Gastroenterology is the medical specialisation that focusses on the disorders related to the digestive system. The digestive system includes the esophagus, stomach, small and large intestines, pancreas, gallbladder, bile ducts, and liver. 

Gastroenterologists diagnose and treat a wide range of conditions, from common issues like heartburn and ulcers to more serious diseases like inflammatory bowel disease and liver disease. 

Some diseases under the scope of Gastroenterology are, gastroesophageal reflux disease (GERD), peptic ulcers, inflammatory bowel diseases (Crohn’s and ulcerative colitis), liver diseases (hepatitis, cirrhosis), pancreatitis, and cancers of the digestive system.

Gastroenterology includes the use of endoscopic procedures like colonoscopies and upper endoscopies to diagnose and treat conditions. 

Gastroenterology plays a vital role in the screening of conditions like colon cancer, thereby can be prevented by detection and intervention.