Simini Boards Cast

Chapter 86 - Part A: The Peritoneum Is Not a Space: Why Fluids, Infection, and Cancer Spread the Way They Do

Simini Podcasts Season 1 Episode 66

In this BoardsCast episode, we open Tobias Chapter 86 – Peritoneum & Retroperitoneum and reframe the peritoneum not as an “empty space,” but as a dynamic, vascular, absorptive surface that determines how fluid, infection, inflammation, and cancer move through the abdomen.

Understanding this concept transforms how you interpret peritonitis, effusion, neoplasia, and surgical contamination — and explains why abdominal disease behaves the way it does.

You’ll learn:

  • Why the peritoneum acts like a giant sponge, not a container
  • How fluid moves across peritoneal surfaces (and why it accumulates)
  • How infection spreads in predictable patterns
  • Why cancer “seeds” the abdomen instead of forming single masses
  • The difference between transudate, modified transudate, and exudate
  • Why retroperitoneal disease behaves completely differently
  • Board-relevant patterns in septic vs non-septic peritonitis

This episode gives you the physiologic foundations needed to understand almost every abdominal disease process.

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