A 35-year-old man comes to the physician for a 1-day history of sharp, stabbing pain in the left lateral chest. The pain resolved spontaneously on its own after 30 minutes, but has recurred five more times. Three days ago, he had a sore throat and headache. Vitals are within normal limits. Cardiac examination, chest x-ray, and ECG are all normal. Laboratory studies show elevated creatine kinase. Which of the following is the most likely explanation for these findings?
Empyema
Pericarditis
Pleurodynia
Pneumothorax
Pulmonary embolism
Tamponade
