Presentation
Admission for stereotactic craniectomy and resection of cerebellopontine (CP) angle tumor. Presentation history not available.
Patient Data
CP angle lesion on post gadolinium T1w axial MRI head.
Lobulated margin with peripheral enhancement. Appears to arise adjacent to jugular foramen (NOT internal auditory canal). Extra-axial in location. CN VII, VIII are displaced but not infiltrated.
No infiltration of pons, left superior cerebellar peduncle or cerebellar lobe.
Case Discussion
This is likely to be a neurogenic tumor arising from left CN IX, X, XI rather than an acoustic neuroma. Meningioma is less likely given it does not have a broad based interface with the dura.
Other possibilities for an enhancing CP mass include: berry aneurysm, trigeminal/facial nerve schwannoma, ependymoma. Metastasis are unlikely to be extra-axial (usually parenchymal) but rarely present in this region.
The differential would also be wider if non-enhancing, hyperintense on T2w, or hyperintense on T1w. This was mostly isointense pre-contrast.
Unable to process the form. Check for errors and try again.