Loading Stack -
0 images remaining
Contrast-enhanced MRI demonstrating a well defined heterogenous and peripherally enhancing multilobulated thick-walled tumor with a small cystic center within the left cerebellopontine angle. The mass abuts the cisternal seventh and eight cranial nerves and their nerve root entry zone. This appears to have mass effect on fourth ventricle, and adjacent dural enhancement.
After MR imaging the mass was excised and histopathologic findings confirmed pilocytic astricytoma. Leptomeningeal dissemination ("drop metastases") at diagnosis is extremely rare but has been reported at time of recurrence.