This case involves a 59-year-old male with a past medical history significant for lung cancer. The patient underwent a left upper lung lobectomy and mediastinoscopy. Four days after being discharged from the hospital, the patient was readmitted for an acute episode of shortness of breath. A CT scan showed fluid collecting in the post-resection space with air-fluid levels in the upper portion of the lobectomy space. The patient was subsequently transferred to SICU and then to a step-down unit. A portable x-ray of the chest showed the collection of fluid completely obliterating the left lung field. In the step-down unit, the patient continued to experience difficulty breathing. He was later transferred back to ICU at which point he was unresponsive, a code was called, and the patient was intubated. Shortly thereafter a bedside thoracotomy and chest tube placement revealed dark blood in the left pleural cavity. Approximately 5000 ml of blood was evacuated from his left chest but the patient did not survive. The surgical autopsy attributed death to focal necrosis and acute inflammation with rupture of the pulmonary artery.