Bronchoscopy is an examination of the larger airways (trachea and bronchi) using an instrument called a bronchoscope. A bronchoscope is a type of endoscope — a flexible instrument that sees inside the body using fiberoptic technology (very fine filaments that can bend and carry light). In bronchoscopy, the doctor can look directly inside the larger breathing passages for signs of tumors and can take samples of lung fluids or tissue if necessary.
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