In some cases, tumors in the bile ducts or pancreas are difficult to visualize by external ultrasound or CT/MRI. Endoscopic ultrasound-guided fine-needle aspiration (EUS) allows for ultrasound visualization of the area with high resolution and improved possibility for tissue sampling.
- Cancer in the liver/bile ducts
- Cancer in the pancreas
- Tissue sampling of small lesions which are not suitable for a percutaneous examination.
- Survey the relationship of the tumor to adjacent structures, for example blood vessels, focusing on operability.