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A resectoscope is a surgical instrument used to remove tissue from the uterus, prostate, bladder, or urethra. It is a type of endoscope, an instrument that combines a camera and instrumentation so doctors can view a surgical site and perform surgery through the same incision.
The physician inserts a long, flexible tube called a colonoscope into the patient's anus and rectum and through the colon. In addition to providing an image of the interior, the scope can also inflate the area with carbon dioxide in order to remove obscurities that prevent viewing. With the colonoscope, the doctor can also remove pre-cancerous polyps and take biopsies.