Procedures performed with an ENDOSCOPE passing through a natural opening in the body such as the mouth, nose, urethra, or anus and along their natural body pathways; and then through an internal incision in the wall of the tubular structure or organ such as the stomach, bladder, or intestines, thus avoiding any external incisions through the skin.

Surgical procedures performed through a natural opening in the body such as the mouth, nose, urethra, or anus, and along the natural body cavities with which they are continuous.

Synonyms: Natural Orifice Transluminal Endoscopic Surgery, Natural Orifice Endoscopic Surgery, Natural Orifice Transluminal Endoscopy