Endoscopic Ultrasonograpy (EUS)

Diagnostic EUS

A tiny ultrasound transducer incorporated at the tip of the endoscope generates high-frequency sound waves, enabling the endoscopist to see into the bowel wall and look at surrounding organs such as the pancreas and bile duct with high spatial resolution.

Interventional EUS

Interventional EUS applications include fine needle aspiration biopsy, pseudocyst puncture and drainage, and celiac ganglion blockade.



Echoendoscope used to perform interventional procedures. A biopsy needle projects from the instrumentation channel.



Needle entering into a pancreatic mass to obtain tissue for sampling.

Paul May & Frank Stein Interventional Endoscopy Center

The Paul May & Frank Stein Interventional Endoscopy Center in San Francisco features some of the top-rated gastrointestinal disease doctors and interventional endoscopy specialists in the San Francisco Bay Area, Marin county and Northern California who use the most successful non-surgical treatment options available.