Correct!
3. Thoracic CT scan

His course is not as expected. Usually pulmonary edema responds well to diuresis and it seems unlikely that switching diuretics would be helpful. Repeating his PSA would probably also not be helpful since it is known to be quite high. A thoracic CT scan was performed (Figure 3).

Figure 3. A-D: Thoracic CT scan with contrast from present admission. E-H: Thoracic CT from admission 4 months earlier for comparison.

1. The interstitial prominence has increased
2. There are multiple pulmonary emboli
3. The pleural effusions have decreased in size
4. 1 and 3
5. All of the above

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