Endoscopy can be used to look at the internal structures of the nose and throat as well as to diagnose disorders such as nasal polyps or cancer of the larynx. During the procedure, an endoscope is inserted up each nostril in turn and into the nasal cavity. The instrument may be flexible or rigid; flexible endoscopy is mainly used to examine the back of the throat and the larynx. Endoscopy is carried out under local anaesthesia. The procedure can be repeated easily to monitor the progress of a disorder or treatment.
From the 2010 revision of the Complete Home Medical Guide © Dorling Kindersley Limited.