Fiberoptic endoscopic evaluation is a medical procedure that uses a thin, flexible tube with a light and camera, called an endoscope, to examine the inside of the body. This technique allows doctors to visualize areas such as the throat, esophagus, and stomach, helping to diagnose conditions like gastroesophageal reflux disease or tumors. During the procedure, the endoscope is gently inserted through the mouth or nose, providing real-time images on a monitor. This minimally invasive approach can also allow for tissue samples to be taken for further analysis, making it a valuable tool in gastroenterology.