Case #2a
Lateral internal carotid angiogram
The persistent stapedial artery arises from the proximal internal carotid artery and ends as the middle meningeal artery.
Case #1b
AP internal carotid angiogram
The origin of the persistent stapedial artery from the proximal intracranial internal carotid is again seen. The persistent stapedial artery continues as the middle meningeal artery. The middle meningeal artery lacks its characteristic curve as it does not enter the skull base in the usual fashion.