Study Design:Retrospective review.Objectives:This study investigates the prevalence of adverse postsurgical events, or osteoporosis-related complications (ORCs), following spinal fusion.Methods:Patients undergoing primary posterior thoracolumbar or lumbar fusion by 1 of 2 surgeons practicing at a single institution were analyzed from 2007 to 2014. ORCs were defined in one of the following categories: revision surgery, compression fracture, proximal junctional kyphosis, pseudarthrosis, or failure of instrumentation. Patients with a bone mineral density of the hips and/or spine performed within 1 year of the index procedure were included. Patients were stratified into normal bone density, osteopenia, and osteoporosis using WHO guidelines. Patients were excluded if they were younger than 18 years at the time of surgery, with infection, malignancy, skeletal dysplasia, neuromuscular disorders, concomitant or staged anterior-posterior procedure, or fusion performed because of trauma.Results:Out of 140 patients included, the prevalence of normal bone density was 31.4% (44/140), osteopenia 58.6% (82/140), and osteoporosis 10.0% (14/140). There were no differences between groups for gender, age, body mass index, and interbody device rate. The overall prevalence of ORCs was 32.1% (45/140). By group, there was a prevalence of 22.7% (10/44), 32.9% (27/82), and 50.0% (7/14) for normal bone density, osteopenia, and osteoporosis, respectively. These differences were significantly higher for both the osteopenia and osteoporosis groups.Conclusions:Patients with T scores below −1.0 undergoing posterior lumbar fusion have an increased prevalence of ORCs. Consideration of bone density plays a crucial role in patient selection, medical management, and counseling patient expectations.

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RESEARCH • RECHERCHEImproving spine surgical access, appropriateness and efficiency in metropolitan, urban and rural settings Background: The Inter-professional Spine Assessment and Education Clinics (ISAEC) were developed to improve primary care assessment, education and management of patients with persistent or recurrent low back pain-related symptoms. This study aims to determine the effect of ISAEC on access for surgical assessment, referral appropriateness and efficiency for patients meeting a priori referral criteria in rural, urban and metropolitan settings. Methods:We conducted a retrospective review of prospective data from networked ISAEC clinics in Thunder Bay, Hamilton and Toronto, Ontario. For patients meeting surgical referral criteria, wait times for surgical assessment, surgical referral-related magnetic resonance imaging (MRI) scans and appropriateness of referral were recorded. Results:Overall 422 patients, representing 10% of all ISAEC patients in the study period, were referred for surgical assessment. The average wait times for surgical assessment were 5.4, 4.3 and 2.2 weeks at the metropolitan, urban and rural centres, respectively. Referral MRI usage for the group decreased by 31%. Of the patients referred for formal surgical assessment, 80% had leg-dominant pain and 96% were deemed appropriate surgical referrals. Conclusion:Contrary to geographic concentration of health care resources in metropolitan settings, the greatest decrease in wait times was achieved in the rural setting. A networked, shared-cared model of care for patients with low back pain-related symptoms significantly improved access for surgical assessment despite varying geographic practice settings and barriers. The greatest reductions were noted in the rural setting. In addition, significant improvements in referral appropriateness and efficiency were achieved compared with historical reports across all sites. [ISAEC]) ont été mises sur pied pour améliorer les soins primaires d'évaluation, d'éducation et de prise en charge des patients atteints de symptômes persistants ou récurrents de lombalgie. Cette étude a pour but d'évaluer l'effet des ISAEC sur l'accès à une évaluation chirurgicale et sur la pertinence et l'efficacité de la référence des patients en milieux ruraux, urbains et métropolitains répondant a priori aux critères de référence. Contexte : Les cliniques interprofessionnelles d'évaluation de la colonne vertébrale et d'éducation (Inter-professional Spine Assessment and Education ClinicsMéthodes : Nous avons mené une étude rétrospective de données prospectives issues de cliniques du réseau des ISAEC situées à Thunder Bay, à Hamilton et à Toronto, en Ontario. Nous avons retenu pour l'étude les patients répondant aux critères de référence en chirurgie; pour chacun de ces patients, nous avons consigné le temps d'attente pour obtenir une évaluation chirurgicale, les images obtenues par résonance magnétique (IRM) aux fins de référence et la pertinence de la référence.Résultats : Au total, 422 patients, soit 10 % des ...

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2.

Dorsal epidural migration of lumbar disc extrusion is rare and commonly misdiagnosed. Our purpose was to retrospectively analyze soft-tissue abnormalities on axial MR imaging in both the ventral and lateral epidural space in such dorsal epidural migrations. The presence of each component required complete concordance by 3 independent neuroradiologist readers. In a case series ( = 6) of surgically proved dorsal lumbar disc migrations, in which the radiologist's favored prospective diagnosis had not been correct, each case demonstrated epidural soft-tissue abnormality that had components both laterally and ventrally, abutting the parent disc. Similarly, in previously published cases for which axial MR imaging was available, the lateral component was demonstrated in 23/24 cases (96%). Ventral abutment of the parent disc was evident, in addition, in 17/18 cases (94%) with available disc-level axial images. Both ventral and lateral epidural soft-tissue abnormalities are typically present in dorsal lumbar disc herniations and may help radiologists suggest this rare diagnosis in appropriate cases.

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Radiographic reporting in adolescent idiopathic scoliosis:Is there a discrepancy comparing radiologists' reports and surgeons' assessments? Karamjot Sidhu,