EUS is particularly useful for diagnosing and staging cancers of the gastrointestinal tract and pancreas, evaluating chronic pancreatitis, identifying bile duct stones, and assessing submucosal lesions. Additionally, EUS can facilitate fine-needle aspiration (FNA) to obtain tissue samples for biopsy, enhancing diagnostic accuracy. The procedure is minimally invasive and typically performed under sedation, ensuring patient comfort. EUS provides critical information that guides treatment decisions, making it an invaluable tool in the management of various gastrointestinal and pancreatic conditions.