This scan combines two types of test - endoscopy and ultrasound. The operator (a doctor or nurse) uses a thin flexible tube containing a telescope (endoscope) with an ultrasound probe attached to look inside your gut (gastrointestinal or digestive tract). By putting the endoscope into the upper part of the gut, the scan can create pictures of the surrounding structures, not just inside the gut. The ultrasound probe is used to create detailed pictures of the body, including the lungs, pancreas, liver, gallbladder, oesophagus and stomach.
This is a companion discussion topic for the original article at https://patient.info/treatment-medication/endoscopic-ultrasound-scan