Endoscopic Ultrasound (cont.)
In this Article
- What is Endoscopic Ultrasound (EUS)?
- When is EUS useful?
- What is the preparation for EUS?
- How is EUS performed?
- What are the risks of EUS ?
- Find a local Gastroenterologist in your town
When is EUS useful?
The uses for EUS are still being developed and, presently, it is being utilized in some of the following situations:
- Staging of cancers of the esophagus, stomach, pancreas and rectum.
- Staging of lung cancer.
- Evaluating chronic pancreatitis and other masses or cysts of the pancreas.
- Studying bile duct abnormalities including stones in the bile duct or gallbladder, or bile duct, gallbladder, or liver tumors.
- Studying the muscles of the lower rectum and anal canal in evaluating reasons for fecal incontinence.
- Studying 'submucosal lesions' such as nodules or 'bumps' that may be hiding in the intestinal wall covered by normal appearing lining of the intestinal tract.
Staging of cancer is becoming an important use of EUS. The prognosis of a cancer victim is related to the stage of the cancer at the time of cancer detection. For example, early stage colon cancer refers to cancer confined to the inner surface of the colon before it is spread to adjacent tissues or distant organs. Therefore early stage colon cancer can be completely resected with good chances for cure. However, if cancer is detected at later stages, the cancer tissues have already penetrated the colon wall and invaded neighboring organs and lymph nodes, or have spread to distant organs such as liver and lungs. Complete surgical excision becomes highly unlikely. EUS can provide information regarding the depth of penetration of the cancer and spread of cancer to adjacent tissues and lymph nodes, information useful for staging.
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