Right trigeminal neuralgia evaluate for demyelination or vascular compression. A venous structure appears to impress upon the inferior aspect of the root entry zone of the right trigeminal nerve, while the posterior cerebral artery abuts the superior aspect of the root entry zone of the right trigeminal nerve. There is no evidence of intracranial hemorrhage, mass, or acute infarct. The brain parenchyma and pituitary gland appear unremarkable. There is no abnormal intracranial enhancement. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.
1. A venous structure appears to impress upon the inferior aspect of the root entry zone of the right trigeminal nerve, while the posterior cerebral artery abuts the superior aspect of the root entry zone of the right trigeminal nerve, which may represent a vascular loop syndrome. 2. No evidence of demyelinating or mass lesions.