CTICasesDiaphragmatic Eventration on Fluoroscopy
Imaging findings
Fluoroscopy of the chest in a patient with a moderately elevated right hemidiaphragm (predominantly involving the anterior two-thirds) demonstrates normal, active excursion of the elevated diaphragm during deep inspiration and expiration, with some restriction anteriorly but vigorous motion posteriorly.
Key takeaways
Fluoroscopic evaluation of diaphragmatic motion is helpful to distinguish diaphragmatic eventration from true paralysis. In eventration, the residual muscle (particularly at the posterior and lateral attachments) often retains normal innervation and contracts normally during respiration, whereas in diaphragmatic paralysis, the diaphragm exhibits paradoxical upward motion on inspiration (sniff test).
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