• Weibo Yu, De Liang, Zhensong Yao, Haiyan Zhang, Yuanming Zhong, Yongchao Tang, Xiaobing Jiang, and Daozhang Cai.
• Department of Orthopaedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, People's Republic of China.
• Neurosurgery. 2023 Jul 1; 93 (1): 667466-74.

BackgroundEpidural cement leakage (CL) is a common complication in cement-augmented fenestrated pedicle screw fixation (CAFPSF) with the potential for neural injury. However, there are no reports discussing basivertebral vein morphology and pedicle screw placement, which are critical in the analysis of the risk of epidural CL after CAFPSF.ObjectiveTo identify the incidence and risk factors of epidural CL in osteoporotic patients during CAFPSF.MethodsTwo hundred and eighty-two osteoporotic patients using 1404 cement-augmented fenestrated screws were included. Preoperative computed tomography (CT) was used to characterize the morphology of posterior cortical basivertebral foramen. After CAFPSF, the severity of epidural CL, the implantation position of the screw tip, and cement extension within the vertebral body were determined by postoperative CT scans. In this study, significant risk factors for epidural CL were identified through logistic regression analysis.ResultsIn total, 28 patients (18.8%) and 108 screws (7.7%) had epidural CL and 7 patients (13 screws) experienced neurological symptoms. Although local epidural CL was generally not clinically significant, extensive epidural leakage posed a higher risk of neurological symptoms. Significant predictors for extensive epidural CL were a magistral type of basivertebral foramen and the smaller distance between the tip of the screw and the posterior wall of the vertebral body.ConclusionIn osteoporotic patients receiving CAFPSF, epidural CL is relatively common. The morphology of basivertebral foramen should be taken into account when planning a CAFPSF procedure. It is important to try and achieve a deeper screw implantation, especially when a magistral type of basivertebral foramen is present.Copyright © Congress of Neurological Surgeons 2023. All rights reserved.

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