What does the suffix '-stomy' refer to in medical terminology?

The suffix '-stomy' in medical terminology specifically refers to the surgical creation of an opening. This term is often used to describe procedures where a new opening is formed in the body to allow for the discharge of bodily waste or fluids. For instance, a colostomy involves creating an opening in the abdominal wall to divert waste into a bag for patients who have undergone surgery on their intestines.

The other choices relate to different surgical actions. A surgical incision refers to the cutting into tissue, which is distinct from creating a new opening. The surgical removal of a structure refers to the act of excising tissue or organs, whereas instrumental for cutting pertains to tools used in surgical procedures rather than the outcome of the procedure itself. Understanding these distinctions helps clarify the specific nature of procedures indicated by the suffix '-stomy.'