Nasopharyngeal adenoid cystic carcinoma status post radiation therapy. There is no significant interval change in size of the enhancing perineural tumor in the left parapharyngeal space along the V3 segment of the left trigeminal nerve into the left cavernous sinus, measuring up to 6 mm in thickness. The left foramen rotundum and pterygopalatine fossa appear unchanged. There is an unchanged defect in the left greater with of the sphenoid with associated enhancement in this area. There is diffuse atrophy and T2 hyperintensity of the left optic nerve. The right orbital contents are unremarkable. There is persistent left otomastoid fluid and mucosal enhancement. There is a gradually enlarging tubular T2 hyperintense lesion in the right retromaxillary fat pad, with what may represent associated enhancement. There is mild mucosal thickening within the atelectatic left maxillary sinus.
1. No significant interval change in the appearance of the treated perineural tumor related to nasopharyngeal adenoid cystic carcinoma involving the left trigeminal nerve.2. Unchanged nonspecific defect in the left greater with of the sphenoid with enhancement, which may be vascular rather than neoplastic in nature.3. Diffuse left optic nerve atrophy.4. Findings suggestive of left Eustachian tube dysfunction.5. A gradually enlarging tubular T2 hyperintense lesion in the right retromaxillary fat pad, with what may represent associated enhancement, may represent a peripheral nerve sheath tumor, for example.