(5) Consideration for preoperative embolization is recommended for hyper-vascular tumors >3-4 cm with at least 50% of blood supply from accessible branches of the external carotid artery, in eloquent locations and with extensive calcifications.
Computed tomography angiography (CTA): Three-dimensional reconstruction of the carotid artery and three-dimensional integrated reconstruction revealed that the tumor was supplied by the bilateral external carotid artery and its branches.
The sternocleidomastoid artery is one of the five branches of the superior thyroid artery which is a branch of the external carotid artery. It can be identified because it is the only branch of the superior thyroid artery that courses laterally .
The scalp derives its blood supply mainly from the four superficial branches of the external carotid artery, the superficial temporal, angular, occipital, and posterior auricular arteries, and the supraorbital and supratrochlear branches of the internal carotid.
Intraoperatively, the mass was found to be supplied by several small vessels from the external carotid artery but without any attachment to the arterial walls (Figure B), consistent with a Shamblin Class 1 carotid body tumor.
Also the stylo-carotid syndrome is an entity of Eagle syndrome in which the internal or external carotid artery along with their peri-vascular sympathetic fibres are compressed by the enlarged/calcified styloid process.