Endoscopy procedures involve the use of a flexible tube with a camera and light, called an endoscope, to visually inspect the interior of the body's organs and structures. These procedures are commonly used for diagnostic purposes, allowing doctors to investigate symptoms, confirm diagnoses, and monitor conditions. Examples include upper endoscopy (EGD), colonoscopy, bronchoscopy, cystoscopy, and laparoscopy. They offer minimally invasive means to examine and treat a wide range of medical conditions.