Evaluate for middle ear lesion or brain tumor: right CN V2 paresthesias. The middle ear regions appear unremarkable bilaterally. The bilateral pterygopalatine fossae, foramina rotundum, cavernous sinuses, and Meckel caves appear to be intact. A venous structure abuts the superior aspect of the cisternal segment of the right trigeminal nerve. The cisternal portions of the trigeminal nerves otherwise appear unremarkable. 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 major cerebral flow voids are intact. The orbits, skull, and scalp soft tissues are grossly unremarkable. There is moderate mucosal thickening within the right maxillary sinus.
1. No evidence of intracranial or temporal bone mass lesions. 2. A venous structure abuts the superior aspect of the cisternal segment of the right trigeminal nerve without discernible impingement of the nerve. Thus, this likely represents an anatomic variant rather than a vascular loop syndrome of trigeminal neuralgia. 3. Findings suggestive of right maxillary sinusitis. 