CTICasesSeptal lakes
Imaging findings
Chest CT shows marked thickening of the interlobular septa with focal, nodular expansions representing fluid accumulation (septal lakes) along with ground-glass opacities, in a patient with severe cardiogenic pulmonary edema.
Key takeaways
Cardiogenic pulmonary edema can cause focal fluid accumulations in the lymphatic junctions of the interlobular septa, producing tiny nodules known as 'septal lakes.' These should not be mistaken for neoplastic or granulomatous nodules.
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