Fig 3

Volumetric helical CT data set reformatted for 3D bone surface shadow rendering as viewed from the left oblique clearly showing the elongated styloid process (A) on the left and ossification of the stylohyoid ligament (B). The elongated styloid process traverses immediately lateral to the internal jugular vein and to the cervical internal carotid artery but does not have significant mass effect on the cervical internal carotid artery. The branches of the external carotid artery are immediately lateral to the ossified stylohyoid ligament between the cervical segments of the internal and external carotid arteries, also exhibiting no significant mass effect on these vessels in neutral position.