A 45-year-old man with a history of alcohol abuse presents with severe epigastric pain, fever (38.5°C), and leukocytosis (WBC 14,500/μL) for the past 6 weeks. CT scan with contrast shows a large collection in the pancreatic region with a well-defined enhancing rim, as marked **B** in the diagram. The collection measures 8 cm and is causing persistent symptoms despite conservative management. According to the Revised Atlanta Classification 2012, what is the most appropriate FIRST-LINE intervention for this collection?
A. Immediate open surgical necrosectomy
B. Observation with continued antibiotics and supportive care alone
C. Percutaneous catheter drainage (CT-guided) or endoscopic transgastric drainage with lumen-apposing metal stent
D. Minimally invasive retroperitoneal necrosectomy (VARD)
Explanation
Why Percutaneous catheter drainage (CT-guided) or endoscopic transgastric drainage with lumen-apposing metal stent is right
The structure marked B is a walled-off necrosis (WON) — a mature, encapsulated collection of necrotic pancreatic/peripancreatic tissue with a well-defined inflammatory wall that develops >4 weeks after the onset of necrotizing pancreatitis (Revised Atlanta Classification 2012). The PANTER trial (NEJM 2010) established a paradigm shift toward the "step-up approach" for symptomatic or infected WON. STEP 1 involves percutaneous catheter drainage (CT-guided) or endoscopic transgastric drainage (preferred, using lumen-apposing metal stents such as AXIOS) as the first-line minimally invasive intervention. This patient has persistent symptoms (pain, fever, leukocytosis) at 6 weeks, meeting criteria for intervention. Percutaneous or endoscopic drainage is attempted first; if clinical improvement does not occur within 72 hours, escalation to minimally invasive necrosectomy (VARD) or direct endoscopic necrosectomy (DEN) is considered.
Why each distractor is wrong
Immediate open surgical necrosectomy: Open surgical necrosectomy is now reserved for failed minimally invasive approaches and is no longer first-line. The PANTER trial demonstrated that step-up drainage reduces morbidity and mortality compared to early open necrosectomy. This outdated approach is associated with higher complications and mortality.
Minimally invasive retroperitoneal necrosectomy (VARD): VARD is a STEP 2 intervention, performed only if percutaneous/endoscopic drainage fails to achieve clinical improvement within 72 hours. It is not the first-line approach for symptomatic WON.
Observation with continued antibiotics and supportive care alone: Observation without intervention is inappropriate for symptomatic WON causing persistent pain, fever, and systemic inflammation. Active drainage is indicated when the patient has clinical signs of infection or persistent symptoms despite optimal medical management.
High-YieldNEET PG
Walled-off necrosis (WON, >4 weeks, mature wall) in necrotizing pancreatitis is managed by the step-up approach: STEP 1 = percutaneous/endoscopic drainage; STEP 2 = minimally invasive necrosectomy if no improvement in 72 hours; open surgery is last resort.
