Pancreatic Necrosectomy
What the Examiner Expects
Removal of necrotic pancreatic and peripancreatic tissue in the setting of infected pancreatic necrosis, a life-threatening complication of severe acute pancreatitis. The examiner expects you to know that sterile necrosis is managed conservatively regardless of extent. Infected necrosis is suggested by clinical deterioration, gas in the necrotic collection on CT, or positive CT-guided FNA. The key principle is to delay intervention as long as possible (ideally > 4 weeks) to allow the necrosis to demarcate and wall off, making debridement safer and more complete. The step-up approach (PANTER trial) starts with percutaneous or endoscopic drainage, escalating to minimally invasive surgical necrosectomy (VARD) only if drainage fails.
Key Examiner Focus Points
- Indicated for infected pancreatic necrosis (walled-off necrosis with gas on CT or positive FNA)
- Delay intervention as long as possible — optimally > 4 weeks to allow demarcation
- Step-up approach: percutaneous drainage → endoscopic transgastric drainage/necrosectomy → surgical necrosectomy
- Minimally invasive techniques (VARD — video-assisted retroperitoneal debridement) preferred over open
- Open necrosectomy reserved for failure of minimally invasive approaches
Common Curveballs
Patient with pancreatic necrosis develops sepsis on day 10 with gas in the retroperitoneum
Infected necrosis. Start broad-spectrum antibiotics (carbapenems). Despite early timing, the patient needs intervention. Begin with percutaneous catheter drainage (step-up approach). Even infected necrosis should be managed with drainage first; surgical necrosectomy at 10 days is associated with very high mortality because the necrosis is not yet demarcated.
After necrosectomy, the patient develops a pancreatic fistula with persistent high-output drainage
This is common and expected. Maintain external drainage, optimize nutrition (may need TPN initially, transition to enteral via NJ tube), and octreotide. Most fistulas close over weeks to months. Persistent fistulas may require endoscopic transpapillary stenting to facilitate closure.
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