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Oculomotor nerve schwannoma: MRI appearance
1Radiology Department, The University Hospital, King Abdulaziz University, PO Box 7363, 21462, Jeddah, Saudi Arabia. tersam2@yahoo.com
Clinical Imaging
|December 22, 2000
Summary
Oculomotor nerve schwannoma, a rare tumor, presents as a small mass on MRI. This imaging study details its characteristic appearance, aiding in diagnosis.
Area of Science:
- Neuroimaging
- Neurosurgery
- Oncology
Background:
- Schwannomas are benign nerve sheath tumors.
- Oculomotor nerve schwannomas are rare, posing diagnostic challenges.
Observation:
- A 5-mm mass was identified in the cisternal segment of the oculomotor nerve.
- The lesion exhibited specific signal intensities on T1- and T2-weighted MRI sequences.
Findings:
- The schwannoma was isointense on T1-weighted and hypointense on T2-weighted MRI.
- Intense tumor enhancement was observed after Gadolinium contrast administration.
Implications:
- Recognizing these MRI features is crucial for diagnosing oculomotor nerve schwannoma.
- Schwannoma should be considered in the differential diagnosis of oculomotor nerve lesions.