Endoscopy is a minimally invasive diagnostic medical procedure that is used to assess the interior surfaces of an organ by inserting a tube into the body. It is an essential diagnostic tool for pets with disorders of the gastrointestinal tract. The endoscope instrument has a built-in camera at the end of either a rigid or flexible tube, allowing for both visual inspection and photography. Many endoscopes have a channel through which biopsy or retrieval forceps may be placed to perform many different procedures including foreign body removal from the esophagus and stomach.