A gastroscopy is an endoscopic procedure that examines the lining of the stomach to detect tissue abnormalities, amongst many other digestive diseases.

A gastrocopy is a procedure performed by a gastroenterologist, a well-trained subspecialist who uses the endoscopy  to diagnose and, in some cases, treat problems of the upper digestive system.

The endoscope is a long thin, flexible tube with a tiny video camera and light on the end. By adjusting the various controls on the endoscope, the gastroenterologist can safely guide the instrument to carefully examine the inside lining of the upper digestive system.