An<unk>  (looking inside) is a procedure used in medicine to look inside the body. The<unk>  procedure uses an<unk>  to examine the interior of a hollow organ or cavity of the body. Unlike many other medical imaging techniques,<unk> s are inserted directly into the organ or orifices. There are many types of<unk> es. Depending on the site in the body and type of procedure, an<unk>  is performed by an<unk> st who is typically either a doctor or a surgeon. A patient may be fully conscious or anaesthetised during the procedure. Most often, the term<unk>  is used to refer to an examination of the upper part of the gastrointestinal tract, known as an esophagogastroduodenoscopy. For nonmedical use, similar instruments are called borescopes.
Endoscopy
GI cocktail
Sialoendoscopy
Capsule endoscopy
Nasoendoscopy
Chromoendoscopy
Defecography
Autoscopy