What’s the difference between an -ectomy, an -ostomy, and an -otomy? (1986)

Original Article ↗ Hacker News Discussion ↗

Core medical suffix distinctions

  • Multiple comments clarify:
    • -ectomy: cutting out and removing a structure (e.g., appendectomy, proctocolectomy).
    • -otomy / -tomy: making a cut/incision into something (e.g., craniotomy; pyloromyotomy when cutting muscle).
    • -ostomy / -stomy: creating an opening or “mouth” (stoma), often long-term (e.g., colostomy, nephrostomy).
  • One commenter says the original article slightly mis-defines “ostomy,” arguing “cut a hole” belongs to “-otomy”; others refine further that -tomy is just “cut,” not necessarily “hole.”

Greek and Latin roots / etymology

  • Greek roots explained:
    • τομή = cut/incision.
    • εκ-τομή = cut out.
    • στόμιο = mouth / mouth-shaped opening.
  • Discussion notes many operational/physiology terms are Greek, many anatomy terms are Latin.
  • Examples connecting to wider vocabulary: anatomy, tomography, entomology, dichotomy, atom.
  • Several posters mention how learning Greek/Latin roots helps decode unfamiliar terms and even boost test performance.

Common confusions and pop culture usage

  • Frequent mix-up between tracheotomy (the incision) and tracheostomy (the created opening/procedure); TV shows often just say “trach.”
  • Some joking extensions: “archaeotomy,” “tracheaectomy,” etc.

Related medical suffixes and prefixes

  • -itis: generally inflammation; not always infection. Swelling can occur with or without inflammation.
  • -osis: broadly a process or condition; sometimes associated with tissue damage (e.g., tendinosis), but another comment notes -sis as the true noun-former.
  • -opathy: pathological condition / dysfunction.
  • hyper- vs hypo-: above vs below normal levels.
  • Some humorous “-itis” coinages (e.g., “senioritis,” “dumbitis”).

Language, jargon, and communication

  • Medicine, like law and engineering, develops technical vocabularies; Greek/Latin compounds are seen as systematic rather than intentionally obscure.
  • UK clinicians are described as trained to favor plain English with patients (“tummy” instead of abdomen).
  • One commenter likens medical terminology to programming APIs: compact names encoding complex operations, though another calls that observation trivial.
  • Debate over “claustrophobic” used to describe rooms; some object on etymological grounds, others note it’s accepted modern usage.

Historical and meta points

  • The answer dates from 1986, originally tied to Usenet and/or a newspaper column, later ported to the web.
  • Some note this would suit a tabular or comic-style visualization (e.g., XKCD).

Personal experiences and humor

  • Posters mention their own surgeries (pyloromyotomy, microdiscectomy/laminotomy, total proctocolectomy with ostomy).
  • Jokes about hospital billing differences and about homeopathy as “full body dysfunction” or shared delusion.
  • Side discussion on idioms like “it’s all Greek to me” and their equivalents in other languages.