A 72 year male presents to the emergency department with facial and periorbital soft-tissue swelling and associated increased shortness of breath. Family states was just discharged from the hospital yesterday after having a left sided pneumonectomy last week and began having dyspnea and swelling around his face, neck and upper chest. His vital signs are stable although his oxygen saturation on room air is 91% and breath sounds are absent on the left.
You obtain a chest x-ray.
1. What does this chest x-ray reveal?
2. What radiologic sign is present?
3. What may also be present on physical exam?