A 58-year-old male current smoker presents with hemoptysis a…

A 58-year-old male current smoker presents with hemoptysis and weight loss. The physician is worried that he may have lung cancer or an infection, so she orders this chest x-ray. No nodules, masses, airspace disease, or effusions are seen. What is the next best step in this patient’s management?  

A carpenter was remodeling a house when a pneumatic nail gun…

A carpenter was remodeling a house when a pneumatic nail gun misfired, causing a 3-inch nail to discharge and penetrate his anterior chest wall. The wound was through the right 4th intercostal space in the midclavicular line. Which of the following structures was most likely pierced?