781612.fig.001a
(a)
781612.fig.001b
(b)
Figure 1: MRA (a) and MRI sagittal sections (b), obtained 11 days after the initial symptoms, demonstrate the presence of a BA aneurysm with mass effect on the pons (arrowheads in (b)) and ischemic changes (not shown). At both edges of the aneurysm, stenosis of the BA is recognizable (arrows in (a)).