Endoscope

An instrument for examining the interior of the body consisting of a flexible tube with lenses and optical fibers permitting illumination of the interior site to be inspected and visualization of the interior site from outside the body it often has small surgical instruments attached to the end and manipulable from the outside permitting biopsy or surgery It is used as a non invasive or minimally invasive tool for diagnosis or treatment especially in organs having an external opening such as the rectum the urethra and the bladder