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https://www.readbyqxmd.com/read/28546119/posterior-bilateral-intermuscular-approach-for-upper-cervical-spine-injuries
#1
Yong Xu, Wei Xiong, SungⅡ Han, Zhong Fang, Feng Li
OBJECTIVE: To investigate a novel intermuscular surgical approach for posterior upper cervical spine fixation. METHODS: Twenty three healthy volunteers underwent MRI imaging. By using the MRI scans in transverse view at the level of lower edge of atlas, the distances from the posterior midline to lateral margin of trapezius (0-T), to the medial margin of splenius capitis (0-Spl), and to middle line of semispinalis capitis (0-Sem) were recorded. The angle between posterior middle line and the line crossing the lateral margin of trapezius and middle point of ipsilateral pedicles...
May 22, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28540074/imaging-for-surveillance-and-operative-management-for-endovascular-aortic-aneurysm-repairs
#2
REVIEW
Christopher Lau, Dmitriy N Feldman, Leonard N Girardi, Luke K Kim
Endovascular aortic aneurysm repairs rely heavily on radiologic imaging modalities for preoperative surveillance, intraoperative management, and postoperative follow-up. Ultrasonography, computed tomography (CT), magnetic resonance imaging (MRI) and angiography all have utility at different stages of management. Often one imaging modality compliments another by providing supplementary information. Data from the imaging exams must be synthesized into one coherent plan for managing patients with aortic aneurysms...
April 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28533989/iatrogenic-spinal-subdural-extra-arachnoid-hygroma-following-uncomplicated-lumbar-decompression
#3
Benjamin D Elder, Wataru Ishida, Rory C Goodwin, Ali Bydon
Intradural spinal arachnoid cysts (ISACs) have been reported in the current literature as either an idiopathic disease or exceedingly rare sequelae after lumbar puncture, spinal trauma, or meningitis. Other studies have more appropriately termed the iatrogenic pathology as a spinal subdural extra-arachnoid hygroma (SSEH), as there is not often a clear cyst wall as in a true arachnoid cyst. However, to the best of our knowledge, none of the previous studies described an SSEH following uncomplicated posterior lumbar surgery, as they have previously involved clear durotomies during the initial operation...
April 17, 2017: Curēus
https://www.readbyqxmd.com/read/28531270/utilization-of-quantitative-susceptibility-mapping-for-direct-targeting-of-the-subthalamic-nucleus-during-deep-brain-stimulation-surgery
#4
Jonathan Rasouli, Ritesh Ramdhani, Fedor E Panov, Alexey Dimov, Yan Zhang, Catherine Cho, Yi Wang, Brian Harris Kopell
BACKGROUND: Deep brain stimulation of the subthalamic nucleus (STN) has demonstrated efficacy in improving motor disability in Parkinson's disease. The recently developed quantitative susceptibility mapping (QSM) technique, which can accurately map iron deposits in deep brain nuclei, promises precise targeting of the STN. OBJECTIVE: To demonstrate the use of QSM to target STN effectively by correlating with classical physiological-based targeting measures in a prospective study...
May 21, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28528897/lateral-lumbar-interbody-fusion-at-the-lumbosacral-junction
#5
Timothy L T Siu, Kainu Lin
Due to the obstruction of the iliac crest and the retroperitoneal vessels, lateral lumbar interbody fusion (LLIF) is generally considered contraindicated at the lumbosacral junction (LSJ). In particular the 'rise' of the psoas from the vertebral column in the lower lumbar segments has been associated with significant overlap of the lumbar plexus with the vertebral body and exclusion of a safe transpsoas entry. However in selected individuals anatomical variations may help circumvent the difficulties and the anatomical corridor posterior to the lumbar plexus may provide an alternative to the conventional anterior approach...
May 18, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28528267/using-mri-to-non-invasively-and-accurately-quantify-preoperative-hepatic-steatosis
#6
Callisia N Clarke, Haesun Choi, Ping Hou, Catherine H Davis, Jingfei Ma, Asif Rashid, Jean-Nicolas Vauthey, Thomas A Aloia
BACKGROUND: The obesity epidemic has significantly increased the incidence and severity of hepatic steatosis in liver surgery patients and liver donors, potentially impacting postoperative liver regeneration and function. Development of a non-invasive means to quantify hepatic steatosis would facilitate selection of candidates for liver resection and transplant donation. METHODS: An IRB-approved protocol prospectively enrolled 28 patients with liver tumors requiring hepatic resection...
May 17, 2017: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
https://www.readbyqxmd.com/read/28521346/real-time-magnetic-resonance-imaging-guided-biopsy-using-smartframe%C3%A2-stereotaxis-in-the-setting-of-a-conventional-diagnostic-magnetic-resonance-imaging-suite
#7
Justin K Scheer, Thomas Hamelin, Leon Chang, Brian Lemkuil, Bob S Carter, Clark C Chen
BACKGROUND: Real-time magnetic resonance imaging (MRI) visualization during stereotactic needle biopsies affords several valuable benefits to the neurosurgeon, including the opportunity to visually confirm the biopsy site at the time of surgery. Until now, reported experiences with this technique have been limited to the setting of intraoperative MRI or dedicated procedural MRI suites with modified ventilation systems. OBJECTIVE: To describe our experience with 11 consecutive patients who underwent real-time MRI-guided biopsy performed using SmartFrame® stereotaxis (MRI Interventions, Irvine, California) in the setting of a conventional diagnostic MRI suite...
June 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28520678/anterior-cruciate-ligament-injury-at-the-time-of-anterior-tibial-spine-fracture-in-young-patients-an-observational-cohort-study
#8
Meredith H Mayo, Justin J Mitchell, Derek P Axibal, Jorge Chahla, Claire Palmer, Armando F Vidal, Jason T Rhodes
BACKGROUND: Anterior tibial spine fractures (ATSF) in the skeletally immature parallel anterior cruciate ligament (ACL) tears in adult patients, yet these injuries are generally regarded as mutually exclusive. Biomechanical analysis suggests that intrinsic ACL damage occurs during ATSF, and long-term clinical studies demonstrate residual anteroposterior knee laxity following ATSF. We aim to describe prevalence, demographics, and characteristics of pediatric patients who sustained ATSF with concomitant ACL injury...
May 17, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28520461/clinical-outcome-after-arthroscopic-debridement-and-microfracture-for-osteochondritis-dissecans-of-the-capitellum
#9
Rens Bexkens, Kim I M van den Ende, Paul T Ogink, Christiaan J A van Bergen, Michel P J van den Bekerom, Denise Eygendaal
BACKGROUND: Various surgical treatment techniques have been developed to treat capitellar osteochondritis dissecans; however, the optimal technique remains the subject of ongoing debate. PURPOSE: To evaluate clinical outcomes after arthroscopic debridement and microfracture for advanced capitellar osteochondritis dissecans. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Between 2008 and 2015, the authors followed 77 consecutive patients (81 elbows) who underwent arthroscopic debridement and microfracture, and loose body removal if needed, for advanced capitellar osteochondritis dissecans...
May 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28508294/preoperative-mri-is-helpful-but-not-sufficient-to-detect-associated-lesions-in-patients-with-chronic-ankle-instability
#10
Kevin Staats, Manuel Sabeti-Aschraf, Sebastian Apprich, Hannes Platzgummer, Stephan E Puchner, Johannes Holinka, Reinhard Windhager, Reinhard Schuh
PURPOSE: The aim of this study was to determine the reliability and validity of preoperative magnetic resonance imaging (MRI) scans for the detection of additional pathologies in patients with chronic ankle instability (CAI) compared to arthroscopic findings. METHODS: Preoperative MRI images of 30 patients were evaluated regarding articular and periarticular comorbidities and compared to intraoperative findings. The reliability of MRI was determined by calculating specificity, sensitivity, as well as positive and negative predictive values...
May 15, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28507896/intraoperative-resection-control-using-arterial-spin-labeling-proof-of-concept-reproducibility-of-data-and-initial-results
#11
Thomas Lindner, Hajrullah Ahmeti, Isabel Lübbing, Michael Helle, Olav Jansen, Michael Synowitz, Stephan Ulmer
OBJECTIVES: Intraoperative magnetic resonance imaging is a unique tool for visualizing structures during resection and/or for updating any kind of neuronavigation that might be hampered as a result of brain shift during surgery. Advanced MRI techniques such as perfusion-weighted imaging have already proven to be important in the initial diagnosis preoperatively, but can also help to differentiate between tumor and surgically induced changes intraoperatively. Commonly used methods to visualize brain perfusion include contrast agent administration and are therefore somewhat limited...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28507882/aquaporin-1-expression-in-herniated-human-lumbar-intervertebral-discs
#12
Haydn Hoffman, Aaron W Choi, Victor Chang, Jon Kimball, Alan S Verkman, Rubeen Virani, Brian Kim, Tianyi Niu, Daniel C Lu
STUDY DESIGN: Case series. OBJECTIVE: Intervertebral disc (IVD) degeneration is the cause of spondylosis. The pathogenesis is poorly understood, but disc dehydration often plays a role. In this study, we aim to identify and quantify aquaporin-1 (AQP1) in ex vivo human degenerated IVDs obtained intraoperatively and to investigate the relationship between AQP1 levels and magnetic resonance imaging (MRI) T2 intensity of the disc. METHODS: Ex vivo samples of nucleus pulposus (NP) tissue from lumbar IVDs were obtained from 18 consecutive patients who underwent surgery for disc herniation at L4/5 and L5/S1 level...
April 2017: Global Spine Journal
https://www.readbyqxmd.com/read/28506133/clinical-outcomes-following-surgically-repaired-bucket-handle-meniscus-tears
#13
Michael J Moses, David E Wang, Maxwell Weinberg, Eric J Strauss
OBJECTIVES: Meniscus tears are one of the most common knee injuries. Our goal is to investigate the failure rate for surgically repaired bucket-handle meniscus tears and compare clinical outcomes of repairs that failed versus those that did not, at a minimum 2-year follow-up interval. METHODS: 51 patients were identified in this retrospective cohort study who experienced bucket-handle meniscus tears that were isolated or with concomitant ACL injury. Inclusion criteria included age range from 13-55 years, confirmed bucket-handle meniscus tear by MRI and intraoperatively, and at least two-years of post-operative follow-up following index repair...
May 23, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28495945/role-of-high-resolution-dynamic-contrast-enhanced-mri-with-golden-angle-radial-sparse-parallel-reconstruction-to-identify-the-normal-pituitary-gland-in-patients-with-macroadenomas
#14
R Sen, C Sen, J Pack, K T Block, J G Golfinos, V Prabhu, F Boada, O Gonen, D Kondziolka, G Fatterpekar
BACKGROUND AND PURPOSE: Preoperative localization of the pituitary gland with imaging in patients with macroadenomas has been inadequately explored. The pituitary gland enhancing more avidly than a macroadenoma has been described in the literature. Taking advantage of this differential enhancement pattern, our aim was to evaluate the role of high-resolution dynamic MR imaging with golden-angle radial sparse parallel reconstruction in localizing the pituitary gland in patients undergoing trans-sphenoidal resection of a macroadenoma...
May 11, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28490683/-concomitant-surgery-for-symptomatic-severe-carotid-artery-stenosis-and-aortic-valve-stenosis-with-contralateral-internal-carotid-artery-occlusion-a-case-report
#15
Tomonori Takeshita, Kohei Ishihara, Yuu Murakami, Hiroshi Munakata, Katsuhito Mabuni, Tadao Kugai, Tomoaki Nagamine
We report a case of concomitant carotid endarterectomy(CEA)and aortic valve replacement(AVR)for symptomatic severe carotid artery and aortic valve stenosis(AS). A 77-year-old man, presented to our hospital with AS complicated by right internal carotid artery(ICA)stenosis and left ICA occlusion, seeking treatment for AS. He suffered from left hemiparesis, and diffusion-weighted magnetic resonance imaging(MRI)showed multiple ischemic lesions in the right cerebral hemisphere. He was admitted to our neurosurgical department and received treatment for acute cerebral infarction caused by severe right ICA stenosis...
May 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28483395/seizure-outcomes-in-children-following-electrocorticography-guided-single-stage-surgical-resection
#16
Seema Bansal, Andrew J Kim, Anne T Berg, Sookyong Koh, Linda C Laux, Srishti Nangia, John J Millichap, Alexandra Shaw, Breanne Fisher, Catherine Dezort, Arthur J DiPatri, Tord D Alden, Douglas R Nordli
BACKGROUND: In children with abnormal imaging, single-stage epilepsy surgery is an attractive alternative to the two-stage approach that relies on invasive recording of seizures. Implanted electrodes carry risks of their own and extend hospitalization, but the efficacy of one-stage resections in a variety of pathologies and cerebral locations is not well established. We report our center's experience with single-stage epilepsy surgery guided by intraoperative electrocorticography (ECoG)...
February 7, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/28479059/comparison-of-pre-revision-magnetic-resonance-imaging-and-operative-findings-in-mechanically-assisted-crevice-corrosion-in-symptomatic-metal-on-polyethylene-total-hip-arthroplasties
#17
Pavel P Morozov, Munib Sana, Brian J McGrory, Steven W Farraher, Tod G Abrahams
BACKGROUND: Failed total hip arthroplasty (THA) caused by mechanically assisted crevice corrosion (MACC) has serious consequences-notably, adverse local tissue reactions. Metal artifact reduction sequence (MARS) magnetic resonance imaging (MRI) has been used to evaluate failed THA for other reasons but has not been assessed for the analysis of cases of MACC in the setting of metal-on-polyethylene arthroplasties. METHODS: We examined the correlation between preoperative MARS MRI and surgical findings in a cohort of 20 consecutive patients undergoing revision THA for symptomatic MACC without other associated orthopedic diagnoses...
March 18, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28476856/a-solitary-fibrous-tumour-mimicking-an-aggressive-angiomyxoma-liposarcoma
#18
Grace Hwei Ching Tan, Deanna Ng, Tiffany Hennedige, Melissa Teo
We present a case of a solitary fibrous tumour (SFT) resembling an aggressive angiomyxoma/liposarcoma on radiological imaging, causing significant diagnostic challenges preoperatively. A 76-year-old male was incidentally found to have a large pelvic mass on a CT scan. Further evaluation with an MRI scan confirmed a presacral mass containing fat and soft tissue components. It was inseparable from the sacrococcygeal spine, rectal serosa and the posterior wall of the urinary bladder, but no evidence of invasion was seen...
May 5, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28475021/individualized-3d-printed-model-assisted-posterior-screw-fixation-for-the-treatment-of-craniovertebral-junction-abnormality-a-retrospective-study
#19
Fangyou Gao, Qu Wang, Chuangxi Liu, Bing Xiong, Tao Luo
OBJECTIVE This study was undertaken to evaluate the feasibility and efficacy of individualized 3D printed model-assisted posterior internal fixation in treating craniovertebral junction (CVJ) abnormalities. METHODS Forty-four patients (19 males and 25 females; mean age 36.5 ± 9.2 years, range 11-62 years; symptom duration 1 month-15 years) with a CVJ abnormality who were admitted to the authors' institution between April 2010 and April 2015 were retrospectively studied. The individualized 3D printed model of the CVJ was produced based on the individual CT data by use of 3D printing technology...
May 5, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28474582/delayed-extensive-lumbar-sub-dural-effusion-following-discectomy-clinical-imaging-and-case-report
#20
Arun-Kumar Kaliya-Perumal, Meng-Ling Lu, Fu-Cheng Kao, Chi-Chien Niu
Incidental durotomy during lumbar spine surgery is a commonly reported complication. Those presenting with cerebrospinal fluid (CSF) leak are usually recognized and repaired intraoperatively. In some circumstances, it may either be unrecognised or occur as a delayed complication. Such delayed occurrences cannot be predicted and its management remain a challenge to the surgeon, especially when it presents as a subdural effusion. We report a 55-year-old man who underwent mini open lumbar discectomy through left side for a prolapsed L4-L5 disc...
March 2017: BioMedicine
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