A prospective study on age-specific normative values of the prognostic nutritional index and the effects of malnutrition on spinal alignment using health checkup data of elderly residents.

Study Design: A prospective cohort study.

Purpose: To determine the age-specific normative values of the prognostic nutritional index (PNI) among elderly residents in Japan and explore the relationship between malnutrition and spinal alignment.

Overview Of Literature: Nutritional status affects postoperative recovery, with malnourished patients often experiencing severe postoperative complications.

Preoperative cervical alignment can affect the occurrence of proximal junctional kyphosis in patients with adolescent idiopathic scoliosis.

Purpose: This study aimed to investigate the incidence of and risk factors for proximal junctional kyphosis (PJK) in patients with adolescent idiopathic scoliosis (AIS) and evaluate its relationship with cervical alignment.

Methods: We retrospectively analyzed the patients with AIS who underwent surgery. The patients were divided into two groups based on the occurrence of PJK.

Investigating the Influence of Oxford Unicompartmental Knee Arthroplasty Keel on Sagittal Plane Stresses: A Finite Element Analysis.

Purpose The specific impact of keel placement and tibial implant position on stress reduction and fracture risk in the sagittal plane of the Oxford unicompartmental knee arthroplasty (UKA) system remains unclear. Therefore, this study aimed to investigate the stresses produced by the Oxford UKA keel in the sagittal plane to better understand their effects on fracture risk and optimize surgical outcomes. Methods This retrospective study included 89 patients who underwent Oxford UKA.

Comparative Analysis of Fusion and Decompression Surgery in Degenerative Cervical Myelopathy: A Multicenter Observational Study of Transcranial Motor Evoked Potentials (Tc-MEP).

Study Design: A multicenter observational study.

Objective: To evaluate and compare the diagnostic performance and clinical value of transcranial motor-evoked potentials (Tc-MEPs) in predicting postoperative paralysis in degenerative cervical myelopathy (DCM), specifically on stratifying true-positive alerts in fusion versus decompression surgeries.

Summary Of Background Data: Tc-MEP monitoring is widely used to detect intraoperative motor deficits, but its accuracy and predictive value in different surgical approaches remain unclear.

The effect of pelvic incidence on age-related changes in spinopelvic sagittal alignment in older individuals: a longitudinal study for 10 years.

Purpose: Spinopelvic sagittal alignment is a critical determinant of the quality of life and clinical outcomes in older adults. Although pelvic incidence (PI) is a well-established morphological parameter influencing spinopelvic alignment, its role in age-related alignment changes and compensatory mechanisms remains incompletely understood. This study aimed to investigate the influence of PI magnitude on 10-year changes in spinopelvic sagittal alignment and compensatory adaptations in a community-dwelling older population.

A clinical study of ten-year prognosis in patients with lumbar disc herniation treated with condoliase in a phase III trial.

Background: Condoliase is a chemonucleolytic agent approved in Japan for the treatment of lumbar disc herniation (LDH). There had been no follow-up evaluation of its long-term effects on discs covering a period exceeding 10 years.

Methods: The present study evaluated the 10-year post-dose outcomes of patients treated with condoliase during the phase III trial in terms of neurological results, Oswestry Disability Index (ODI), X-ray findings (disc height, posterior intervertebral angle, vertebral body translation), and magnetic resonance image findings (Modic classification, Pfirrmann grade).

Concave Side of Proximal Thoracic Zone Vulnerable to Pedicle Screw Perforation in Adolescent Idiopathic Scoliosis Surgery: Comparative Analysis of Pre- and Intraoperative Computed Tomography Navigation.

The aim of this study was to assess pedicle screw (PS) accuracy and identify perforation patterns using computed tomography (CT) navigation in adolescent idiopathic scoliosis (AIS) surgery. A total of 107 AIS patients were retrospectively reviewed. Preoperative CT navigation was used in 48 patients (853 screws), and intraoperative CT with a second 3D scan was used in 59 patients (1059 screws).

Perioperative Medical Complications in Adult Spine Deformity Surgery: Classification and Prevention Strategies.

Study DesignNarrative review.ObjectiveWe aimed to propose the classifications of, risk factors for, and prevention strategies for perioperative complications from previously published papers in adult spinal deformity (ASD) surgeries.MethodsA literature search was conducted in the PubMed/MEDLINE database to identify studies reporting perioperative complications of spinal deformity surgery, their classifications, risk factors, and prevention strategies.

The Association Between Comorbidities and Medical Complications for Adult Spinal Deformity Surgery: What Factors Have the Greatest Impact on Adverse Events and Outcomes?

Study designNarrative review.ObjectiveIt is known that adult spinal deformity surgery (ASD) is associated with a high medical complication rate. However, it remains unclear which comorbidities impact these adverse events.

"Koshimagari Exercise" for Adult Spinal Deformity in Older Adults: Assessment of Home-Based Exercise Outcomes in a Prospective Multicenter Study.

Introduction: Adult spinal deformity (ASD) is prevalent among older adults, considerably affecting their quality of life. Although surgical interventions are effective, they have high complication rates and medical costs. Furthermore, there is a lack of evidence supporting the effectiveness of nonsurgical treatments (e.

Risk Factors and Consequences of Cage Subsidence after Single-level Posterior or Transforaminal Lumbar Interbody Fusion: A Retrospective Multicenter Study.

Introduction: Cage subsidence (CS) after posterior or transforaminal lumbar interbody fusion (PLIF or TLIF) is challenging; however, its impact on health-related quality of life (HRQOL) remains unclear. This study aimed to explore the impact of CS occurrence on HRQOL and identify the risk factors in patients following PLIF or TLIF.

Methods: A total of 138 patients (mean age, 67 years; follow-up period, 12 months) who underwent single-level PLIF or TLIF were retrospectively analyzed.

The impact of lumbosacral transitional vertebrae on the distribution and healing of lumbar spondylolysis.

Purpose: Lumbosacral transitional vertebra (LSTV) are a common anatomical variant of the lumbosacral junction that has been associated with various spinal disorders. However, no prior studies have examined the relationship between LSTV and lumbar spondylolysis. Therefore, the aim of this study was to elucidate the prevalence of LSTV and assess its impact on the affected spinal level and bone union rate in patients with lumbar spondylolysis.

Selective Versus Non-Selective Thoracic Fusion for Adolescent Idiopathic Scoliosis Lenke 1B/1C Curves: Multi-Center Clinical and Radiographic Analysis at 2-Year Follow-Up.

: This retrospective cohort study compared selective thoracic fusion (STF) and non-STF for adolescent idiopathic scoliosis (AIS) Lenke 1B/1C curves. Although STF is considered an attractive option for patients with a compensatory lumbar curve, direct clinical comparisons between STF and non-STF remain limited. : AIS patients (≥2 years follow-up) undergoing posterior spinal fusion were divided into STF (57 cases) and non-STF (21 cases) groups.

Diagnostic errors in subcutaneous myxofibrosarcoma: a retrospective case series before referral to specialist in bone and soft tissue tumors.

Background: Malignant subcutaneous soft tissue sarcomas, including myxofibrosarcoma, are often misdiagnosed as benign soft tissue tumors by non-specialists. This study investigated the clinical features of subcutaneous myxofibrosarcoma before referral to our department specializing in bone and soft tissue tumors.

Methods: A retrospective case series analysis was conducted on 26 patients with subcutaneous myxofibrosarcoma who were referred to our department between 2013 and 2024.

Who benefits from home-based exercise for adult spinal deformity? A prospective multicenter study on clinical and radiographic predictors.

Purpose: The prevalence of adult spinal deformity (ASD) is expected to exceed 60 million by 2050 due to an aging population and increased life expectancy. Despite advances in surgery, high complication rates and the economic burden highlight the need for effective non-surgical treatments. This study assesses the "Koshimagari Exercise," a self-exercise program for ASD patients, and aims to develop a classification system to identify those who would benefit most.

Evaluation of soft tissue balancing and component alignment in computer-navigated TKA for valgus knee.

Purpose: Computer-navigated total knee arthroplasty (CN-TKA) is useful for improving the accuracy of osseous cuts, soft tissue balance, and component placement. However, the usefulness of CN-TKA for valgus deformity remains unclear. This study aimed to assess the availability of CN-TKA for valgus deformities and compare it with CN-TKA for varus knees.

Does Somatosensory-Evoked Potential Simultaneously Decrease with Transcranial Motor-Evoked Potential Alarm? A Multicenter Study by the Monitoring Committee of the Japanese Society for Spine Surgery and Related Research.

Introduction: Multimodal intraoperative neurophysiological monitoring (IONM)-such as monitoring muscle-evoked potentials after transcranial electrical stimulation (Tc-MEP) with somatosensory-evoked potential (SEP) after electrical stimulation of the peripheral nerve-is recommended in spine surgeries to prevent iatrogenic neurological complications. However, the effect of using Tc-MEP with SEP to protect against neurological complications, particularly motor function, remains unknown. In clinical settings, changes due to Tc-MEP meeting the alarm points must be a potential neurological injury.

Risk Factors and Consequences of Postoperative Urinary Tract Infections in Patients with Traumatic Cervical Cord Injury: A Retrospective Analysis.

Introduction: There is a lack of research on the relationship between cervical spinal cord injury (SCI) surgery and symptomatic urinary tract infections (UTIs); hence, this study seeks to fill this critical knowledge gap in postoperative care. This study aims to identify the risk factors for UTIs in patients with traumatic cervical SCI.

Methods: We retrospectively analyzed 187 patients (mean age: 68 years) who underwent cervical SCI surgery between 2017 and 2021.

Corrective Long Spinal Fusion to the Ilium for Patients with Adult Spinal Deformity Results in Good Physical Function after Mid- to Long-Term Postoperative Follow-Up.

Introduction: This study investigated the mid- to long-term postoperative outcomes of patients with adult spinal deformity (ASD), focusing on physical function and quality of life (QOL). We also compared age-related changes between patients aged 75 years or older (high elderly) and those younger than 75 years (low elderly).

Methods: A total of 47 patients with ASD underwent thoracic-iliac long spinal fusion between August 2013 and September 2014.

Characteristics of Poor Recordability of Intraoperative Neurophysiological Monitoring during Metastatic Spinal Tumor Surgery: A Multicenter Study.

Introduction: The objective of this study is to investigate the poor recordability characteristics of intraoperative neurophysiological monitoring (IONM) for metastatic spinal tumors, focusing on tumor status or preoperative muscle weakness.

Methods: A total of 132 patients (age 65.3±11.

Comparing Electromyographic Muscle Activities and Kinematics During Sit-to-Stand Transitions in Patients with Adult Spinal Deformity Versus Healthy Controls.

Adult spinal deformity (ASD) affects sit-to-stand (STS) transitions due to abnormal spinal alignment, influencing muscle function. This study investigated lower-extremity electromyographic activity and kinematic parameters during STS transitions in ASD patients. A cross-sectional study was conducted with ASD patients scheduled for corrective surgery.

Waistline Asymmetry Patterns and Clinical Impact in Patients with Adolescent Idiopathic Scoliosis.

Study Design: Retrospective design.

Objective: This study aimed to 1) classify waistline asymmetry by scoliosis type, 2) evaluate postoperative changes, and 3) assess clinical outcomes in patients with adolescent idiopathic scoliosis (AIS) using digital photography.

Summary Of Background Data: AIS often affects physical appearance, with waistline asymmetry being particularly affected.

Effect of a Surgeon-Directed Cocktail of Ropivacaine, Methylprednisolone, and Ketoprofen on Postoperative Pain and Ambulation in Adolescent Idiopathic Scoliosis Surgery: A Double-Blind Randomized Controlled Trial.

Study Design: Double-blind randomized controlled trial.

Objective: To assess the safety and efficacy of surgeon-directed intraoperative subfascial cocktail analgesics in adolescent scoliosis surgery.

Summary Of Background Data: Several studies have demonstrated the efficacy of intraoperative surgeon-directed analgesics in idiopathic scoliosis surgery.

Long-term follow-up of non‑neurologic and neurologic complications after complex adult spinal deformity surgery: results from the Scoli-RISK-1 study.

Purpose: To report all complications that occurred during the 2 to 5-year postoperative period, describe reoperations during this time period, and compare patients who did and did not have major, surgery-related complications and/or reoperations during this time period.

Methods: The Scoli-RISK-1 study enrolled 272 ASD patients undergoing surgery from 15 centers. Inclusion criteria were Cobb angle of > 80°, corrective osteotomy for congenital/revision deformity, and/or 3-column osteotomy.

Difference of Disk Degeneration and Segmental Range of Motion due to Lumbar Disk Level among Age and Gender: 639 Asymptomatic Volunteer Data.

Introduction: There is limited evidence between lumbar disk degeneration and normal lumbar segmental range of motions (SRMs), because previous studies were skewed by age and lacked large cohort of asymptomatic data. We aimed to characterize the normal lumbar SRMs according to age and gender and determine its association with disk degeneration.

Methods: A total of 639 healthy Japanese volunteers (≥50 individuals of each decade of age from 20 to 79) without any symptom or morphological spinal abnormalities, who underwent lumbar radiograph and magnetic resonance image (MRI), were selected retrospectively.