Brain Pathology Case of the Month - May 1998


Brain MRI showed no abnormalities within the cerebral hemispheres or basal ganglia. In the posterior fossa, small irregular subependymal hyperintensities were present on T2-weighted images at the level of the fourth ventricle (Image-01, arrow). Following the intravenous administration of gadolinium, axial T1-weighted images through the mid-pons showed contrast enhancement within the cisternal portion of the left fifth nerve (Image-02, arrow). Axial T1-weighted image at the level of the upper medulla shows contrast enhancement of both ninth nerve complexes and the stylo-mastoid portion of the right seventh nerve (Image-03, arrowhead)which is enlarged.



International Society of Neuropathology