• Suganth Suppiah, Ying Meng, Michael G Fehlings, Eric M Massicotte, Albert Yee, and Mohammed F Shamji.
• Department of Surgery, University of Toronto, Toronto, Canada.
• World Neurosurg. 2016 Sep 1; 93: 20-8.

BackgroundA spinal epidural abscess is a medical emergency. Despite urgent surgical intervention and adjuvant antibiotic therapy, neurologic prognosis remains variable and guarded. The optimal approach to managing this condition is debated with substantial variability in clinical practice, dependent on patient demographic and pretreatment neurologic status as well as radiologic appearance.MethodsA systematic search in MEDLINE and similar databases was conducted for literature published from 1990 to 2015 using the search term "spinal epidural abscess", limiting the search results to human studies published in the English language. Case series that consisted of fewer than 10 patients were excluded. The evidence strength was graded according to the Grades of Recommendation Assessment, Development, and Evaluation criteria.ResultsThe search yielded 1843 patients from 34 retrospective case series. Ten studies compared surgical and medical management, with no significant difference in patients with good outcome (odds ratio, 0.65; P = 0.11) or neurologic improvement (odds ratio, 1.11; P = 0.69). However, failure rates after initial medical management requiring surgical intervention ranged from 10% to 50%. Three of 4 studies evaluating timing of surgery reported large effect sizes for neurologic outcome if early surgery was performed (P < 0.01). Other prognostic factors from a neurologic perspective included admission neurologic status, patient age, and diabetes mellitus.ConclusionsSurgery with adjuvant antibiotics remains the optimal treatment for the neurologically symptomatic patient with spinal epidural abscess. If antibiotic therapy alone is considered for the neurologically intact patient, we recommend interdisciplinary medical and surgical consultations with an in-depth dialogue on the potential for failure in isolated medical management and the recommendation for close neurologic monitoring.Copyright © 2016 Elsevier Inc. All rights reserved.

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