This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'The most common complication after thoracic injury is: \nSelect and explain. \nA. Chylothorax, B. Pulmonary contusion, C. Empyema, D. Oesophageal rupture', 'role': 'user'}, {'content': "Answer: C \nExplanation: The most common complication after thoracic injury is development of an empyema. Management is based on CT diagnostic criteria. Percutaneous drainage is indicated for single loculations without appreciable rind. Early decoication video-assisted thoracic surgery is pursued in patients with multiple loculations or a pleural rind of >1 cm. Antibiotic treatment is based on definitive culture results. Ref: Cothren C., Biffl W.L., Moore E.E. (2010). Chapter 7. Trauma. In F.C. Brunicardi, D.K. Andersen, T.R. Billiar, D.L. Dunn, J.G. Hunter, J.B. Matthews, R.E. Pollock (Eds), Schwaz's Principles of Surgery, 9e.", 'role': 'assistant'}]