Fig. 2

Imaging results of ICA embolization. A Horizontal enhanced CT demonstrates a diffuse soft tissue in the left nasopharyngeal lateral wall, parapharyngeal space and retropharyngeal area. Radial artifacts of high density martix coils were noted (arrow). B Coronal enhanced MRI demonstrates enhanced nodules on the left nasopharyngeal lateral wall involving the carotid sheath space and middle skull base bone. C and D MRA shows no development of the left ICA. The left middle cerebral artery is slightly thinner than the contralateral arttery, but the cerebral artery ring is generally intact. Enhanced MRI coronal T2 (E) and horizontal T1 (F) images showed soft tissue lesions on the posterior wall of the nasopharyngeal top and the left lateral wall, involving bilateral posterior pharyngeal head longus muscle, left choanal, pteryopalatine fossa, bilateral middle skull base bone and sphenoid sinus. The left internal carotid artery showed post-embolization changes. Enhanced MRI coronal T2 (G) and horizontal T1 (H) images demonstrated that the original lesions in the left nasopharynx and middle cranial fossa had been resected. CT: computed tomography; ICA: internal carotid artery; MRI: magnetic resonance imaging; MRA: magnetic resonance angiography