A 34-years old woman presented to the emergency department with complaints of acute-onset and progressive left upper quadrant abdominal and left lower chest pain, nausea, and fever since about 4 days ago; she has had a history of blunt abdominal trauma 15 years ago. On physical examination, she had fever, tachycardia, tachypnea, and left upper quadrant abdominal tenderness. Plain chest radiography showed an air-fluid level behind the heart apex and a blunted left side costophrenic angle (See Fig.
