A 24 year-old male presents complaining of chest pain. He states that it is worse with swallowing and taking a deep breath. It is improved sitting up and leaning forward. He denies trauma, a cough and shortness of breath. Which of the following test would be most compatible with your suspected diagnosis?
A. a hiatal hernia visualized on chest x-ray
B. a normal erythrocyte sedimentation rate
C. calcified “popcorn” lesions in the lung fields bilaterally
D. diffuse ST segment elevation on his electrocardiograph
E. a widened Aa gradient on his arterial blood gas