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Radiology News


Inverted Napoleon's hat sign-Plain Film

Spondylolisthesis :  The inverted Napoleon's hat sign is produced when a severely subluxed L5 vertebral body (the dome of the hat) projects end-on and overlaps the sacrum, with the superimposition of images appearing as an inverted Napoleon hat on AP view.

Inverted Napoleon's hat sign-Plain Film Reviewed by Sumer Sethi on Friday, November 16, 2012 Rating: 5

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