Endoscopic ultrasound (EUS) is a sophisticated imaging technique that combines endoscopy and ultrasound to obtain detailed images of the gastrointestinal tract and surrounding structures. It provides valuable information for the diagnosis and staging of various gastrointestinal diseases.

Procedure Overview: During an EUS procedure, a thin, flexible tube equipped with an ultrasound probe is passed through the mouth or anus into the esophagus, stomach, or rectum, depending on the area being examined. High-frequency sound waves emitted by the probe create precise images of the organs and nearby tissues.

Indications: EUS is used for a wide range of diagnostic purposes, including the evaluation of gastrointestinal tumors, assessment of lymph nodes, detection of pancreatic lesions, and guidance for fine needle aspiration (FNA) or biopsy procedures. It is also valuable in staging cancers and determining treatment plans.

Benefits: One of the primary benefits of EUS is its ability to provide highly detailed images of structures within the gastrointestinal tract, including those not easily visualized by other imaging modalities. It allows for accurate diagnosis and staging of diseases, leading to more effective treatment strategies.

Risks: While EUS is generally considered safe, there are some risks associated with the procedure, such as perforation of the gastrointestinal tract, bleeding, and adverse reactions to sedation. However, these complications are rare and occur in a small percentage of cases.