This examination explores the inside of the body using an endoscope or fiberscope, inserted through a natural opening. The fibrescope or endoscope is composed of a small soft tube (only a few millimeters in diameter) in which a fibre optic is inserted. It also has a light at one end. Some fibrescopes use a small video camera and are connected to a screen. They can be fitted with surgical pliers in order to take samples for analysis and a remote control system allows it to move around once inside the body. Most fibrescopies are carried out under general anaesthetic.