Trigeminal schwannoma

Case contributed by Melbourne Uni Radiology Masters



Patient Data

Age: 56-year-old
Gender: Female

MRI Brain

A vividly-enhancing mildly heterogenous (predominantly T1 hypointense / mildly T2 hyperintense) ovoid mass is centered within the left Meckle's cave, indenting the left cavernous sinus, sella and petrous apex.It is uncertain whether this represents a trigeminal Schwannoma or meningioma, with the former slightly favored.

The left cavernous ICA is mildly effaced/displaced, with no overt compression.

Note is made of a mildly expanded "empty sella".

The left MCA bifurcation appears mildly dilated and follow-up MRA could be used to exclude the presence of an aneurysm in this location.

The remainder of the study is unremarkable.

Case Discussion

The Imaging findings are those of a trigeminal schwannoma.

Possible Meckel's cave tumors include: 

  • trigeminal schwannoma: most common, ~33% of cases
  • meningioma
  • pituitary macroadenoma
  • metastases
  • epidermoid cyst
  • lipoma
  • base of skull tumors
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Case information

rID: 39051
Published: 25th Aug 2015
Last edited: 14th Aug 2019
Tag: rmh
Inclusion in quiz mode: Included

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