Rectal Endoscopic Ultrasound (EUS)
The doctor uses a thin, lighted tube that bends. It's called an endoscope, or scope. The scope has an ultrasound probe and camera at the tip. The doctor gently inserts the scope into your rectum and moves it to the area to be examined. The scope can take pictures of organs and tissues to check for problems in the colon, liver, gallbladder, or pancreas.
The procedure can take up to an hour if a biopsy is done.
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