T4N0 adenoid cystic carcinoma of minor salivary gland/maxillary sinus with intracranial extension. There are postoperative findings related to partial left maxillectomy. There is diffuse mild left maxillary sinus mucosal thickening, with slightly more prominent infiltrative tumor involving the left maxillary alveolus, premalar subcutaneous tissue, and retromaxillary region. There is also persistent perineural tumor extension involving the left infraorbital nerve, pterygopalatine fossa, Vidian canal, foramen rotundum, foramen ovale, cavernous sinus, and Meckel cave, measuring up to 5mm in thickness, previously also 5 mm. There is no evidence of intraparenchymal extension. There is increased enhancing tumor within the medial left extraconal orbit, which measures up to 10 mm in width, previously 6 mm. There is no evidence of intracranial hemorrhage or acute infarct. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. There is no evidence of significant cervical lymphadenopathy based on size criteria. The thyroid and major salivary glands are unremarkable.
1. Post-treatment findings in the left sinonasal region with persistent perineural tumor involving the left trigeminal nerve branches with intracranial extension2. Infiltrative tumor involving the left maxillary alveolus, premalar subcutaneous tissue, and retromaxillary region appears to be slightly more prominent. 3. Increased left medial orbit extraconal tumor.4. No evidence of brain parenchymal metastases.