Endoscopic ultrasonography (EUS) is a minimally invasive procedure that uses a small, flexible tube called an echoendoscope. The echoendoscope has a miniature ultrasound probe and uses sound waves to generate an image of the area that needs to be examined.
There are two types of EUS:
EUS allows your doctor to examine your esophagus, stomach lining, the walls of the upper and lower gastrointestinal tract, and organs near the gastrointestinal tract like the lungs, liver, gallbladder and pancreas.
Images provided by EUS are more comprehensive than other imaging tests. EUS provides detailed images of your digestive tract and other organs around it to evaluate conditions such as:
EUS can also evaluate abnormalities such as lumps or lesions, found on previous diagnostic tests, as well as help to determine the stage of certain cancers of the digestive tract and respiratory system. In some cases, EUS can be used to biopsy an abnormality to determine the best treatment option.