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Updated: Dec 20, 2025

Permanent Cerebral Vessel Occlusion via Double Ligature and Transection
Published on: July 21, 2013
Paracondylar process combined with persistent first intersegmental vertebral artery: an anatomic case report and
Haigui Yang1, Xiaofei Bai1, Xiaoli Huan1
1Department of Neurosurgery, Yan'an People's Hospital, Yan'an, China.
Abstract:
The paracondylar process (PCP) and the persistent first intersegmental vertebral artery (PFIA) are both rare variations at the craniovertebral junction. We report the above two variations coexisting in one cadaveric head during the training of far lateral approach in our skull base lab. The specimen simultaneously had a left occipitalized atlas associated with a PFIA and a right PCP. The previous reports, the embryogenesis, and the clinical implications of the two variations were also reviewed. Preoperative recognition of the rare variations is essential to a safe far lateral approach.
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