Bib Sign in Proximal Descending Thoracic Aorta Rupture on CT Angiography: Presentation of a Paradigmatic Case

Figure 5

CTA showed a focal contrast-filled outpouching (PAU) of the proximal descending thoracic aorta (green arrowhead in (e, f, and h)), associated with a ULP originating from the entrance port of the PAU (yellow arrowheads in (b–d) and red arrowhead in g, h)). Obliterated paraesophageal fat ( in (a–d)) and aortic intramural hematoma are clearly visible (yellow arrowheads in (a)). Aortic 3D volume-rendering (i) and focal detail show a bifurcated aspect of PAU (green arrowhead) and ULP (red arrowhead) union.

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