Efficacy of the Third Eye Retroscope Auxiliary Imaging System

THE STUDY DEVICE: The Third Eye Retroscope is a thin, flexible probe that can be inserted in a standard colonoscope in order to display very detailed images of the colon tissue. It contains a miniature video camera that allows the doctor to see an additional point of view that looks backward while the regular colonoscope and study device are moved together through the length of the colon. For you to be eligible to take part in this study, your doctor will check to be sure you have no medical conditions that would increase your risk of having any complications as a result of having the study device used during your colonoscopy. STUDY PROCEDURES: If you are found to be eligible to take part in this study, your doctor will perform your colonoscopy exam in the usual manner except that the Third Eye Retroscope device will be used during the exam as well. Your doctor will insert the colonoscope into your rectum in the usual manner and will then insert the study device down a channel inside the colonoscope. You will sign a separate consent form for the colonoscopy, which will describe the procedure and its risks in more detail. During the exam, you will be awake. If you have chosen to use medications for conscious sedation, you will be drowsy. FOLLOW-UP PHONE CALL: About 48 hours (2 days) after the study procedure, you will be called by the research staff to see how you are doing. After this follow-up call, your participation in this study will be over. This is an investigational study. The Third Eye Retroscope device is commercially available, but it is not FDA approved for this study's purpose. At this time, for this purpose, it is being used in research only. Up to 700 patients will take part in this study. Up to 100 will be enrolled at M. D. Anderson.