Vertebral spondylolisthesis. (A) Inverted Napoleon hat sign in... | Download Scientific Diagram
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Angel Gómez-Cintrón, MD, MPH on Twitter: "Because I'm a radiology nerd and love Roentgen classic signs.... Inverted Napoleon Hat Sign. Seen on lumbar/spine AP views with L5-S1 bilateral spondylolysis and pronounced spondylolisthesis