A special form of endoscopy called endoscopic retrograde cholangiopancreaticography, or ERCP, allows pictures of the pancreas, gallbladder, and related structures to be taken. ERCP is also used for stent placement and biopsies. Endoscopic ultrasound or EUS combines upper endoscopy and ultrasound examination to obtain images and information about various parts of the digestive tract. Why Do I Need an Endoscopy? Doctors will often recommend endoscopy to evaluate: Stomach pain; Ulcers, gastritis, or difficulty swallowing
dys-. a combining form meaning âill,â âbad,â used esp. to form words denoting impaired or abnormal biological or mental processes: dyslexia; dysplasia. zer-, Old Norse tor-, Skt dus- ]. 1  Facebook.
A bitter taste in the mouth that is not from a bitter substance is a distorted sense of taste. A persistent bad taste in the mouth, whether bitter, metallic or foul, is called dysgeusia. A lack of, or change in, taste often occurs when something interferes with the normal taste process. Your sense of taste and the flavors you perceive are the result of a combination of the sense of smell and sensory neurons in your taste buds, which tell the brain what substances you taste.