Chapter 93 - Part B: Megacolon Is a Neurologic Problem, Not a Stool Problem

In this BoardsCast episode, we continue Tobias Chapter 93 — Colon by deleting the most dangerous mental model in constipation medicine:megacolon is not a plumbing problem.If you treat it like a clog—more laxatives, more enemas, more fiber—you can waste critical time while the colon is literally losing the ability to contract. This episode reframes megacolon correctly: a neuromuscular failure where the “container” is broken, not just the “content.” You’ll learn:Why treating megacolon like a stool problem is dangerous (symptom treatment while the organ fails) The difference between constipation vs obstipation — and why obstipation implies loss of function The colon’s three jobs (storage, absorption, propulsion) — and which one dies in megacolon The progression from hypertrophic to dilated megacolon (compensation → irreversible failure) The failure loop: distension → reduced contractility → more distension → “dead organ” The board-critical timeline: changes are usually considered irreversible after ~6 months of dilation Primary (idiopathic) vs secondary megacolon (pelvic fractures, neurologic causes like Manx syndrome) Why cisapride, lactulose, and fiber can fail—or worsen the loop—in true megacolon Why subtotal colectomy works: removing a nonfunctional reservoir (not “unclogging”) + the ICJ tradeoff This episode teaches the shift the boards expect: stop fighting the poop—start evaluating propulsion.🎁 Simini BonusClaim your free sample of Simini Protect Lavage (just cover shipping): https://www.simini.com/evaluation-kitListen On: Spotify | Apple Podcasts | Amazon Music