Endoscopic ultrasound (EUS) is a minimally invasive procedure that combines endoscopy and ultrasound imaging technology to examine the digestive tract and surrounding organs. The endoscope is inserted into the body, allowing the doctor to view the digestive tract and obtain high-quality images of the surrounding structures using ultrasound. EUS is commonly used to diagnose and stage gastrointestinal cancers, evaluate abnormalities in the pancreas, liver, gallbladder, and bile ducts, as well as guide fine needle biopsies for obtaining tissue samples for further analysis. It is a valuable tool in gastroenterology and oncology for diagnosing and treating a variety of conditions. Overall, EUS has revolutionized the field of gastroenterology by providing a less invasive and more accurate means of visualizing and diagnosing diseases in the digestive system and nearby organs.