Endoscopy is a procedure where a thin tube with a camera and light at one end, is inserted into the body by a doctor to examine the internal organs and tissues. Endoscopy helps in detailed examination, and also helps the doctor in the diagnosis of various ailments, including cancer, which can otherwise be difficult to detect in other tests. Endoscopy is also used to perform minor surgeries. Endoscopy uses a minimally-invasive method and in some cases, helps in guided surgeries using small incisions. The camera at one end of the tube transmits images to a video monitor, through which the doctor can look at an enhanced and larger image for conducting the tests or the surgery.