A 32-year-old man with a 12-year history of ulcerative colitis presents with acute onset of severe abdominal pain, fever (38.5°C), and tachycardia (HR 110/min). Abdominal examination reveals marked distension and tenderness. Plain abdominal X-ray shows a dilated colon with a maximum diameter of 8 cm. Serum albumin is 2.8 g/dL, and CRP is 85 mg/L. He has failed medical management with intravenous corticosteroids and infliximab over the past 10 days. What is the most appropriate next step in management?

Explanation

## Clinical Diagnosis: Fulminant Colitis with Toxic Megacolon ### Presentation Analysis **Key Point:** This patient has fulminant ulcerative colitis complicated by toxic megacolon — a surgical emergency requiring immediate colectomy. **High-Yield:** Toxic megacolon is defined as: - Colon diameter >6 cm on imaging - Systemic toxicity (fever, tachycardia, elevated inflammatory markers) - Failure of medical therapy - Risk of perforation (mortality >50% if perforated) ### Indications for Emergency Surgery in IBD | Indication | UC | Crohn's | Urgency | |---|---|---|---| | Perforation | Yes | Yes | Emergent | | Toxic megacolon | Yes | Rare | Emergent | | Uncontrolled hemorrhage | Yes | Yes | Emergent | | Fulminant colitis unresponsive to 7–10 days medical therapy | Yes | No | Urgent | | Obstruction (Crohn's) | No | Yes | Elective | **Clinical Pearl:** Once fulminant colitis with toxic megacolon is diagnosed and medical therapy has failed (≥7–10 days of IV steroids + biologic), further delay increases perforation risk exponentially. Cyclosporine salvage therapy is no longer standard and delays definitive surgery. ### Why Total Proctocolectomy? **Key Point:** In ulcerative colitis, total proctocolectomy is curative because the disease is limited to the colon and rectum. It eliminates all diseased tissue and the risk of recurrence. 1. Removes all diseased mucosa (UC is pancolonic) 2. Eliminates cancer risk (UC carries 1–2% annual risk after 10 years) 3. Definitive treatment — no recurrence 4. Restores continence via pouch (IPAA) in elective setting; end ileostomy in emergency **High-Yield:** In emergency fulminant colitis: - **First-stage:** Total abdominal colectomy + end ileostomy (fastest, safest) - **Later (3–6 months):** Ileal pouch–anal anastomosis (IPAA) if desired ### Why Not the Other Options? **Option A (Cyclosporine):** Cyclosporine has fallen out of favor for fulminant UC. It delays definitive surgery and carries risk of opportunistic infection without preventing perforation. **Option C (Decompressing tube):** Colonic decompression may temporize mild–moderate toxic megacolon but is contraindicated when perforation is imminent (colon >8 cm, fulminant presentation, failed medical therapy). Tube insertion risks perforation. **Option D (TPN + antibiotics):** Supportive care alone without surgery in this setting is futile. The colon is already failing; continued delay invites perforation and septic shock.