Assess for vascular malformation: neck mass. There is a rather well defined multicystic mass in the left parapharyngeal and retropharyngeal spaces with minimal peripheral enhancing components. The mass measures up to 50 mm in height and spans the C2 through C6 vertebral body levels. The mass displaces the left internal carotid artery and internal jugular vein posteriorly. There is no significant cervical lymphadenopathy. The tumor indents the left thyroid lobe. The thyroid tissue and salivary glands are otherwise unremarkable. There is lack of the usual cervical lordosis. The osseous structures are otherwise intact. The patient is intubated. The orbits and imaged intracranial structures are grossly unremarkable.
A rather well defined multicystic mass in the left parapharyngeal and retropharyngeal spaces that measures up to 50 mm likely represents a macrocystic lymphatic malformation versus less likely a previously infect branchial apparatus anomaly, for example.