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Megacolon: Acute, Toxic, and Chronic.

Bharucha1, Phillips

  • 1Division of Gastroenterology and Hepatology, Mayo Clinic, 2-424 Alfred Building SMH, 200 First St. SW, Rochester, MN 55905, USA.

Current Treatment Options in Gastroenterology
|November 30, 2000
PubMed
Summary
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Megacolon, characterized by colonic dilatation, presents in acute, toxic, and chronic forms. Management strategies vary from conservative therapies and medications to surgical interventions depending on the underlying cause and severity.

Area of Science:

  • Gastroenterology
  • Colorectal Surgery
  • Internal Medicine

Background:

  • Megacolon is defined by significant colonic dilatation, specifically cecal diameter >12 cm or sigmoid colon diameter >6.5 cm.
  • It encompasses acute (Ogilvie's syndrome), toxic, and chronic forms, each with distinct etiologies and clinical presentations.

Purpose of the Study:

  • To provide a comprehensive overview of megacolon diagnosis and management.
  • To differentiate between acute, toxic, and chronic megacolon and outline appropriate therapeutic pathways.

Main Methods:

  • Review of diagnostic criteria for megacolon.
  • Discussion of treatment modalities including medical management, endoscopic procedures, and surgical options.
  • Categorization of megacolon into acute, toxic, and chronic forms for tailored treatment approaches.

Related Experiment Videos

Main Results:

  • Acute megacolon (Ogilvie's syndrome) requires exclusion of obstruction, medication review, metabolic correction, and potential decompression with neostigmine or endoscopic intervention.
  • Toxic megacolon necessitates treatment of the underlying inflammatory or infectious cause, with potential colectomy.
  • Chronic megacolon, including Hirschsprung's disease and functional constipation, is managed with surgery, biofeedback, or medical therapies.

Conclusions:

  • Effective management of megacolon hinges on accurate diagnosis of its type and underlying cause.
  • Treatment strategies range from conservative measures to emergent surgery, emphasizing the need for individualized patient care.
  • Prompt recognition and appropriate intervention are crucial for preventing complications such as perforation and improving patient outcomes.