Right trigeminal neuralgia. There is a venous structure that courses along the superior aspect of the right trigeminal nerve cisternal segment, without apparent displacement of the nerve. There is no evidence of mass lesions. The inner ear structures, including the cochlea, vestibule, endolymphatic duct, and semicircular canals, appear unremarkable. The bilateral mastoid air cells and middle ears also appear unremarkable. There is a subcentimeter left nasopharyngeal retention cyst.
A venous structure courses along the superior aspect of the right trigeminal nerve cisternal segment.