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Tests and procedures used to diagnose ampullary cancer include:
Passing a thin, flexible scope down your throat. Endoscopy is a procedure to examine your digestive system with a long, thin tube (endoscope) equipped with a tiny camera. The endoscope is passed down your throat, through your stomach and into your small intestine to view the ampulla of Vater.
Special surgical tools can be passed through the endoscope to collect a sample of suspicious tissue.
Endoscopy can also be used to create images. For instance, endoscopic ultrasound may help capture images of ampullary cancer.
Doctors also may inject a dye into your bile duct using endoscopy in a procedure called endoscopic retrograde cholangiopancreatography. The dye shows up on X-rays and can show blockages in your bile duct or pancreatic duct.
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