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Background Ten-year follow-up data from the US Food and Drug Administration investigational device exemption trial comparing BRYAN® Cervical Disc (Medtronic, Dublin, Ireland) arthroplasty to anterior cervical discectomy and fusion (ACDF) demonstrated that disc arthroplasty maintained range of motion and improvements in overall success and neck disability. Objective To compare the 10-yr rates of symptomatic adjacent level disease requiring surgery (SALDRS). Methods Prospective randomized trial data were analyzed comparing BRYAN® Cervical Disc arthroplasty to ACDF for single-level cervical disc disease with concordant radiculopathy or myelopathy with clinicoradiographic analysis at 10 yr. Secondarily, 84-mo data were pooled with PRESTIGE® Cervical Disc arthroplasty (Medtronic) study data to provide overall rates of SALDRS. Results Significantly greater overall success was maintained at every postoperative interval with an overall success rate of 81.3% with BRYAN® disc and 66.3% with ACDF (P = .005) without loss of motion preservation (8.69° vs 0.60°). Reoperation at adjacent levels up to the 120-mo visit was 9.7% in the arthroplasty group and 15.8% in the ACDF group (P = .146). The combined data from BRYAN® and Prestige ST demonstrate that BRYAN® and Prestige disc groups had a lower rate of second surgeries at the adjacent levels, up to the 84-mo visit, compared to the combined ACDF groups (6.9% vs 11.7%; P = .023). Conclusion Compared with ACDF, fewer patients with the BRYAN® disc required surgery for symptomatic adjacent level degeneration, but this did not achieve statistical significance. Analysis of combined study data using Bryan and Prestige discs shows significant differences in SADLRS as early as 7 yr.

STUDY DESIGN A retrospective cohort. OBJECTIVE The aim of this study was to describe changes in cervical alignment (CA) and cervical deformity (CD) after multilevel Schwab Grade II Osteotomies for adult spinal deformity (ASD). SUMMARY OF BACKGROUND DATA Reciprocal cervical and global changes after ASD surgery have not been previously described in the setting of multilevel osteotomy. METHODS Patients with long-segment (> five levels) fusion and osteotomy for ASD were radiographically evaluated. Pre- and postoperative cervical parameters evaluated included cervical lordosis (CL), C2-C7 sagittal vertical axis (C2-C7 SVA), and the T1 slope (T1S) minus the CL (T1S-CL). CD was defined as C2-C7 SVA >4 cm, CL

BACKGROUND Flow diversion is typically reserved for large, giant, or morphologically complex aneurysms. Coiling remains a first-line treatment for small, morphologically simple aneurysms. OBJECTIVE To compare coiling and flow diversion in small, uncomplicated intracranial aneurysms (typically amenable to coiling). METHODS Forty patients treated with the pipeline embolization device (PED) for small (

A 33-year-old immunocompetent man developed rapid visual loss and a third nerve palsy secondary to acute rhinosinusitis and intracranial abscess formation. Despite endoscopic drainage of the ethmoid and sphenoid sinuses and empiric broad-spectrum antibiotics, the patient experienced progressive visual and neurological decline and ultimately required craniotomy for drainage of an optic apparatus abscess. Although odontogenic sinusitis rarely results in abscess formation of the visual pathways, early recognition and immediate treatment is imperative to decrease the risk of profound and permanent visual impairment.

Study design Retrospective database review of a prospectively maintained neurosurgical database. Objective The surgical management of cervical spinal epidural abscesses (CSEA) is reviewed examining the shift from single to staged anteroposterior decompression and stabilization. Summary of background data CSEA management is guided by small case series. Methods A retrospective review from 1997 to 2011 was conducted for patients with the diagnostic headings: cervical epidural abscess, infection, osteomyelitis, osteodiscitis, spondylodiscitis, and abscess. Comorbidities, risk factors, surgical approach, neurologic grade, and outcomes were recorded. Results Forty consecutive patients (mean age 53 years, age range 23-74, SD ±14, 10 female) were identified with CSEA in the operative database from 1997 to 2010. Twenty one patients had a body mass index more than 25 (53%), 6 (15%) had diabetes mellitus, 6 (15%) had a prior malignancy with 2 having prior neck irradiation, and 9 (23%) used tobacco products. The most common risk factor associated with CSEA was intravenous drug abuse, found in 10 patients (25%). The most common level of discitis involvement was C6-C7 in 12 (30%) followed by C5-C6 disc in 11 (28%) and least often at C1-C2 level in 2(5%) and C7-T1 in 2(5%). The most common neurologic grades at presentation were AIS D in 20 (50%) followed by AIS E in 9 (28%). All patients received magnetic resonance imaging identifying 17 (43%) with dorsal, 12 ventral (30%), and 11 circumferential epidural abscesses (28%). The majority of patients underwent anterior followed by posterior decompression and stabilization (n = 26, 65%); 8 (20%) underwent a ventral approach and six underwent a dorsal approach (15%). Fusion was achieved in 39 of 40 (97.5%) and not significantly influenced halo use in 10 patients. Conclusions In this series, patients underwent acute evacuation and spinal cord decompression, and the shift toward staged treatment did not lead to an increased periprocedural complication rate. Level of evidence 3.

BACKGROUND: The learning and development of technical skills are paramount for neurosurgical trainees. External influences and a need for maximizing efficiency and proficiency have encouraged advancements in simulator-based learning models. OBJECTIVE: To confirm the importance of establishing an educational curriculum for teaching minimally invasive techniques of pedicle screw placement using a computer-enhanced physical model of percutaneous pedicle screw placement with simultaneous didactic and technical components. METHODS: A 2-hour educational curriculum was created to educate neurosurgical residents on anatomy, pathophysiology, and technical aspects associated with image-guided pedicle screw placement. Predidactic and postdidactic practical and written scores were analyzed and compared. Scores were calculated for each participant on the basis of the optimal pedicle screw starting point and trajectory for both fluoroscopy and computed tomographic navigation. RESULTS: Eight trainees participated in this module. Average mean scores on the written didactic test improved from 78% to 100%. The technical component scores for fluoroscopic guidance improved from 58.8 to 52.9. Technical score for computed tomography—navigated guidance also improved from 28.3 to 26.6. CONCLUSION: Didactic and technical quantitative scores with a simulator-based educational curriculum improved objectively measured resident performance. A minimally invasive spine simulation model and curriculum may serve a valuable function in the education of neurosurgical residents and outcomes for patients.

Background Neurosurgical residents have traditionally been instructed on surgical techniques and procedures through an apprenticeship model. Currently, there has been research and interest in expanding the neurosurgical education model. Objective To establish a posterior cervical decompression educational curriculum with a novel cervical simulation model. Methods The Congress of Neurological Surgeons developed a simulation committee to explore and develop simulation-based models. The educational curriculum was developed to have didactic and technical components with the incorporation of simulation models. Through numerous reiterations, a posterior cervical decompression model was developed and a 2-hour education curriculum was established. Results Individual's level of training varied, with 5 postgraduate year (PGY) 2 participants, 1 PGY-3 participant, 2 PGY-5 participants, and 1 attending, with the majority being international participants (6 of 9, 67%). Didactic scores overall improved (7 of 9, 78%). The technical scores of all participants improved from 11 to 24 (mean, 14.1) to 19 to 25 (mean, 22.4). Overall, in the posterior cervical decompression simulator, there was a significant improvement in the didactic scores (P = .005) and the technical scores (P = .02). Conclusion The posterior cervical decompression simulation model appears to be a valuable tool in educating neurosurgery residents in the aspects of this procedure. The combination of a didactic and technical assessment is a useful teaching strategy in terms of educational development.