A 21-year-old woman presented with severe alcoholic necrotizing pancreatitis and was treated with maximal supportive care. Anticoagulant therapy for a superior mesenteric vein thrombosis was initiated, and ultimately she was discharged in stable condition. She was readmitted in hemorrhagic shock from retroperitoneal bleeding. Emergent laparotomy with evacuation of the hematoma and stabilization was performed. Her abdomen was left open, and a series of abdominal washouts followed. Persistent fever and tachycardia prompted CT with contrast which showed a large, maturing, left-sided collection away from the surgical site (Fig. 1A).