 CT NECK AND FACIAL BONES: There is a well-defined mildly enhancing 28 x 19 mm mass centered within the left masticator space abutting the medial pterygoid muscle and just anterior to the internal carotid artery. It is unchanged in size compared with the 11/14/2014 MRI and is not completely imaged on the 9/10/2014 CT making comparison with that exam difficult. There is no adjacent fat stranding or osseous destruction. There is no evidence of significant cervical lymphadenopathy. The major cervical vessels are patent. The thyroid and major salivary glands are unremarkable. There are tonsilloliths.The osseous structures are unremarkable. The airways are patent. The imaged intracranial structures are unremarkable. There are nonspecific ground glass opacities within the lung apices. There is mild mucosal thickening within the maxillary sinuses.MRA NECK: There is a separate origin of the left subclavian artery, left common carotid artery, and brachiocephalic artery from the arch. The common carotid arteries and cervical internal carotid arteries are normal in course and caliber. Both vertebral artery origins are patent. There is no evidence of flow-limiting stenosis or occlusion.
1.Well-defined 28 mm left masticator space mass without evidence for lymphadenopathy or cervical metastasis. The appearance is non-specific but most compatible with a nerve sheath tumor such as neurofibroma with a pedunculated deep parotid lobe mass felt less likely. 2.No evidence of significant steno-occlusive lesion or vascular malformation within the neck.