Adenoid cystic carcinoma of the right parotid gland (T4aN0), underwent right total parotidectomy and a right selective neck dissection with a rotational skin flap closure on 2/16/12. There are partially imaged findings related to right parotidectomy without definite evidence of mass lesions in this region. There is unchanged nonspecific enhancement in the left petrous apex region. Otherwise, there is no evidence of intracranial hemorrhage, mass, or acute infarct. The cavernous sinuses appear to be intact, albeit mildly asymmetric. There are a few scattered nonspecific foci of cerebral white matter T2 hyperintensity. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. There is persistent fluid signal within the right mastoid air cells. There is mild scattered paranasal sinus mucosal thickening. There are bilateral lens implants. There is a right maxillary periapical cyst. There is an unchanged 8 mm diameter left parotid cystic lesion. There is diffuse T2 hyperintensity and enhancement in the left masticator muscles. There are left temporomandibular joint degenerative changes.
1. Stigmata of denervation effects in the left trigeminal nerve distribution.2. Unchanged subcentimeter cyst lesion in the left parotid gland without evidence of associated enhancing mass, although the images are not optimized for assessment of this region.3. Postoperative findings related to right parotidectomy without discernible evidence of gross tumor, although this region is incompletely imaged.4. Persistent nonspecific enhancement in the left petrous apex region.5. Left temporomandibular joint degenerative changes. 