Incidentally noted is a carotid-basilar anastomotic vessel arising from the left external carotid artery at the level of the 2nd cervical vertebral body (C2). The vessel courses dorsally and joins the left vertebral artery in the suboccipital space, with the artery then entering the foramen magnum.
There is a heterogeneous solid right nasopharyngeal soft tissue mass partially filling the nasopharyngeal and oropharyngeal airway and slightly crossing the midline leftward. This is consistent with the patient's known squamous cell carcinoma.