A 68 year-old female with a past medical history of diabetes mellitus, hypertension, remotely treated breast cancer and sarcoidosis presented with a 4-day history of rapidly progressive right frontal and periorbital headache, associated with right ptosis, diplopia and unsteady gait.

What is the reason for her symptoms?

Brain MRI with gadolinium: right parasellar mass extending into the cavernous sinus and Meckel’s cave without meningeal enhancement.