What technique combines endoscopy with ultrasound?

Endoscopic ultrasound (EUS) is a specialized imaging technique that integrates the capabilities of endoscopy with those of ultrasound. This procedure involves the use of a thin, flexible tube equipped with both a light source and a camera, which is inserted into the body through the digestive tract. The ultrasound component allows for high-resolution imaging of the surrounding structures, including organs, blood vessels, and lymph nodes, by generating sound waves that produce images of these internal areas.

This technique is particularly valuable in evaluating conditions such as tumors, cysts, and other abnormalities in the gastrointestinal tract and adjacent organs, as it provides detailed information that can assist in diagnosis and treatment planning. Additionally, EUS can be used for therapeutic purposes, such as draining cysts or performing biopsies, making it a versatile tool in modern medicine.

The other options, while related to diagnostic procedures in gastroenterology, do not combine endoscopy and ultrasound in the same manner as EUS. For example, capsule endoscopy relies on ingesting a capsule that contains a camera for capturing images of the small intestine but does not use ultrasound. Esophageal motility testing measures the function of the esophagus rather than providing imaging. Echography, while related to ultrasound, does not involve an endoscopic