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NCI Dictionary of Cancer Terms


endoscopic ultrasound  listen  (en-doh-SKAH-pik UL-truh-sownd)

  A procedure in which an endoscope is inserted into the body. An endoscope is a thin, tube-like instrument that has a light and a lens for viewing. A probe at the end of the endoscope is used to bounce high-energy sound waves (ultrasound) off internal organs to make a picture (sonogram). Also called endosonography and EUS.