A multiloculated cystic lesion is seen involving the pons and the brachium pontis on the left side. The lesion extends into the 4th ventricle, where a membrane is seen, differentiating it from the CSF. There is mild upstream obstructive hydrocephalus and periventricular ooze. Internal contents are seen within the cyst in the pontine region. Enhancement is seen both peripherally and within the contents.
Another small lesion, best appreciated on diffusion and FLAIR, is seen in the Sylvian fissure on the right side.
There is enhancement of the intracanalicular portion of the 7th and 8th nerve complex on the left side, possibly indicative of meningeal spread of the disease process.