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Gastroenterology is the study of the digestive tract from beginning (mouth and esophagus) to the end (rectum and anus), and all organs and tissues in-between.
Gastroenterology also includes the liver, pancreas, gall bladder, and biliary tree, but this is a sub-speciality commonly referred to as Hepatology.
A gastroenterologist doctor diagnoses, treats and prevents many different digestive conditions and diseases including common ones such as indigestion, ulcers, irritable bowel syndrome and hemorrhoids, as well as other more serious cases such as colon cancer, Crohn's Disease and Diverticulitis. A GI doctor is the one who performs common preventive procedures including colon cancer screening for middle-aged men, and hemorrhoid removal for older patients.
