Endobronchial ultrasonography (EBUS) allows visualization of the tracheobronchial
tree with real-time ultrasound and permits visualization of the internal structure
of pulmonary lesions, which may narrow the differential diagnosis. The indications
for EBUS are to (1) determine the depth of tumor invasion of tracheobronchial lesions,
(2) define positional relationships with the pulmonary artery and veins and hilar
structures and determine the extent of tumor invasion, (3) visualize paratracheal
and peribronchial lymph nodes and metastatic lesions and enable EBUS-guided transbronchial
needle aspiration (TBNA), and (4) localize and diagnose peripheral pulmonary lesions
(benign or malignant). New and evolving applications of EBUS will increase the cost-effectiveness
of EBUS in the diagnosis and treatment of thoracic diseases.
KEYWORDS
Endobronchial ultrasonography - transbronchial needle aspiration (TBNA) - depth of
tumor invasion
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Teruomi MiyazawaM.D. Ph.D.
Department of Pulmonary Medicine, Hiroshima City Hospital
7-33, Moto-machi, Naka-ku
Hiroshima, 730-8518 Japan
Email: miyazawt@carrot.ocn.ne.jp