Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Font Size

Endoscopic Ultrasound

Endoscopic ultrasound (EUS) is a procedure that allows a doctor to obtain images and information about the digestive tract and the surrounding tissue and organs, including the lungs. Ultrasound testing uses sound waves to make a picture of internal organs.

During the procedure, a small ultrasound device is installed on the tip of an endoscope. An endoscope is a small, lighted, flexible tube with a camera attached. By inserting the endoscope and camera into the upper or the lower digestive tract, the doctor is able to obtain high-quality ultrasound images of organs. Because the EUS can get close to the organ(s) being examined, the images obtained with EUS are often more accurate and detailed than images provided by traditional ultrasound which must travel from the outside of the body.

Recommended Related to Digestive Disorders


A splenectomy is surgery to remove the entire spleen, a delicate, fist-sized organ that sits under the left rib cage near the stomach. The spleen is an important part of the body's defense (immune) system. It contains special white blood cells that destroy bacteria and help the body fight infections when you are sick. It also makes red blood cells and helps remove, or filter, old ones from the body's circulation. If only part of the spleen is removed, the procedure is called a partial splenectomy...

Read the Splenectomy article > >

When Is Endoscopic Ultrasound Used?

Endoscopic ultrasound may be used to:

  • Evaluate stages of cancer.
  • Evaluate chronic pancreatitis or other disorders of the pancreas.
  • Study abnormalities or tumors in organs, including the gallbladder and liver.
  • Study the muscles of the lower rectum and anal canal to determine reasons for fecal incontinence (accidental bowel leakage).
  • Study nodules (bumps) in the intestinal wall.

What Happens During an Endoscopic Ultrasound?

A person undergoing an endoscopic ultrasound will be sedated prior to the procedure. After sedation, the doctor inserts an endoscope into the person's mouth or rectum. The doctor will observe the inside of the intestinal tract on a TV monitor and the ultrasound image on another monitor. Additionally the sound wave testing may be used to locate and help take biopsies (small piece of tissue to examine by microscope). The entire procedure usually takes 30 to 90 minutes and the patient usually can go home the same day of the procedure.

WebMD Medical Reference

Reviewed by Brunilda Nazario, MD on April 09, 2015

Today on WebMD

man holding his stomach
Get the facts on common problems.
blueberries in a palm
Best and worst foods.
woman shopping
Learn what foods to avoid.
fresh and dried plums
Will it help constipation?
top foods for probiotics
couple eating at cafe
sick child
Woman blowing bubble gum

Send yourself a link to download the app.

Loading ...

Please wait...

This feature is temporarily unavailable. Please try again later.


Now check your email account on your mobile phone to download your new app.

Woman with crohns in pain
Woman with stomach pain
diet for diverticulitis
what causes diarrhea