Asymptomatic Walled-Off Pancreatic Necrosis: A Prospective Study of Natural Course and Risk Factors for Intervention

Area of Science:

• Gastroenterology
• Pancreatic Diseases
• Surgical Gastroenterology

Background:

• Walled-off pancreatic necrosis (WOPN) is a complication of acute necrotizing pancreatitis.
• Management of asymptomatic WOPN is challenging due to unclear natural history.
• Current guidelines recommend conservative management for asymptomatic cases.

Purpose of the Study:

• To investigate the natural history of asymptomatic WOPN.
• To identify predictors of symptom development or complications requiring intervention.

Main Methods:

• Prospective observational study of 54 adult patients with asymptomatic WOPN.
• Follow-up for 12 months with clinical assessments and MRI.
• Primary outcome: proportion of patients requiring intervention for symptoms/complications.

Main Results:

• 59.2% of patients developed complications requiring intervention within 12 months.
• Larger WOPN size at baseline predicted the need for intervention (mean 9.28 cm vs 6.01 cm).
• WOPN size >5.6 cm predicted intervention need with 88.5% sensitivity.

Conclusions:

• A significant proportion of asymptomatic WOPN patients require intervention within 12 months.
• WOPN size is a key predictor of symptom development and need for intervention.