CTICasesAsymmetric Pulmonary Edema
Imaging findings
CT in a patient post-treatment for lung cancer demonstrates near-complete occlusion/stenosis of the right pulmonary artery. Following fluid resuscitation, CT shows asymmetric pulmonary edema and a left-sided pleural effusion, with the right lung appearing normal. The edema cleared rapidly with diuresis.
Key takeaways
Asymmetric pulmonary edema can occur after cancer therapy (such as radiation or surgery) that results in stenosis or occlusion of one pulmonary artery. When the patient experiences fluid overload, the left-to-right flow mismatch directs the hydrostatic pressure increase exclusively to the patent side (in this case, the left lung), simulating lymphangitic carcinomatosis or asymmetric infection.
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