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as secondary to endoscopic instrumentation, sphincterotomy, or previous trauma, must be excluded. The extraction of culture allows confirming the infection of the necrotic tissue. Gram-negative bacilli are the most frequently involved bacteria (2). This entity usually requires broad-spectrum antibiotic treatment, intensive care, and debridement of infected necrotic tissue. Although percutaneous debridement may choose initially, surgical resection is still necessary in refractory cases (3).The incidence of biliary stent migration is low,