CTICasesDiaphragmatic Eventration with Zahn's Furrow
Imaging findings
Chest radiograph and CT show a sharp elevation of the anterior right hemidiaphragm with a sudden transition to normal diaphragmatic height posteriorly. On coronal and sagittal CT reconstructions, there is a distinct, deep, radiating groove on the diaphragmatic surface of the liver directly beneath a thickened, bunched muscle bundle of the eventrated diaphragm.
Key takeaways
Diaphragmatic eventration can cause diaphragmatic muscle fibers to bundle together along the shortest path between the inferior vena cava and the anterior chest wall. Increased abdominal pressure can drive this muscle bundle to create a deep groove on the diaphragmatic surface of the liver, historically termed 'corset liver' or 'Zahn's furrow,' which is a benign, pressure-related anatomical finding.
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