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FIG 4. A 39-year-old man with neck pain and Wallenberg's syndrome.
A, Arch aortogram shows a small left VA (arrow), whereas the right VA is not visible.
B, Contrast-enhanced MR angiogram, obtained at 2 months, shows complete recanalization of the right VA, with a fusiform pseudoaneurysm in its intradural segment (arrow).
C, Contrast-enhanced MR angiogram, obtained at 6 months, shows a normal aspect of the right VA (arrow), with a complete resolution of the pseudoaneurysm.
D, T1-weighted MR image, obtained at 9 days, shows a typical aspect of dissection of the intradural segment of the right VA with a crescentic high signal (arrow) surrounding a narrowed signal void (arrowhead).
E, T1-weighted axial MR image, obtained at 6 months, shows a spontaneous resolution of the mural hematoma of the right VA (arrow).
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