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A bony defect is present through the ventromedial aspect of the right middle cranial fossa, through which meninges and distorted brain protrude (meningoencephalocoele), into the lateral aspect of the right side of the sphenoid sinus.
Ancillary findings of intracranial hypertension are also present: empty pituitary fossa, prominent optic nerve sheaths and bilateral distal transverse sinus stenosis.