatomy of tracheobronchial tree 2cm
Complication Bleeding Pneumothorax: TBLB Mild transient hypotension related to sedation Bronchospasm, hypoxemia Infection Epistaxis Cardiac arrhythmia
Endobronchial ultrasound: EBUS
Endobronchial ultrasound (EBUS)
EBUS vs EUS EBUS EUS
Types of EBUS Convex probe EBUS Radial probe EBUS
EBUS-TBNA: Indications Diagnosis & staging of lung cancer Mediastinal lymphadenopathy of unclear etiology Sampling parenchymal pulmonary nodules, endobronchial or peribronchial lesions Sampling mediastinal masses
Schematic of EBUS-TBNA
EBUS-TBNA
EBUS-TBNA
EBUS-TBNA
Advantages Minimally-invasive, safe procedure Outpatient basis Local anesthesia & conscious sedation Access a wide range of mediastinal LN & hilar LN Sample centrally located pulmonary lesions
Approaches to LNs in mediastinum
Bronchus and mediastinal structures
Diagnostic algorithm Lung mass with suspected NSCLC Imaging: CT with contrast, PET-CT Distant metastasis? No Yes Evidence of N1, N2, or N3 by CT or PET Biopsy most accessible lesion Yes No EBUS-TBNA or mediastinoscopy Large tumor with high pretest probability of nodal involvement (T1b or larger) Yes Consider EBUS-TBNA or mediastinoscopy
M/71 Cough
Chest CT scan
EBUS-TBNA adenocarcinoma
EBUS-TBNA: meta-analysis (11 studies, 1,299 patiens) 93% 100% Eur J Cancer 2009;45:1389-96.
EBUS-TBNA: meta-analysis (10 studies, 817 patiens) sensitivity specificity 88% 100% Thorax 2009;64:757-62.
EBUS-TBNA vs Mediastinoscopy Lymph Node Size in mm: Mean ± SD (Range) EBUS Yield (%) Mediastinoscopy Yield p All lymph nodes 15 ± 2.6 (10–21) 109/120 (91) 94/120 (78) 0.007 Lymph node station 2 all 16 ± 3.1 (10–21) 24/25 (96) 22/25 (88) 0.30 2 right 18 ± 1.6 (14–20) 12/13 (92) 11/13 (85) 0.99 2 left 14 ± 3.6 (10–21) 12/12 (100) 11/12 (92) 4 all 15 ± 2.6 (10–19) 45/54 (83) 40/54 (74) 0.24 4 right 29/34 (85) 24/34 (71) 0.14 4 left 16/20 (80) 7 15 ± 2.4 (10–19) 40/41 (98) 32/41 (78) Pathology Malignant 16 ± 2.7 (10–21) 64/74 (86) 49/74 (66) 0.004 Benign 15 ± 2.5 (10–21) 45/46 (98) (66 patients, 120 LNs) J Thorac Oncol 2008;3:577-82.
EBUS-TBNA/EUS-FNA vs Mediastinoscopy 79 94 Mediastinoscopy EBUS-TBNA/EUS-FNA alone Sensitivity 79% 85% JAMA 2010;304:2245-52.
EBUS-TBNA/EUS-FNA: meta-analysis (8 studies, 821 patiens) Sensitivity : 86% Specificity : 100%
Combined EBUS-TBNA & EUS-FNA Combined vs EBUS-TBNA Combined vs EUS-FNA Eur Respir J 2015;46:40-60.
Accuracy for staging of mediastium Methods Sensitivity Specificity PPV NPV CT 55 81 58 83 PET 80 88 75 91 PET-CT 62 90 63 Mediastinoscopy 81(94*) 100 91(98*) VATS 99 96 TBNA 78 77 EBUS-TBNA 89 86 EBUS-TBNA, real-time EBUS-TBNA & EUS-FNA, real-time * Mediastinal lymphadenectomy & videomediastinoscopy Chest 2013;143:e211s-50s.
Complication Hypoxemia, cough, agitation during the procedure Atrial fibrillation Bronchial edema/ hyperemia Minute bleeding Stridor Pneumothorax Hematoma Asymptomatic pneumo-mediastinum Infection: mediastinitis Puncture of the bronchoscope
Radial probe EBUS
Transbronchial lung biopsy (TBLB)
in normal aereated lung Within Radial probe EBUS Adjacent to ‘Snowstorm’ picture in normal aereated lung
Radial probe EBUS
Radial probe EBUS
F/73 pneumonia
Chest CT scan
Radial probe EBUS guided TBLB & cytology Radial probe EBUS guided adenocarcinoma
Summary EBUS-TBNA have been shown to have a good diagnostic accuracy in the diagnosis and staging of lung cancer EUBS-TBNA is technically feasible and safe procedure Combination of EBUS-TNBA & EUS-FNA is preferred over either test alone Radial probe EBUS-guided TBLB can be used for diagnosis of peripheral lung cancer