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Insights into Imaging
Fig. 2 | Insights into Imaging

Fig. 2

From: The clothes maketh the sign

Fig. 2

Frontal (a) and lateral (b) radiographs of the sacrum in a 35-year-old woman with lower back pain. The subluxed L5 vertebral body projected en face overlaps the first sacral vertebra and creates the appearance of an “inverted Napoleon hat” consistent with spondylolisthesis (a). The lateral projection confirms bilateral pars defects (b, arrow). The L5 transverse processes simulate the appearance of the bicorne hat made famous by Napoleon Bonaparte in the early nineteenth century

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