Bronchoscopy; drawing shows a bronchoscope inserted through the mouth, trachea, and bronchus into the lung; lymph nodes along trachea and bronchi; and cancer in one lung. Inset shows patient lying on a table having a bronchoscopy.
Bronchoscopy. A bronchoscope is inserted through the mouth, trachea, and major bronchi into the lung, to look for abnormal areas. A bronchoscope is a thin, tube-like instrument with a light and a lens for viewing. It may also have a cutting tool. Tissue samples may be taken to be checked under a microscope for signs of disease.