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BACKGROUND: Previous studies on cervical instability failed to explain the dynamic and static interaction relationship and pathological characteristics changes in the development of cervical lesions under the traditional imaging examination. In recent years, the emerging nuclear magnetic resonance imaging (MRI) radiomics can provide a new way for in-depth research on cervical instability. OBJECTIVE: To investigate the application value of MRI radiomics in the study of cervical instability. METHODS: Through recruitment advertisements and the Second Department of Spine of Wangjing Hospital, China Academy of Chinese Medical Sciences, young cervical vertebra unstable subjects and non-unstable subjects aged 18-45 years were included in the cervical vertebra nuclear magnetic image collection. Five specific regions of interest, including the intervertebral disc region, the facet region, the prevertebral muscle region, the deep region of the posterior cervical muscle group, and the superficial region of the posterior cervical muscle group, were manually segmented to extract and screen the image features. Finally, the cervical instability diagnosis classification model was constructed, and the effectiveness of the model was evaluated using the area under the curve. RESULTS AND CONCLUSION: (1) A total of 56 subjects with cervical instability and 55 subjects with non-instability were included, and 1 688 imaging features were extracted for each region of interest. After screening, 300 sets of specific image feature combinations were obtained, with 60 sets of regions of interest for each group. (2) Five regions of interest diagnostic classification models for cervical instability were initially established. Among them, the support vector machine model for the articular process region and the support vector machine model for the deep cervical muscle group had certain accuracy for the classification of instability and non-instability, and the average area under the curve of ten-fold cross-validation was 0.719 7 and 0.703 3, respectively. (3) The Logistic model in the intervertebral disc region, the LightGBM model in the prevertebral muscle region, and the Logistic model in the superficial posterior cervical muscle region were generally accurate in the classification of instability and non-instability, and the average area under the curve of ten-fold crossvalidation was 0.650 4, 0.620 7, and 0.644 2, respectively. (4) This study proved the feasibility of MRI radiomics in the study of cervical instability, further deepened the understanding of the pathogenesis of cervical instability, and also provided an objective basis for the accurate diagnosis of cervical instability. [ABSTRACT FROM AUTHOR]

The Ehlers-Danlos Syndromes (EDS) represent a group of hereditary connective tissue disorders, with the hypermobile subtype (hEDS) being the most prevalent. hEDS manifests with a diverse array of clinical symptoms and associated comorbidities spanning the musculoskeletal, neurological, gastrointestinal, cardiovascular, and immunological systems. hEDS patients may experience spinal neurological complications, including cervico-medullary symptoms arising from cranio-cervical and/or cervical instability/hypermobility, as well as tethered cord syndrome (TCS). TCS is often radiographically occult in nature, not always detectable on standard imaging and presents with lower back pain, balance issues, weakness in the lower extremities, sensory loss, and bowel or bladder dysfunction. Cervical instability due to ligament laxity can lead to headaches, vertigo, tinnitus, vision changes, syncope, radiculopathy, pain, and dysphagia. TCS and cervical instability not only share clinical features but can also co-occur in hEDS patients, posing challenges in diagnostics and clinical management. We present a review of the literature and a case study of a 20-year-old female with hEDS, who underwent surgical interventions for these conditions, highlighting the challenges in diagnosing and managing these complexities and underscoring the importance of tailored treatment strategies to improve patient outcomes. [ABSTRACT FROM AUTHOR]

BackgroundUpper cervical instability (UCI) is a potentially disabling complication of the connective tissue disorders hypermobile Ehlers-Danlos Syndrome and Hypermobility Spectrum Disorders (hEDS/HSD). UCI can impact various neurological structures, including the brainstem, spinal cord, cranial nerves, and blood supply to and from the brain, resulting in complex neurological signs and symptoms in this population. The current study was an observational study applying recent expert consensus recommendations for physical therapy assessment and management of patients with UCI associated with hEDS/HSD.MethodsThis was a retrospective observational study describing how the clinical decision-making model was used to screen, examine, and treat three patients with highly irritable hEDS/HSD-related UCI, resulting in complex neurological presentation. The treatment used a neuroplasticity approach, including proprioception and motor control training emphasizing patient education and biofeedback. Outcome measures tracked progress.ResultsAll patients started with significant disability associated with UCI. One patient returned to full function with intermittent flares that he was able to manage. The second patient continued to have mild-moderate irritability but returned to parenting responsibilities and full-time work. The third patient required cervical fusion and remained disabled but was better able to minimize flares. The number of initial red and yellow flags was associated with the final outcomes, suggesting that the decision-making model might be useful for predicting patient prognosis.ConclusionThis brief report applies recent recommendations for safely evaluating and managing hypermobility-related UCI and provides a first step in experimental studies to test both the assessment and physical therapy treatment approaches.

Introduction The aim of the study was to evaluate the risk factors for cervical instability in rheumatoid arthritis (RA). Material and methods Computer searches were conducted in PubMed, Embase, Cochrane Library, the China National Knowledge Infrastructure (CNKI) database, the Wan Fang database, the Chinese Scientific Journal Databases (VIP) database, and the Chinese Biomedical Literature database (CBM) from their establishment until November 2022. Results A total of 8 articles were included in this study, including 1 cross-sectional study, 5 case-control studies, and 2 cohort study, including 3078 patients with RA. Meta analysis results showed that: male sex (OR = 1.70, 95% CI: 1.19–2.42), course of disease (OR = 1.72, 95% CI: 1.29–2.28), long-term glucocorticosteroid use (OR = 2.84, 95% CI: 1.97–2.40), Steinbrocker staging (OR = 2.30, 95% CI: 1.61–3.28), disability at baseline (OR = 24.57, 95% CI: 5.51–109.60), peripheral joint destruction (OR = 2.24, 95% CI: 1.56–3.21), Steinbrocker stage I-IV progression to disability (OR = 20.08, 95% CI: 4.18–96.53), and previous joint surgery (OR = 1.54, 95% CI: 1.06–2.26) are the main risk factors for cervical instability in RA. Conclusions There are many risk factors for cervical instability in RA. In clinical practice, special attention should be paid to patients who are male, have a longer course of disease, have long-term glucocorticosteroid use, have previous joint surgery, have peripheral joint damage, and develop disability in Steinbrocker stage I-IV. Attention should be paid to the high-risk groups mentioned above, and effective measures such as early screening and full monitoring should be taken to prevent the occurrence of cervical instability in RA.

This article presents a study on the use of artificial intelligence (AI) models to diagnose common eye diseases based on B-mode ultrasound images. The study found that the ConvNeXt-L model performed the best in classifying eye diseases, but had difficulty distinguishing between certain diseases. The researchers recommend using the models for preliminary diagnosis, but further evaluation by medical professionals is necessary to prevent misdiagnosis. The study aims to improve the accuracy and efficiency of diagnosing eye diseases, particularly in underdeveloped regions. In another study, researchers examined anatomical variations in the arches of the atlas bone in the neck. They found that 3% of the analyzed images exhibited variations in the atlas arches, with a higher prevalence in females. The most common variation was a median cleft in the posterior arch. The study proposes an updated classification system for these variations based on a systematic review of the literature. Accurately categorizing these variations is important for clinical practice and treatment planning. [Extracted from the article]

This corrigendum acknowledges errors in the original article titled "Anatomical variations of the atlas arches: prevalence assessment, systematic review and proposition for an updated classification system." It provides corrections for the captions of Figure 4 and Figure 3, and includes a revised typology of atlas arch variations. The document categorizes these variations into different types, such as Type A, Type B, Type C, Type D, Type E, Type F, and Type G, each with specific characteristics and variations. The corrigendum also acknowledges errors in the original publication, including errors in figures and tables, and expresses gratitude to a graphic designer for their contribution to the illustrations. The publisher's note clarifies that the views expressed in the article are solely those of the authors and do not necessarily represent the views of their affiliated organizations or the publisher. [Extracted from the article]

The Ehlers-Danlos Syndromes (EDS) represent a group of hereditary connective tissue disorders, with the hypermobile subtype (hEDS) being the most prevalent. hEDS manifests with a diverse array of clinical symptoms and associated comorbidities spanning the musculoskeletal, neurological, gastrointestinal, cardiovascular, and immunological systems. hEDS patients may experience spinal neurological complications, including cervico-medullary symptoms arising from cranio-cervical and/or cervical instability/hypermobility, as well as tethered cord syndrome (TCS). TCS is often radiographically occult in nature, not always detectable on standard imaging and presents with lower back pain, balance issues, weakness in the lower extremities, sensory loss, and bowel or bladder dysfunction. Cervical instability due to ligament laxity can lead to headaches, vertigo, tinnitus, vision changes, syncope, radiculopathy, pain, and dysphagia. TCS and cervical instability not only share clinical features but can also co-occur in hEDS patients, posing challenges in diagnostics and clinical management. We present a review of the literature and a case study of a 20-year-old female with hEDS, who underwent surgical interventions for these conditions, highlighting the challenges in diagnosing and managing these complexities and underscoring the importance of tailored treatment strategies to improve patient outcomes.

We report a 10‐year‐old boy with a de novo pathogenic variant in ALDH18A1, a rare form of metabolic cutis laxa, which was complicated by atlantoaxial instability and spinal cord compression following a fall from standing height. The patient required emergent cervical spine fusion and decompression followed by a 2‐month hospitalization and rehabilitation. In addition to the core clinical features of joint and skin laxity, hypotonia, and developmental delays, we expand the connective tissue phenotype by adding a new potential feature of cervical spine instability. Patients with pathogenic variants in ALDH18A1 may warrant cervical spine screening to minimize possible morbidity. Neurosurgeons, geneticists, primary care providers, and families should be aware of the increased risk of severe cervical injury from minor trauma. [ABSTRACT FROM AUTHOR]

Objective and backgroundThis study focuses on the atlas, a pivotal component of the craniovertebral junction, bridging the cranium and spinal column. Notably, variations in its arches are documented globally, necessitating a thorough assessment and categorization due to their significant implications in clinical, diagnostic, functional, and therapeutic contexts. The primary objective is to ascertain the frequency of these anatomical deviations in the atlas arches among a Colombian cohort using cone-beam computed tomography (CBCT).MethodologyEmploying a descriptive, cross-sectional approach, this research scrutinizes the structural intricacies of the atlas arches in CBCT scans. Analytical parameters included sex distribution and the nature of anatomical deviations as per Currarino’s classification. Statistical analyses were conducted to identify significant differences, including descriptive statistics and Chi-square tests. A systematic review of the literature was conducted in order to enhance the current Currarino’s classification.ResultsThe study examined 839 CBCT images, with a nearly equal sex distribution (49.7% female, 50.3% male). Anatomical variations were identified in 26 instances (3%), displaying a higher incidence in females (X2 [(1, N = 839) = 4.0933, p = 0.0430]). The most prevalent variation was Type A (2.5%), followed by Type B (0.4%), and Type G (0.2%) without documenting any other variation. The systematic review yielded 7 studies. A novel classification system for these variations is proposed, considering global prevalence data in the cervical region.ConclusionThe study highlights a statistically significant predominance of Type A variations in the female subset. Given the critical nature of the craniovertebral junction and supporting evidence, it recommends an amendment to Currarino’s classification to better reflect these clinical observations. A thorough study of anatomical variations of the upper cervical spine is relevant as they can impact important functional aspects such as mobility as well as stability. Considering the intricate anatomy of this area and the pivotal function of the atlas, accurately categorizing the variations of its arches is crucial for clinical practice. This classification aids in diagnosis, surgical planning, preventing iatrogenic incidents, and designing rehabilitation strategies.

Headache is a frequent symptom among patients with hypermobility spectrum disorders. This mini review focuses specifically on a challenging aspect of headache evaluation in all patients, but especially those with hypermobility – the orthostatic headache. While the differential for an orthostatic headache is overall limited, patients with hypermobility disorders have risk factors for all of the most commonly encountered orthostatic headache disorders. The most common conditions to produce orthostatic headaches are discussed – spontaneous intracranial hypotension, cervicogenic headache, and postural orthostatic tachycardia syndrome. Less common etiologies of orthostatic headache pertinent to any patient are presented in table format.

Objectives: Posterior atlantoaxial stabilization can be technically challenging. Postoperative C2 nerve dysfunction occurs as a complication of this procedure or when a lateral mass is exposed and sacrificed for screw placement. Patients with cervical pathology sometimes complain of low back pain simultaneously. In this study, we aimed to investigate the results of C1-C2 posterior stabilization and C2 nerve root sacrifice on postoperative lumbar complaints. Methods: Twenty-six patients who underwent multicentric posterior C1-C2 stabilization due to atlantoaxial dislocation were retrospectively included in the study. Those that were not sacrificed the C2 nerve root during stabilization were considered group 1 (n = 12), and those that were sacrificed the C2 nerve root were considered group 2 (n = 14). A visual Analogue Scale (VAS) was used for the neck, arm, low back, and leg pain. The EQ5D Index was used as the overall quality of life scale. Results: Six months postoperatively, both groups showed significant (p < 0.01) improvement in VAS neck, arm, and low back scores between preoperative and postoperative. In addition, there was no significant improvement in the VAS leg and EQ-5D score in either of the groups. While no significant decrease was found in occipital neuralgia in group 1, it showed significant (p < 0.01) improvement in occipital neuralgia in group 2. Conclusions: Although the exact pathophysiology is unknown, cervical stabilization surgery and sacrification of the C2 nerve root in this surgery can, directly and indirectly, improve low back pain. [ABSTRACT FROM AUTHOR]

Skull base osteomyelitis is a rare but dangerous consequence of untreated malignant otitis externa. Pseudomonas aeruginosa is responsible for most cases with typical presentation. Here, we discuss a diabetic 54‐year‐old female presented with malignant otitis externa and bilateral facial paresis followed by cervical spondylitis and C1‐C2 instability. Skull base osteomyelitis confirmed by clinical presentation, imaging, and laboratory data. Fortunately, she responded well to antibacterial and antifungal therapy. Due to limited data, there is no confirmed standard of treatment for cervical instability secondary to SBO. It seems antibiotic therapy is the mainstay of treatment. In case of poor response to antibiotic therapy, surgical intervention is inevitable. This article introduces the first case of SBO‐related AAI successfully managed with conservative treatment. Skull base osteomyelitis (SBO) following malignant otitis externa (MOE) is not common but can be a debilitating condition. Appropriate and early diagnosis is crucial for preventing morbidity and mortality. Cranial nerves paresis and atlantoaxial instability are rare manifestation and are in favor of skull base involvement. [ABSTRACT FROM AUTHOR]

Abstract Skull base osteomyelitis is a rare but dangerous consequence of untreated malignant otitis externa. Pseudomonas aeruginosa is responsible for most cases with typical presentation. Here, we discuss a diabetic 54‐year‐old female presented with malignant otitis externa and bilateral facial paresis followed by cervical spondylitis and C1‐C2 instability. Skull base osteomyelitis confirmed by clinical presentation, imaging, and laboratory data. Fortunately, she responded well to antibacterial and antifungal therapy. Due to limited data, there is no confirmed standard of treatment for cervical instability secondary to SBO. It seems antibiotic therapy is the mainstay of treatment. In case of poor response to antibiotic therapy, surgical intervention is inevitable. This article introduces the first case of SBO‐related AAI successfully managed with conservative treatment.

Introduction: Rheumatoid arthritis (RA) is a chronic autoimmune connective tissue disease characterized by symmetrical arthritis associated with extra-articular changes. Although peripheral joint involvement is the dominant symptom of RA, many patients develop cervical spine involvement in the course of the disease, manifesting as cervical instability. Aim: The aim of this study is to describe a case of an RA patient with spinal myelopathy to increase awareness of this complication, hoping that its early diagnosis may prevent further serious consequences. Case study: A 63-year-old patient, who was diagnosed with RA 18 years ago, was admitted to the Rheumatology Clinic due to suspected exacerbation of rheumatic disease. Functional X-Ray and MRI was performed, which showed instability in the C3-C4 segment with spinal cord compression. Subsequently, the patient underwent cervical spine surgery. After the surgery and rehabilitation, the patient demonstrated neurological improvement. Results and discussion: Every patient diagnosed with RA should be educated about the possibility of a complication of cervical instability and be familiar with the neurological symptoms that may result from it. If cervical instability and subsequent cervical myelopathy are detected early, the symptoms may be reversible or significantly reduced by surgical spinal cord decompression and cervical stabilization. Conclusions: It is very important to perform a functional X-ray of the cervical spine to exclude instability, especially before rehabilitation treatment. Neck pain in patients diagnosed with RA may indicate cervical instability that requires more thorough neurological examination to exclude cervical myelopathy. [ABSTRACT FROM AUTHOR]

Purpose: Rheumatoid arthritis (RA) affecting the cervical spine results in instability and deformity that can be divided into the subtypes C1–C2 horizontal (atlantoaxial instability), C0–C2 vertical (basilar invagination), subaxial, and combined instabilities. The aim of this study was to compare the surgical treatments and outcomes of RA-related deformity and instability in a population-based setting. Patients and Methods: All patients with RA in the national Swespine register from January 1, 2006, to March 20, 2019, were assessed. Baseline characteristics, surgical treatments, European Myelopathy Scale (EMS), Neck Disability Index, the Visual Analog Scale for neck and arm pain as well as pre- and postoperative imaging were analyzed. The follow-up time points were at 1-, 2-, and 5 years after surgery. Results: A total of 176 patients were included. There were 62 (35%) patients with C1–C2 horizontal instability, 48 (27%) with C0–C2 vertical instability, 19 (11%) patients with subaxial instability, 43 (24%) patients with combined instability, and 4 patients without instability served as controls. The EMS improved in the C1–C2 horizontal instability group after fusion surgery (Δ =2.6 p) but remained within baseline confidence intervals in the other groups. All patients regardless of instability improved in pain. The subaxial instability had the highest risk of death within 5 years after surgery (11/19, 58%). The most dangerous complications due to implant failure were seen in patients instrumented with laminar hooks. Conclusion: The neurological outcome after fusion surgery is poor and the death rate is high in patients with cervical RA-related instability and deformity.

Abstract Background Disorders of the spine present a common and difficult management concern in patients with skeletal dysplasia. Due to the rarity of these conditions however, the literature, largely consisting of small, single institution case series, is sparse in regard to well-designed studies to support clinical decision making in these situations. Methods Using the Delphi method, an international, multi-disciplinary group of individuals, with significant experience in the care of patients with skeletal dysplasia, convened to develop multi-disciplinary, “best practice” guidelines in the care of spinal disorders in patients with skeletal dysplasia. Results Starting with 33 statements, the group a developed a list of 31 “best practice” guidelines. Conclusions The guidelines are presented and discussed to provide context for clinicians in their decision making in this often-challenging realm of care.

Objective: Cervical pedicle screw (CPS) fixation is widely used for the treatment of cervical spinal instability from various causes; however, there are few reports on the long-term outcomes of this procedure. The present study evaluated the 10-year results of CPS fixation for cervical instability. Methods: The medical records of 13 consecutive patients who underwent computer-guided CPS fixation for cervical instability were reviewed. The mean observation period was 153 months. Evaluated items included Japanese Orthopaedic Association (JOA) score and C2-7 lordotic angle before surgery and at 5 and 10 years afterwards. Visual analog scale (VAS) scores for neck pain and radiological evidence of adjacent segment degeneration (ASD) at 10 years of follow-up were also assessed. Results: Mean JOA score significantly improved from 9.4 points before surgery to 13.2 points at 5 years after surgery (p

Purpose: Rheumatoid arthritis (RA) affecting the cervical spine results in instability and deformity that can be divided into the subtypes C1-C2 horizontal (atlantoaxial instability), C0-C2 vertical (basilar invagination), subaxial, and combined instabilities. The aim of this study was to compare the surgical treatments and outcomes of RA-related deformity and instability in a population-based setting. Patients and Methods: All patients with RA in the national Swespine register from January 1, 2006, to March 20, 2019, were assessed. Baseline characteristics, surgical treatments, European Myelopathy Scale (EMS), Neck Disability Index, the Visual Analog Scale for neck and arm pain as well as pre- and postoperative imaging were analyzed. The follow-up time points were at 1-, 2-, and 5 years after surgery. Results: A total of 176 patients were included. There were 62 (35%) patients with C1-C2 horizontal instability, 48 (27%) with C0-C2 vertical instability, 19 (11%) patients with subaxial instability, 43 (24%) patients with combined instability, and 4 patients without instability served as controls. The EMS improved in the C1-C2 horizontal instability group after fusion surgery (Δ =2.6 p) but remained within baseline confidence intervals in the other groups. All patients regardless of instability improved in pain. The subaxial instability had the highest risk of death within 5 years after surgery (11/19, 58%). The most dangerous complications due to implant failure were seen in patients instrumented with laminar hooks. Conclusion: The neurological outcome after fusion surgery is poor and the death rate is high in patients with cervical RA-related instability and deformity. [ABSTRACT FROM AUTHOR]

Purpose: To review the literature, analyze and discuss diagnostic and treatment options for the Bowhunter Syndrome. A clinical case of idiopathic rotatory C1-C2 subluxation causing dynamic vertebral artery occlusion is presented. Methods: Literature review between 1960 and 2019, discussion of diagnostic methods and treatment options. Description of diagnostic and treatment methods in the aforementioned case. Results: We present a patient with dynamic left vertebral artery occlusion associated with idiopathic rotatory C1-C2 subluxation. A dynamic Angio-CT showed rotatory C1-C2 subluxation with significant flow reduction at the left vertebral artery at the exit of the C2 transverse foramen until the V3 segment when the head rotated towards the right. Due to clinical and radiological worsening in the following months, posterior C1-C2 arthrodesis was performed, with the disappearance of the symptoms. There are 193 cases reported with dynamic vertebral artery occlusion, but in only two, the etiology was primary rotational atlantoaxial instability. The most prevalent etiology was degenerative. Conclusion: Rotatory vertebral artery occlusion is a rare condition presented mostly in adults, aged 50–70 years. Vertebrobasilar insufficiency is triggered by the rotation of the head to the contralateral side of the dominant vertebral artery. Dynamic subtraction angiography is considered the diagnostic gold-standard method, but dynamic Angio-CT scan, Angio-MRI, or Doppler ultrasonography are less invasive options. The treatment options are conservative or surgical. Endovascular surgery is another option in specific cases. [ABSTRACT FROM AUTHOR]

The outcomes of conservative and operative treatment of os odontoideum in children remain unclear. Our objective was to study the outcomes of conservative and surgical treatment of idiopathic os odontoideum in children and compare these outcomes in age- and treatment-matched nonidiopathic children with os odontoideum. A retrospective multicenter review identified 102 children with os odontoideum, of whom 44 were idiopathic with minimum 2-year follow-up. Ten patients were treated conservatively, and 34 underwent spinal arthrodesis. Both groups were matched with nonidiopathic patients by age and type of treatment. Cervical arthrodesis was recommended for patients with increased atlantoaxial distance or reduced space available for the cord in flexion-extension radiographs. All 20 children undergoing conservative treatment remained asymptomatic during follow-up, but 1 nonidiopathic patient developed cervical instability. The idiopathic group had significantly less severe radiographic cervical instability and less neurologic complications than the nonidiopathic group (P < 0.05 for all comparisons). Thirty-three (97%) patients in the idiopathic group and 32 (94%) patients in the nonidiopathic group (94%) had spinal fusion at final follow-up (P = 0.55). The risk of complications (15% vs. 41%; odds ratio 0.234, 95% confidence interval 0.072–0.757, P = 0.015) and nonunion (6% vs. 24%; odds ratio 0.203, 95% confidence interval 0.040–0.99, P = 0.040) were significantly lower in the idiopathic than in the nonidiopathic group. Idiopathic children undergoing rigid fixation achieved spinal fusion. Idiopathic patients with stable atlantoaxial joint at presentation remained asymptomatic and intact during conservative treatment. Idiopathic children with os odontoideum undergoing spinal arthrodesis had significantly fewer complications and nonunion than nonidiopathic children. III [ABSTRACT FROM AUTHOR]

Introduction: The laminar screw method was popularized during recent years. Since no data exist in the literature on its suitability for subaxial levels in the pediatric population, a radiologic anatomical study was planned to evaluate the suitability of the laminae for laminar screws in children. Methods: The laminar thicknesses from C3 to C7 were measured in axial sections in 120 pediatric patients using computed tomography. The patients were divided into 3 age-groups: ages 4–6, 7–9, and 10–12. Each age-group consisted of 20 boys and 20 girls. The suitability of the laminae was evaluated for 3.5-mm-thick commercially available screws and also for the 3-mm screws that could be produced in the future. If the height of the base of the spinous process is ≥ 9 mm, the segment was accepted as suitable for the bilateral screw, and ≥5 mm is for the unilateral screw. Additionally, laminar thickness and length were measured for possible short screws longer than 15 mm in the laminae that were distally thin but proximally thick. Results: The C4 and C5 levels had the thinnest (2.77 ± 0.6 mm and 2.81 ± 0.6 mm, respectively) and C7 had the thickest laminae (4.66 ± 0.6 mm) in all age-groups. No significant differences were found between boys and girls and right and left laminae. According to the age-groups, an increase in laminar thickness was possible by growing, but only C7 laminae thickness was statistically different between 10–12 and 4–6 age-groups (p < 0.001). The last rate of the suitability was 9.1% for the 3.5-mm-thick screws and 13.75% for the 3-mm-thick screws after deletion of the bilateral insertion due to the short base of the spinous process and adding the possible short screws in the distally thin but proximally thick laminae. The rates increased with age, but the only statistically significant difference was found between 4–6- and 10–12-year-old age-groups (p < 0.001). Conclusions: Laminar screws may be suitable for some levels of C7, C6, and C3 even in the young pediatric population. The use of thinner screws (3 mm) may increase the suitability rate. Therefore, laminar screw choice may be considered as a salvage method in pediatric patients, and all laminae may be evaluated individually for suitability. This study did not evaluate the safety and efficacy of the method in children, and these issues must be studied further. [ABSTRACT FROM AUTHOR]

Objective: Craniovertebral junction (CVJ) abnormalities are common and well documented in mucopolysaccharidosis type I-Hurler syndrome (MPS IH), often causing severe spinal canal narrowing. However, the requirement for surgical decompression and/or fusion is uncommon. Although hematopoietic cell transplant (HCT) has been shown to prolong the lives of patients with MPS IH, its effect in halting or reversing musculoskeletal abnormalities is less clear. Unfortunately, there are currently no universal guidelines for imaging or indication for surgical interventions in these patients. The goal of this study was to track the progression of the CVJ anatomy in patients with MPS IH following HCT, and to examine radiographic features in patients who needed surgical intervention., Methods: Patients with MPS IH treated at the University of Minnesota with allogeneic HCT between 2008 and 2020 were retrospectively reviewed. Patients who underwent CVJ surgery were identified with chart review. All MPS IH cervical scans were examined, and the odontoid retroflexion angle, clivoaxial angle (CXA), canal width, and Grabb-Oakes distance (pB-C2) were measured yearly for up to 7 years after HCT. Longitudinal models based on the measurements were made. An intraclass correlation coefficient was used to measure interrater reliability. Nine children without MPS IH were examined for control CVJ measurements., Results: A total of 253 cervical spine MRI scans were reviewed in 54 patients with MPS IH. Only 4 (7.4%) patients in the study cohort required surgery. Three of them had posterior fossa and C1 decompression, and 1 had a C1-2 fusion. There was no statistically significant difference in the spinal parameters that were examined between surgery and nonsurgery groups. Among the measurements, canal width and CXA varied drastically in patients with different neck positions. Odontoid retroflexion angle and CXA tended to decrease with age. Canal width and pB-C2 tended to increase with age., Conclusions: Based on the data, the authors observed an increase in canal width and pB-C2, whereas the CXA and odontoid retroflexion angle became more acute as the patients aged after HCT. The longitudinal models derived from these data mirrored the development in children without MPS IH. Spinal measurements obtained on MR images alone are not sufficient in identifying patients who require surgical intervention. Symptom monitoring and clinical examination, as well as pathological spinal cord changes on MRI, are more crucial in assessing the need for surgery than is obtaining serial imaging.

Introduction: The aim of the study was to evaluate the risk factors for cervical instability in rheumatoid arthritis (RA)., Material and Methods: Computer searches were conducted in PubMed, Embase, Cochrane Library, the China National Knowledge Infrastructure (CNKI) database, the Wan Fang database, the Chinese Scientific Journal Databases (VIP) database, and the Chinese Biomedical Literature database (CBM) from their establishment until November 2022., Results: A total of 8 articles were included in this study, including 1 cross-sectional study, 5 case-control studies, and 2 cohort study, including 3078 patients with RA. Meta-analysis results showed that: male sex (OR = 1.70, 95% CI: 1.19-2.42), course of disease (OR = 1.72, 95% CI: 1.29-2.28), long-term glucocorticosteroid use (OR = 2.84, 95% CI: 1.97-2.40), Steinbrocker staging (OR = 2.30, 95% CI: 1.61-3.28), disability at baseline (OR = 24.57, 95% CI: 5.51-109.60), peripheral joint destruction (OR = 2.24, 95% CI: 1.56-3.21), Steinbrocker stage I-IV progression to disability (OR = 20.08, 95% CI: 4.18-96.53), and previous joint surgery (OR = 1.54, 95% CI: 1.06-2.26) are the main risk factors for cervical instability in RA., Conclusions: There are many risk factors for cervical instability in RA. In clinical practice, special attention should be paid to patients who are male, have a longer course of disease, have long-term glucocorticosteroid use, have previous joint surgery, have peripheral joint damage, and develop disability in Steinbrocker stage I-IV. Attention should be paid to the high-risk groups mentioned above, and effective measures such as early screening and full monitoring should be taken to prevent the occurrence of cervical instability in RA., Competing Interests: The authors declare no conflict of interest., (Copyright: © 2024 Termedia & Banach.)

Objective: To study the distribution of sympathetic nerves of the ligamentum flavum (LF), confirm its existence by histological observation and nuclear magnetic resonance spectroscopy, and analyze the relationship between sympathetic nerve fibers and the biomechanical structure of the LF. Methods: Randomly controlled scientific research selected 15 cases of posterior surgery in the affiliated hospital of Qingdao University from January 2013 to December 2019. The average age was 67.5 ± 14.5 years old, eight males and seven females. The LF specimens (completely separated fresh tissue) of different segments (C3‐7) were taken during the operation. Two pages of LF specimens on the left and right sides of the same segment are randomly allocated by the pairing method for formalin fixation and cryopreservation in liquid nitrogen. LF specimens extracted from seven other adult cadaver specimens (average age at death of about 56.8 ± 4.0 years, three males and four females) were used as a control group; together with formalin‐ fixed specimens obtained during surgery, 3D slices were given layer by layer. The distribution of sympathetic nerves in different parts of the LF was analyzed by glyoxylic acid‐induced biological monoamine fluorescent technique (SPG) and hematoxylin–eosin (HE) staining. Fifteen liquid nitrogen storage specimens were divided into the back of the LF and the spinal canal through frozen sections, and were analyzed by nuclear magnetic resonance spectroscopy‐hydrogen spectrum (1H ‐NMR) for neurotransmitters and neurometabolites. Results: There were type C sympathetic nerve fibers in the LF, which were divided into linear shape (α) and wave shape (β). Experimental group (χ2 = 1.705, P > 0.05) and control group (χ2 = 0.879, P > 0.05) can detect no difference in fluorescence units. Nerve fiber transmitter metabolites choline (Cho), creator (Cr), γ‐aminobutyric acid (GABA) also indicate that the sympathetic nerve is present in the LF. LF sympathetic nerve fibers were mainly distributed in the proximal spinal canal surface, nerve fibers on the medial belt (area II) were fewer than the lateral belt (area I) (W = 210, P < 0.05). The 1HNMR spectrum of LF spinal canal PG / Cho (t = 8.721, P < 0.05), GABA (t = 16.01, P < 0.05) value increased, lactic acid (Lac) / Cr (t = 4.213, P < 0.05), Cho / Cr (t = 2.402, P < 0.05) value decreased, indicating that nerve fibers are actively metabolized on the surface of the spinal canal, mainly distributed in tube surface. βtype fibers were more often distributed around microvessels. A small amount of α type fibers went next to the vascular structures, while α type fibers and β type fibers go cross within LF. Two patients with vertebral artery dissection had no recurrence of sympathetic symptoms within a total of 12 follow‐ups 2 years after discharge. Conclusions: There are many sympathetic nerve fibers distributed on LF, and their distribution may be correlated with histological and mechanical characteristics of LF. It may also be the anatomical basis of cervical vertigo. [ABSTRACT FROM AUTHOR]

Background: Disorders of the spine present a common and difficult management concern in patients with skeletal dysplasia. Due to the rarity of these conditions however, the literature, largely consisting of small, single institution case series, is sparse in regard to well-designed studies to support clinical decision making in these situations.Methods: Using the Delphi method, an international, multi-disciplinary group of individuals, with significant experience in the care of patients with skeletal dysplasia, convened to develop multi-disciplinary, "best practice" guidelines in the care of spinal disorders in patients with skeletal dysplasia.Results: Starting with 33 statements, the group a developed a list of 31 "best practice" guidelines.Conclusions: The guidelines are presented and discussed to provide context for clinicians in their decision making in this often-challenging realm of care. [ABSTRACT FROM AUTHOR]

Purpose: To investigate the effect of C3/4 disc degeneration on cervical spondylosis with dizziness (CSD) and to assess the curative effect of anterior cervical decompression and fusion (ACDF) in patients with CSD.Method: Four hundred nineteen patients who underwent ACDF for treatment of myelopathy or radiculopathy were divided into dizziness and non-dizziness group. The visual analog scale (VAS) score and Japanese Orthopaedic Association (JOA) score were used to determine the intensity of dizziness and neurological symptoms, respectively. Cervical disc degeneration was evaluated using Miyazaki's classification system. Some parameters were measured using cervical radiographs. The surgical effects on CSD were compared between surgery with and without C3/4 level. Multivariate logistic regression analysis was used to determine the risk factors for CSD.Results: The pre-operative incidence of CSD was 33.9%. Women were more likely to develop dizziness than men (p < 0.05), CSD was significantly associated with C3/4 disc degeneration (69.7%, p < 0.001), and smokers were more subject to dizziness (p < 0.05). Regression analysis showed that female (OR = 1.611, p = 0.031), smoking (OR = 1.719, p = 0.032), Miyazaki grade of C3/4 ≥ IV (OR = 2.648, p < 0.001), and instability on C3/4 (OR = 1.672, p = 0.024) were risk factors for CSD. Treatment of CSD by ACDF involving C3/4 was more effective than not involving C3/4 (efficacy rate, 73.2% vs 51.7%, p < 0.05).Conclusion: The CSD is a common clinical manifestation in elderly patients, especially patients with cervical spondylosis at the C3/4 level. Female, smoking, instability on C3/4, and C3/4 Miyazaki grade ≥ IV could be considered significant risk factors for CSD. CSD is more likely to be alleviated by ACDF involving C3/4. [ABSTRACT FROM AUTHOR]

A 3-year-old male with no past medical history presented with flaccid plegia of his upper extremities and significant weakness in his lower extremities after wrestling with his brother. Cervical spine magnetic resonance imaging was consistent with cord edema and intraparenchymal hemorrhage at C1-C2. A nonossified tissue mass at the expected location of the upper dens created narrowing of the canal at the C1-2 level and mass effect on the cord. Head computed tomography showed periventricular leukomalacia. Initial findings favored dysplasia of the odontoid with associated soft tissue mass/pannus caused by a possible underlying genetic or metabolic bone dyscrasia. The patient underwent suboccipital craniotomy/C1 laminectomy and occiput to C4 fusion, for decompression and stabilization. Genetic testing showed a COL2A1 collagen disorder, with the child harboring a de novo mutation for c.3455 G>T (p.G1152V). The patient was discharged to inpatient acute rehabilitation, with gradual improvement in strength in all 4 extremities. [ABSTRACT FROM AUTHOR]

Objetivos: Evaluar los resultados postoperatorios de una serie de pacientes pediátricos menores de 10 años sometidos a fusión cervical instrumentada, descripción de la técnica quirúrgica y complicaciones. Introducción: La instrumentación de la columna cervical pediátrica ha ganado terreno en la última década. Las diferencias anatómicas y biomecánicas entre la columna cervical pediátrica y del adulto hacen que la cirugía requiera de una minuciosa preparación preoperatoria toda vez que se utilizan implantes diseñados para adultos. Métodos: Se evaluaron 28 pacientes con patología cervical tratados con fusión instrumentada utilizando las técnicas descriptas por Roy-Camille y Magerlpara masas laterales, de Goel-Harms para C1-C2, y las fusiones occípito-cervicales con placas occipitales o rótulas. Los criterios de inclusión: menores de 10 años, cirugía primaria con un seguimiento mínimo de 2 años. Resultados: Obtuvimos una muestra de 17 mujeres y 11 hombres con un seguimiento promedio de 3,8 años (2-10). La edad promedio fue 6,1 años (1,6-10). Existió una tasa promedio de complicaciones generales del 32.1%. Las patologías que más complicaciones registraron fueron: síndromes genéticos 6 casos (21,4%), junto a las displasias esqueléticas 3 casos (10,7%). 13 pacientes fueron menores de 6 años, 7 de ellos presentaron complicaciones (53,8%). Conclusión: La instrumentacion cervical en pacientes menores de 10 años demostró ser un procedimiento factible y seguro. Las displasias vertebrales, anomalías congénitas y sindrómicas, sumado al factor edad menores de 6 años, son las principales variables asociadas a las complicaciones obtenidas. Trabajo descriptivo retrospectivo Nivel IV

Headache is a frequent symptom among patients with hypermobility spectrum disorders. This mini review focuses specifically on a challenging aspect of headache evaluation in all patients, but especially those with hypermobility - the orthostatic headache. While the differential for an orthostatic headache is overall limited, patients with hypermobility disorders have risk factors for all of the most commonly encountered orthostatic headache disorders. The most common conditions to produce orthostatic headaches are discussed - spontaneous intracranial hypotension, cervicogenic headache, and postural orthostatic tachycardia syndrome. Less common etiologies of orthostatic headache pertinent to any patient are presented in table format., Competing Interests: The author declares that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Fermo.)

Copyright of Operative Orthopädie und Traumatologie is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In contrast to a one-level cervical corpectomy, a multilevel corpectomy without posterior fusion is accompanied by a high material failure rate. So far, the adequate surgical technique for patients, who receive a two-level corpectomy, remains to be elucidated. The aim of this study was to determine the long-term clinical outcome of patients with cervical myelopathy, who underwent a two-level corpectomy. Outcome parameters of 21 patients, who received a two-level cervical corpectomy, were retrospectively analyzed concerning reoperations and outcome scores (VAS, Neck Disability Index (NDI), Nurick scale, modified Japanese Orthopaedic Association score (mJOAS), Short Form 36-item Health Survey Questionnaire (SF-36)). The failure rate was determined using postoperative radiographs. The choice over the surgical procedures was exercised by every surgeon individually. Therefore, a distinction between two groups was possible: (1) anterior group (ANT group) with a two-level corpectomy and a cervical plate, (2) anterior/posterior group (A/P group) with two-level corpectomy, cervical plate, and additional posterior fusion. Both groups benefitted from surgery concerning pain, disability, and myelopathy. While all patients of the A/P group showed no postoperative instability, one third of the patients of the ANT group exhibited instability and clinical deterioration. Thus, a revision surgery with secondary posterior fusion was needed. Furthermore, the ANT group had worse myelopathy scores (mJOASANT group = 13.5 ± 2.5, mJOASA/P group = 15.7 ± 2.2). Patients with myelopathy, who receive a two-level cervical corpectomy, benefitted from surgical decompression. However, patients with a sole anterior approach demonstrated a very high rate of instability (33%) and clinical deterioration in a long-term follow-up. Therefore, we recommend to routinely perform an additional posterior fusion after two-level cervical corpectomy. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Physical Medicine & Rehabilitation Sciences is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: Occipitocervical distraction injuries (OCDI) in children occur on a wide spectrum of severity, and decisions about treatment suffer from a lack of rigorous guidelines and significant inter-institutional variability. While clear cases of frank atlanto-occipital dislocation (AOD) are treated with surgical stabilization, the approach for less severe cases of OCDI is not standardized. These patients require a careful assessment of both radiographic and clinical criteria, as part of a complex risk-benefit analysis, to establish whether occipitocervical fusion (OCF) is indicated. Here, we performed a systematic review of the literature that describes traumatic OCDI in children < 18 years of age. Summary: We performed a systematic review, according to PRISMA guidelines, of children < 18 years of age presenting with traumatic etiologies of OCDI. We searched PubMed to identify papers congruent with these criteria. Exclusion criteria included (1) reports on atraumatic causes of OCDI and (2) studies with insufficient clinical and radiographic details on individual patients. We identified 16 reports describing a total of 144 patients treated for pediatric traumatic OCDI. Based on the synthesis of these findings and the collective experience of the authors, we present the demographic, clinical, and radiographic factors that underlie OC instability, which we hope will serve as components of a grading system in the future. We considered various clinical and radiographic findings including: (1) the mechanism of injury, (2) the patient's age, (3) CT/CT angiography of head and neck findings and parameters, (4) MRI findings, and (5) neurological exam, for the purpose of determining the severity of the OCDI and offering treatment guidelines based on the summative risk of underlying OC instability. Key Messages: OCDI is a potentially devastating injury, especially in children. Although missing the diagnosis can have potentially catastrophic consequences, reverting to surgical fixation in less severe cases can subject children to unnecessary operative risk and permanently reduce their range of motion. After reviewing all the available reports of pediatric traumatic OCDI in the neurosurgical literature, we propose an outline of clinical and radiographic factors influencing underlying OC instability that could be incorporated into a grading scale to guide treatment. We hope this study stimulates discussion on the standardization of treatment for pediatric OCDI. [ABSTRACT FROM AUTHOR]

Background: Ossification of the nuchal ligament (ONL) caused by chronic injury to the nuchal ligament (NL) is very common in instability-related cervical disorders.Purpose: To determine possible correlations between ONL, sagittal alignment, and segmental stability of the cervical spine.Material and Methods: Seventy-three patients with cervical spondylotic myelopathy (CSM) and ONL (ONL group) and 118 patients with CSM only (control group) were recruited. Radiographic data included the characteristics of ONL, sagittal alignment and segmental stability, and ossification of the posterior longitudinal ligament (OPLL). We performed comparisons in terms of radiographic parameters between the ONL and control groups. The correlations between ONL size, cervical sagittal alignment, and segmental stability were analyzed. Multivariate logistic regression was used to identify the independent risk factors of the development of ONL.Results: C2-C7 sagittal vertical axis (SVA), T1 slope (T1S), T1S minus cervical lordosis (T1S-CL) on the lateral plain, angular displacement (AD), and horizontal displacement (HD) on the dynamic radiograph increased significantly in the ONL group compared with the control group. The size of ONL significantly correlated with C2-C7 SVA, T1S, AD, and HD. The incidence of ONL was higher in patients with OPLL and segmental instability. Cervical instability, sagittal malalignment, and OPLL were independent predictors of the development of ONL through multivariate analysis.Conclusion: Patients with ONL are more likely to have abnormal sagittal alignment and instability of the cervical spine. Thus, increased awareness and appreciation of this often-overlooked radiographic finding is warranted during diagnosis and treatment of instability-related cervical pathologies and injuries. [ABSTRACT FROM AUTHOR]

Psoriatic arthritis (PsA) is a chronic inflammatory arthritis associated with psoriasis. While psoriasis is seen in 1-2% of the general population, PsA is seen in 6-40% of psoriasis patients. In 70% of patients with PsA, the cervical spine is affected and myelopathy develops. The case presented is that of a patient with non-traumatic, upper cervical instability on the basis of PsA, who was diagnosed of myelopathy and was treated surgically. [ABSTRACT FROM AUTHOR]

Objective: To determine the clinical efficacy of different manipulation in the treatment of cervical instability in young people, and to analyze the risk factors of relapse of cervical instability in young people., Methods: From March 2021 to June 2022, the clinical data of 120 young patients with cervical instability were retrospectively analyzed. According to the different treatment methods, they were divided into rotation group (60 cases, 3 cases of loss) and tendon group (60 cases, 5 cases of loss). There were 25 males and 32 females in rotation-traction manipulation group;age ranged from 22 to 44 years old with a median of 28 years old;course of disease ranged from 0.17 to 120 months with amedian of 22 months. There were 22 males and 33 females in tendon-regulating manipulation group;age ranged from 21 to 42 years old with a median of 27 years old;course of disease ranged from 0.23 to 180 months with a median of 24 months. Both groups were treated for 2 weeks, once every other day for 7 times, and were followed up for 1 year. The clinical efficacy of the two groups was evaluated, and the visual analogue scale (VAS), neck disability index (NDI) were observed before and after treatment. One year after the course of treatment, patients with effective treatment were followed up to make statistics on recurrence. Patients with recurrence were included in the recurrence group, while those without recurrence were included in the non-recurrence group. Factors that may affect symptom recurrence were analyzed, and univariate and multivariate Logistic regression analysis were performed., Results: The 13 patients who failed the treatment (4 cases in the rotation-traction manipulation group and 9 cases in the tendon-regulating manipulation group) were not followed up. All the 99 patients who were effective in treatment were followed up ranged from 303 to 406 days with a median of 359 days. No complications occurred in all patients. There were significant differences in VAS and NDI between the two groups after treatment and before treatment ( P <0.05), and there were significant differences in VAS and NDI between the two groups after treatment ( P <0.05). Ninety-nine patients achieved follow-up, 56 (56.57%) relapsed and 43 (43.43%) did not. Univariate correlation analysis showed that NDI index, the time spent at the desk every day, the time spent using electronic products every day and angular displacement of anterior flexion before treatment in the relapse group were significantly higher than those in the non-relapse group ( P <0.05). Logistic regression analysis showed that the time spent at the desk every day [ OR =2.447, 95%CI(1.255, 4.771)], the time spent using electronic products every day [ OR =1.892, 95%CI(1.066, 3.358)] and the angular displacement of anterior flexion of the cervical before treatment [ OR =1.246, 95%CI(1.045, 1.485) ]were the risk factors for relapse., Conclusion: Both rotation-traction manipulation and tendon-regulating manipulation can effectively treat cervical instability in young people, and rotation-traction manipulation has more advantages than tendon-regulating manipulation in improving cervical pain and cervical dysfunction in patients. The time spent at the desk every day, the time spent using electronic products every day, and the increase of cervical flexion angle displacement will increase the risk of relapse in patients.