Endoscopic ultrasound (EUS) is a procedure that can visualize and take tissue samples of lesions from many organs, including the esophagus, stomach, small and large intestines, bile ducts, pancreas, and liver. It can also help determine the stage of many cancers of the digestive system. It is performed

This procedure is used to visualize the rectum and lower part of the large intestine with a long thin flexible tube with a light and camera on it. Flexible sigmoidoscopy can be performed for a variety of reasons, including bleeding or a change in bowel habits. Patients typically prepare by taking several