During an EUS exam, a thin flexible tube with an ultrasound tip is passed through the mouth and into the esophagus, stomach and upper part of the small bowel. For evaluation of rectal tumors, the tube is passed through the anus. The ultrasound uses high-frequency sound waves to produce images of the organs and structures inside the body such as the bile duct and pancreas.
In contrast to a traditional ultrasound, during an EUS the ultrasound transducer is in close proximity to the organs of interest. As a result, images obtained through an EUS are more accurate and detailed.
Endoscopic Ultrasound Uses
- Identify and determine the severity of cancers of the esophagus, stomach, pancreas, rectum and the posterior chest wall
- Evaluate chronic pancreatitis and other masses or cysts of the pancreas
- Study bile duct abnormalities
- Examine the lining of the intestinal tract
- Examine tumors in the lining of the stomach
- Evaluate lymph nodes suspected to be involved with cancer
The entire procedure takes 30-90 minutes depending on the complexity and whether Fine Needle Aspiration is performed. If tissue or cell samples are collected and sent for analysis, results can take 48-72 hours to return.