What is bronchoscopy?
Bronchoscopy is a procedure that lets doctors look at your lungs and air passages.
During bronchoscopy, a thin tube (bronchoscope) is passed through your nose or mouth, down your throat and into your lungs.
Normally bronchoscopy is performed when you have persistent cough, infection and something unusual seen on a chest X-ray or other test.
Bronchoscopy can also be used to obtain samples of mucus or tissue, or to remove foreign bodies or other blockages from the airways or lungs.