Endoscopic Ultrasound (EUS) is a cutting-edge diagnostic and therapeutic technique that combines endoscopy with high-frequency ultrasound to obtain detailed images of the gastrointestinal wall and surrounding organs such as the pancreas, bile ducts, and lymph nodes. EUS is widely used for cancer staging, detecting pancreatic cysts, evaluating submucosal lesions, and guiding fine-needle aspiration (FNA) for tissue sampling. Its precision and minimal invasiveness make it an essential tool in modern gastroenterology.