Does the degree of preoperative gait disturbance remain after tumor resection in patients with intradural extramedullary spinal cord tumors?

Study Design: Retrospective comparative study.

Objective: This study aimed to determine whether the degree of preoperative gait disturbance remains following surgical resection in patients with intradural extramedullary spinal cord tumors (IDEMSCTs), and to investigate any factors that may influence poor improvement in postoperative gait disturbance.

Setting: The single institution in Japan.

Incidence and predictive factors of shoulder imbalance after selective anterior spinal fusion surgery in Lenke type 5C adolescent idiopathic scoliosis.

Background: No study has assessed the incidence or predictors of postoperative shoulder imbalance (PSI) in patients with Lenke type 5C adolescent idiopathic scoliosis (AIS) who underwent selective anterior spinal fusion (ASF). This study evaluated the incidence and predictors of shoulder imbalance after selective ASF for Lenke type 5C AIS.

Methods: In total, 62 patients with Lenke type 5C AIS (4 men and 58 women, mean age at surgery of 15.

Circumferential Bone Fusion in Adult Spinal Deformity via Combination of Oblique Lateral Interbody Fusion and Grade 2 Posterior Column Osteotomy.

Study Design: Retrospective study.

Objectives: The combination of oblique lateral interbody fusion (OLIF) with grade 2 posterior column osteotomy (PCO) is an effective treatment for adult spinal deformity. However, grade 2 PCO may lead to pseudoarthrosis because it involves complete removal of the bilateral posterior facet joints.

Selective Anterior Fusion Surgery Does Not Influence Global Spinal Sagittal Alignment in Lenke Type 5 Adolescent Idiopathic Scoliosis Patients.

Study Design: Retrospective comparative study.

Objective: The aim of this study was to evaluate the changes in global spinal sagittal alignment (GSSA) following selective anterior spinal fusion (ASF) in patients with Lenke type 5 adolescent idiopathic scoliosis (AIS).

Summary Of Background Data: Few studies have assessed the changes in postoperative GSSA, including cervical, thoracic, and lumbosacral sagittal alignment in AIS patients with major thoracolumbar/lumbar (TL/L) curve who underwent selective ASF.

Clinical Efficacies of the Minimal Retroperitoneal Approach for Infectious Spondylodiscitis: A Clinical Case Series.

Introduction: An anterior surgical approach for severe infectious spondylodiscitis in the lumbar region is optimal but not always atraumatic. The aim of this study was to evaluate the efficacy and safety of a minimal anterior-lateral retroperitoneal approach, also known as a surgical approach for oblique lumbar interbody fusion, for cases with severe infectious spondylodiscitis with osseous defects.

Methods: Twenty-four consecutive patients who underwent anterior debridement and spinal fusion with an autologous strut bone graft for infectious spondylodiscitis with osseous defects were reviewed retrospectively.

Combination of sacral-alar-iliac screw and cortical bone trajectory screw techniques for lumbosacral fixation: technical note.

Objective: Lumbosacral fixation plays an important role in the management of devastating spinal pathologies, including osteoporosis, fracture, infection, tumor resection, and spinal deformities, which require long-segment fusion constructs to the sacrum. The sacral-alar-iliac (SAI) screw technique has been developed as a promising solution to facilitate both minimal invasiveness and strong fixation. The rationale for SAI screw insertion is a medialized entry point away from the ilium and in line with cranial screws.

Incidences and Risk Factors for Postoperative Non-Union after Posterior Lumbar Interbody Fusion with Closed-Box Titanium Spacers.

Study Design: A retrospective, single-center clinical study with follow-up of more than 24 months.

Purpose: To evaluate the union rates and relevant risk factors for non-union after posterior lumbar interbody fusion (PLIF) using porous-coated closed-box titanium spacers.

Overview Of Literature: Although the use of a closed-box interbody spacer for PLIF could avoid potential complications associated with the harvesting of autologous bone, few studies have reported detailed follow-up of fusion progression and risk factors for non-union in the early postoperative period.

Risk, Recovery, and Clinical Impact of Neurological Complications in Adult Spinal Deformity Surgery.

Study Design: Multicenter retrospective case series.

Objective: To report the risks, recovery, and clinical impact of neurological complications (NCs) in adult spinal deformity (ASD) surgery.

Summary Of Background Data: Although recent studies have reported the incidence of NCs in ASD surgery, few have addressed the recovery from and clinical impacts of NC.

Feasibility of using tapping torque during lumbar pedicle screw insertion to predict screw fixation strength.

Background: Rigid pedicle screw fixation is mandatory for achieving successful spinal fusion; however, there is no reliable method predicting screw fixation before screw insertion. The purpose of the present study was to investigate the efficacy of measurement of tapping torque to predict pedicle screw fixation.

Methods: First, different densities of polyurethane foam were used to measure tapping torque.

Clinical Outcomes, Complications, and Cost-effectiveness in Surgically Treated Adult Spinal Deformity Over 70 Years: A Propensity score-Matched Analysis.

Study Design: This is a multicentered retrospective study.

Summary Of Background Data: Surgical correction for the adult spinal deformity (ASD) is effective but carries substantial risks for complications. The diverse pathologies of ASD make it difficult to determine the effect of advanced age on outcomes.

The 5-Item Modified Frailty Index Is Predictive of Severe Adverse Events in Patients Undergoing Surgery for Adult Spinal Deformity.

Study Design: A retrospective review of 281 consecutive cases of adult spine deformity (ASD) surgery (age 55 ± 19 yrs, 91% female, follow-up 4.3 ± 1.9 yrs) from a multicenter database.

Surgical risk stratification based on preoperative risk factors in adult spinal deformity.

Background Context: Corrective surgery for adult spinal deformity (ASD) improves health-related quality of life but has high complication rates. Predicting a patient's risk of perioperative and late postoperative complications is difficult, although several potential risk factors have been reported.

Purpose: To establish an accurate, ASD-specific model for predicting the risk of postoperative complications, based on baseline demographic, radiographic, and surgical invasiveness data in a retrospective case series.

Predictive model for major complications 2 years after corrective spine surgery for adult spinal deformity.

Purpose: ASD surgery improves a patient's health-related quality of life, but it has a high complication rate. The aim of this study was to create a predictive model for complications after surgical treatment for adult spinal deformity (ASD), using spinal alignment, demographic data, and surgical invasiveness.

Methods: This study included 195 surgically treated ASD patients who were > 50 years old and had 2-year follow-up from multicenter database.

Treatment for Frailty Does Not Improve Complication Rates in Corrective Surgery for Adult Spinal Deformity.

Study Design: A retrospective multicenter database review of 240 consecutive patients at least 21 years of age (mean 58 ± 17, range 22-79) who underwent surgery for adult spinal deformity (ASD) and were followed at least 2 years.

Objective: To investigate how treatment for frailty affects complications in surgery for ASD.

Summary Of Background Data: Several recent studies have focused on associations between frailty and surgical complications.

Surgical Outcomes for Drop Body Syndrome in Adult Spinal Deformity.

Study Design: A multicenter retrospective case series of patients treated surgically for adult spinal deformity (ASD).

Objective: The aim of this study was to compare clinical outcomes between propensity score matched ASD patients with or without drop body syndrome (DBS).

Summary Of Background Data: DBS is an extreme primary sagittal-plane deformity often seen in Asian countries.

Impact of Frailty and Comorbidities on Surgical Outcomes and Complications in Adult Spinal Disorders.

Study Design: Retrospective review of surgically treated 481 adult patients with spinal disorders.

Objective: The aim of this study was to elucidate the effect of frailty and comorbidities on postoperative health-related quality of life (HRQoL) and complication rates.

Summary Of Background Data: Elective surgeries for spinal disorders not only improve clinical outcomes but also have high complication rates.

Clinical outcomes of late decompression surgery following cervical spinal cord injury with pre-existing cord compression.

Study Design: Retrospective cohort study.

Objectives: The purpose of the current study was to examine the effectiveness of late decompression surgery for traumatic cervical spinal cord injury (CSCI) with pre-existing cord compression.

Setting: Murayama Medical Center, National Hospital Organization, Tokyo, Japan.

Exploration for reliable radiographic assessment method for hinge-like hypermobility at atlanto-occipital joint.

Purpose: Hinge-like hyper-mobility is occasionally observed at the atlanto-occipital (O-C1) joint. However, it has not been clear if this kind of hinge-like hyper-mobility at the O-C1 joint should be regarded as "pathologic", or referred to as "instability". To solve this issue, we aimed to establish a reliable radiographic assessment method for this specific type of O-C1 instability and figure out the "standard value" for the range of motion (ROM) of the O-C1 joint.

Fine-tuning the Predictive Model for Proximal Junctional Failure in Surgically Treated Patients With Adult Spinal Deformity.

Study Design: Multicenter retrospective study.

Objective: To validate and improve the predictive model for proximal junctional failure (PJF) with or without the bone mineral density (BMD) score.

Summary Of Background Data: PJF is a serious complication of surgery for adult spinal deformity (ASD).

Comparison of Pedicle Screw Fixation Strength Among Different Transpedicular Trajectories: A Finite Element Study.

Study Design: Comparative biomechanical study by finite element (FE) method.

Objective: To investigate the pullout strength of pedicle screws using different insertional trajectories.

Summary Of Background Data: Pedicle screw fixation has become the gold standard for spinal fusion, however, not much has been done to clarify how the fixation strength of pedicle screws are affected by insertional trajectories and bone properties.

Effect of the upper instrumented vertebral level (upper vs. lower thoracic spine) on gait ability after corrective surgery for adult spinal deformity.

Background Context: The relationship between gait pattern and the level of upper instrumented vertebra (UIV) in surgically treated patients with adult spinal deformity (ASD) has not been fully documented.

Purpose: This study aimed to assess the effect of UIV level for the gait pattern in ASD.

Study Design/setting: A prospective case series was carried out.

Does corrective spine surgery improve the standing balance in patients with adult spinal deformity?

Background Context: The effect of corrective spine surgery on standing stability in adult spinal deformity (ASD) has not been fully documented.

Purpose: To compare pre- and postoperative standing balance and posture in patients with ASD.

Study Design/setting: This study is a prospective case series.

Cortical Bone Trajectory for Thoracic Pedicle Screws: A Technical Note.

Study Design: A morphometric measurement of new thoracic pedicle screw trajectory using computed tomography and a biomechanical study on cadaveric thoracic vertebrae using insertional torque.

Objective: To introduce a new thoracic pedicle screw trajectory which maximizes engagement with denser bone.

Summary Of Background Data: Cortical bone trajectory (CBT) which maximizes the thread contact with cortical bone provides enhanced screw purchase.