Presentation
Retro-orbital headache.
Patient Data
Age: 54
Gender: Female
From the case:
Enhancing 5th cranial nerve
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Enhancing right trigeminal nerve as it courses through the skull base at foramen rotundum.
Case Discussion
Unfortunately we do not know the diagnosis yet, but it is a good example of perineural enhancement.
The differential to consider would be perineural tumor spread from a head and neck tumor eg squamous cell carcinoma or lymphoma.