Management of Necrotic Pancreatic Pseudocyst

Diagnosis and Initial Assessment

The American Gastroenterological Association recommends differentiating between simple pseudocyst and walled-off necrosis (WON) using EUS or MRI, as necrotic collections contain solid debris requiring more aggressive management 2, 3
Walled-off necrosis refers to a mature, encapsulated collection of pancreatic and/or peripancreatic necrosis with a well-defined inflammatory wall, typically occurring >4 weeks after onset of pancreatitis 1
When infection is suspected in a necrotic collection, CT-guided fine-needle aspiration should be performed for culture and Gram stain to document infection 2, 4

Infected necrosis (confirmed by positive cultures or strong clinical suspicion with gas in collection, sepsis, or clinical deterioration) is an indication for intervention, according to the American College of Gastroenterology 1
Symptomatic collections causing pain, gastric outlet obstruction, biliary obstruction, or persistent systemic inflammatory response are indications for intervention 1
Ongoing organ failure without signs of infection (after 4 weeks) is an indication for intervention 1
Growing collections or disconnected pancreatic duct syndrome are indications for intervention 1

The American Gastroenterological Association recommends tailoring antibiotic therapy based on culture results from fine-needle aspiration 2, 4
Limit antibiotic prophylaxis to patients with substantial pancreatic necrosis (>30% of gland) and continue for no more than 14 days 2, 4
Enteral feeding should be initiated early to decrease risk of infected necrosis, and nasojejunal tube feeding with elemental or semi-elemental formula should be used if oral feeding is not possible 5
Total parenteral nutrition should be reserved only for patients unable to tolerate enteral nutrition 5

Patients with infected necrosis should be managed in centers with specialist expertise in endoscopic, radiologic, and surgical management, according to the European Society of Gastrointestinal Endoscopy 2, 6
Simple drainage procedures without debridement of necrotic material may predispose to infection when pancreatic necrosis is unrecognized 2, 4
Percutaneous drainage alone has limited success (14-32% cure rate) for definitive treatment of necrotic collections 1
Evaluate main pancreatic duct status, as complete occlusion central to the pseudocyst may lead to failure of percutaneous drainage 1

Conservative management may be appropriate for small (<5cm), stable, and sterile pseudocysts, according to the American College of Gastroenterology 1