Many surgical procedure names can be broken into parts to indicate the meaning. For example, in gastrectomy, "ectomy" is a suffix meaning the removal of a part of the body. "Gastro-" means stomach. Thus, gastrectomy refers to the surgical removal of the stomach (or sections thereof). "Otomy" means cutting into a part of the body; a gastrotomy would be cutting into, but not necessarily removing, the stomach. In addition, "pharyngo" means pharynx, "laryngo" means larynx, "esophag" means esophagus. Thus, "pharyngolaryngoesophagectomy" refers to the surgical removal of the three.
The field of minimally invasive surgery has spawned another set of words, such as arthroscopic or laparoscopic surgery. These take the same form as above; an arthroscope is a device which allows the inside of the joint to be seen.