Endoscopic ultrasound allows your doctor to examine the stomach lining as well as the walls of the upper and lower gastrointestinal tract. The upper tract includes the esophagus, stomach, and duodenum; the lower tract includes the colon and rectum. EUS is also used to study internal organs that lie next to the gastrointestinal tract, such as the gall bladder and the pancreas. Your physician will insert a thin, flexible tube (endoscope) that has an ultrasound probe at the tip through your mouth or rectum depending on the area being examined. Once the endoscope is passed through the mouth or the rectum the physician will turn on the ultrasound probe, which will produce sound waves that create visual images of the digestive tract and/or internal organs.
Endoscopic ultrasound surpasses other imaging tests by providing the physician with more information and a more detailed picture. This procedure can be used to diagnose the cause of a condition, such as abdominal pain or confirm a diagnosis. Endoscopic ultrasound also has the ability to evaluate abnormalities that are found.
Endoscopic ultrasound can also be used to evaluate cancers of the digestive and respiratory systems. The procedure enables the physician to determine the stage of the cancer and whether it has spread to other areas.