Fig. 1

MRI of the brain shows gadolinium-enhancement along the brainstem, cerebellum, occipital and temporal sulci (A and C before treatment), which decreased during the course (B and D ten days after). T2-hyperintesities could be detected in the brainstem up to the diencephalon (primarily thalamus and parts of the capsula interna on both sides). E shows the MRI before start of treatment, F four months after. G shows MR-TOF angiography with distal ACI stenosis on the left, H 4 months later (arrows). A, B axial T1; C, D coronal T1; E, F axial T2; G, H MR-TOF angiography