Endoscopic ultrasound (EUS) is a specialized technology used to examine pancreatic, stomach and esophageal tumors. It may also be used when chronic pancreatitis or hormone producing tumors are suspected. EUS is performed after an overnight fast. Sedation is given, then a special endoscope with an ultrasound probe at its tip is passed through the mouth into the esophagus, stomach and duodenum. The gastroenterologist performing the test uses ultrasound to examine any suspicious growths or other abnormalities. Needle biopsies may be taken, under direct ultrasound guidance, of enlarged lymph nodes or tumors outside the gut in the abdominal cavity or chest.
EUS is not available in Marin. We refer patients to UCSF Medical Center and to California Pacific Medical Center in San Francisco for this procedure.