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Endoscopic odontoidectomy for brainstem compression in association with posterior fossa decompression and occipitocervical fusion

Umberto Tosi, Alexandra Giantini-Larsen, Dimitrios Mathios, Ashutosh Kacker, Vijay K. Anand, Kiarash Ferdowssian, Ali Baaj, Roger Härtl, Benjamin I. Rapoport, Jeffrey P. Greenfield, and Theodore H. Schwartz

materials, timing and levels of occipitocervical fusion, and surgical complications were recorded. Radiographic measurements are described in detail below. All surgical procedures relied on collaboration with an experienced otolaryngologist; posterior fusion was performed by an experienced spinal surgeon. Statistical analysis was conducted with Prism 9 (GraphPad). One-way ANOVA analysis with repeated measures was carried out for continuous variables across 4 groups. When comparing radiographic measurements, we used the Student t-test with either 1 or 2 tails. The chi

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Oral Presentations 2014 AANS Annual Scientific Meeting San Francisco, California • April 5–9, 2014

Published online June 1, 2015; DOI: 10.3171/2015.6.JNS.AANS2014abstracts

decompression in surgically operated patients following anterior lumbar interbody fusion using radiographic measurement. Introduction A frequently quoted advantage for ALIF is indirect foraminal decompression although there are very few studies substantiating this statement. Also there are no clinical studies employing a standardized method to measure the foraminal area and correlating with disc height (DH) parameters. This study is proposed to measure the degree of indirect foraminal decompression radiologically using a standardized method and correlate with intervertebral

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The lateral transorbital approach to the medial sphenoid wing, anterior clinoid, middle fossa, cavernous sinus, and Meckel’s cave: target-based classification, approach-related complications, and intermediate-term ocular outcomes

Dimitrios Mathios, Ernest J. Bobeff, Davide Longo, Parsa Nilchian, Joshua Estin, Alexandra C. Schwartz, Quillan Austria, Vijay K. Anand, Kyle J. Godfrey, and Theodore H. Schwartz

eyes in these 7 patients was 3 (1–6) mm, whereas the median difference postoperatively (i.e., at 1 week to 4 months) was 0 (−1.5 to 2) mm. In cases with unavailable Hertel measurements, we used imaging-based orbital position measurements ( Supplementary Methods and Supplementary Fig. 2 ). In patients in whom both Hertel and radiographic measurements could be obtained, the interclass correlation coefficient was 0.86. Given this high correlation, we relied on imaging measurements alone when Hertel measurements were unavailable. Among these 8 patients, 7 had

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Acoustic neuroma observation associated with an increase in symptomatic tinnitus: results of the 2007–2008 Acoustic Neuroma Association survey

Clinical article

Jamie J. Van Gompel, Jaymin Patel, Chris Danner, A. Nanhua Zhang, A. A. Samy Youssef, Harry R. van Loveren, and Siviero Agazzi

suggested in this now-classic article guides intervention for patients based on radiographic measurements, we are left to wonder what we should do in the symptomatic patient? 14 Furthermore, how do we counsel a patient with symptomatic tinnitus and a tumor who is about to enter observation? This study utilizes data accumulated in the 2007–2008 ANA survey, 1 which asks patients to objectively grade their presenting symptoms (pertinent to this study, tinnitus) and compare them to their most current assessment of their tinnitus. Utilizing this data, we assessed the

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Accuracy of percutaneous placement of a ventriculoatrial shunt under ultrasonography guidance: a retrospective study at a single institution

Technical note

Philippe Metellus, Wesley Hsu, Siddharth Kharkar, Sumit Kapoor, William Scott, and Daniele Rigamonti

ventricle and connected to the shunt valve. ( Fig. 1, Step f ). The distal catheter is advanced through the tunneler from the cranial incision to the neck incision. After removing the tunneler, the distal catheter is cut by adding the distance between the neck incision and the supraclavicular margin to the clavicoatriocaval distance provided by the preoperative radiographic measurement. The stylet within the introducer is removed, and the distal catheter is advanced into the peel-away sheath introducer ( Fig. 1, Step g ). The peel-away introducer is removed ( Fig. 1

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Giant cerebral cavernous malformations: redefinition based on surgical outcomes and systematic review of the literature

Visish M. Srinivasan, Katherine Karahalios, Kavelin Rumalla, Nathan A. Shlobin, Redi Rahmani, Lea Scherschinski, Dimitri Benner, Joshua S. Catapano, Mohamed A. Labib, Christopher S. Graffeo, and Michael T. Lawton

shows the variations in sizes of the large malformations and GCCMs included in the data set. The red dashed line indicates the proposed definition of GCCM as those with a diameter ≥ 3 cm. These patients underwent radiographic measurements at multiple time points before immediate preoperative measurement, which is the rightmost data point on the graph for each line. Some lesions showed dramatic growth (e.g., patient 13), whereas others showed slower and more linear growth. In addition, lesions sometimes crossed the inflection point of 3 cm. Two patients (patients 3

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Radiographic predictors of aneurysmal etiology in patients with aneurysmal pattern subarachnoid hemorrhage

Karl Baumgartner, Aiden Meyer, Daniel Mandel, Scott Moody, Linda Wendell, Bradford B. Thompson, Thanujaa Subramaniam, Michael E. Reznik, Karen L. Furie, and Ali Mahta

specific location. Further details about these radiographic measurements can be found in our recent study. 10 To test the reliability and reproducibility of these measurements, we measured interobserver and intraobserver reliability using Cohen’s kappa coefficient. Three scans from each group were randomly chosen, and blood thickness measurements and the degree of extension into the sylvian fissure were independently measured (12 measurements per each scan; 12 × 3 × 2 = 72 total measurements). Statistical Analysis We used descriptive statistics to compare basic

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Diaphragmatic height index: new diagnostic test for phrenic nerve dysfunction

Clinical article

Chaturong Pornrattanamaneewong, Roongsak Limthongthang, Torpon Vathana, Kamolporn Kaewpornsawan, Panupan Songcharoen, and Saichol Wongtrakul

reliability of radiographic measurement, intra- and interrater reliability were assessed with an intraclass correlation coefficient. Results Study Population Standard posteroanterior chest radiographs for 220 patients with brachial plexus injury, who had undergone nerve transfers between 2005 and 2008, were retrospectively evaluated. Fifty-five patients were excluded from the study because of hemo- or pneumothorax (8 patients), pulmonary contusion (2 patients), scoliosis (9 patients), or incomplete data (36 patients). The remaining 165 patients were divided into

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IDH–wild-type glioblastoma cell density and infiltration distribution influence on supramarginal resection and its impact on overall survival: a mathematical model

Shashwat Tripathi, Tito Vivas-Buitrago, Ricardo A. Domingo, Gaetano De Biase, Desmond Brown, Oluwaseun O. Akinduro, Andres Ramos-Fresnedo, Wendy Sherman, Vivek Gupta, Erik H. Middlebrooks, David S. Sabsevitz, Alyx B. Porter, Joon H. Uhm, Bernard R. Bendok, Ian Parney, Fredric B. Meyer, Kaisorn L. Chaichana, Kristin R. Swanson, and Alfredo Quiñones-Hinojosa

selection bias extending from the inclusion criteria of IDH–wild-type GBM, first time resection, and GTR. Other limitations include the limited cohort size and influence of human error on radiographic measurements. Furthermore, the decision process to perform greater SMR in each case is unknown. In regard to the assumptions made in the model, since the presence of nonenhancing gross infiltrative tumor (as assessed by T2-weighted imaging) was uncommon in this cohort, we did not discriminate between the nonspecific FLAIR hyperintensity and solid, nonenhancing tumor

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Influence of supramarginal resection on survival outcomes after gross-total resection of IDH–wild-type glioblastoma

Tito Vivas-Buitrago, Ricardo A. Domingo, Shashwat Tripathi, Gaetano De Biase, Desmond Brown, Oluwaseun O. Akinduro, Andres Ramos-Fresnedo, David S. Sabsevitz, Bernard R. Bendok, Wendy Sherman, Ian F. Parney, Mark E. Jentoft, Erik H. Middlebrooks, Fredric B. Meyer, Kaisorn L. Chaichana, and Alfredo Quinones-Hinojosa

influence of human error on radiographic measurements. Because the cohort size was small and this study was powered for analysis of the primary outcome of OS, no multivariate analysis of PFS was conducted. We are aware of the potential effect of increased resection on functional status and the risk of new or worsened postoperative neurological deficits in patients with GBM. 45 , 46 Although this study showed no significant differences between overall preoperative and postoperative functional status in terms of KPS and Charlson Comorbidity Index, we emphasize the need for