An endoscope is a long, thin tube with a light and a camera on one end. A doctor passes it through the mouth to look at the lining of the esophagus and stomach. In liver care, the main goal is to find varices: dilated veins in the esophagus or stomach.
Varices form because of portal hypertension, which means high pressure in the portal vein. This vein carries blood from the digestive organs to the liver. Cirrhosis, or scarring of the liver, is the most common cause in adults. When scarring blocks blood flow, the body builds new veins to go around the liver. These veins are weaker than normal veins and can rupture and bleed.
Endoscopy looks at the esophagus and stomach, not at the liver itself. Doctors use it alongside blood tests, imaging, and sometimes a liver biopsy to understand how far liver disease has progressed and what risks you face.
This group currently has one detailed guide: upper endoscopy (EGD) for esophageal varices.