Correct!
4. Enhanced chest CT shows left-sided pulmonary venous occlusion
Axial enhanced chest CT shows worsening of the subpleural left lower lobe ground-glass opacity compared to previous studies, and the left pleural effusion is slightly larger than previous also. No new right lung abnormalities are evident and there is no evidence of right pleural effusion. The left superior pulmonary vein is not visualized, and the left inferior pulmonary vein is poorly enhanced, suggesting thrombosis and occlusion. There is no evidence of pulmonary arterial thromboembolic disease. No pneumothorax is identified.
Which of the following represents the most likely explanation for the patient’s waxing and waning pulmonary abnormalities? (Click on the correct answer to be directed to page 9 of 10 pages)