Correct!
4. 1 and 3

It seems unlikely another course of antibiotics is likely to cure a clinical course and chest x-ray not consistent with pneumonia. The heart separates the anterior from the middle chest and a lesion silhouetting the heart would be located in the anterior or middle chest. The next step in her evaluation would be to perform a thoracic CT scan (Figure 3).

Figure 3.Upper panel: representative views of the thoracic CT scan in soft tissue windows (A-C) and corresponding lung windows (D-F). Lower panel: video of thoracic CT scan with soft tissue windows on left and lung windows on right.

Which of the following are true? (Click on the correct answer to proceed to the fourth of five pages)

1. There is a pericardial cyst
2. There is an anterior mediastinal mass
3. There is an esophageal mass
4. 1 and 3
5. All of the above

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