Reverse sigmoid type of cervical kyphosis. Note: at least one of the upper cervical centroids is posterior to, and at least one of the lower cervical centroids is anterior to, the C2-C7 centroid line, and the distance between the C2-C7 centroid line and at least one centroid is 2 mm. 

Reverse sigmoid type of cervical kyphosis. Note: at least one of the upper cervical centroids is posterior to, and at least one of the lower cervical centroids is anterior to, the C2-C7 centroid line, and the distance between the C2-C7 centroid line and at least one centroid is 2 mm. 

Source publication
Article
Full-text available
Objective This retrospective study investigated the incidence and risk factors of poor clinical outcomes after cervical surgery for cervical spinal cord injury in a large population of patients with global or segmental cervical kyphosis. Methods The clinical and radiological evaluation results of 269 patients with cervical kyphosis who underwent e...

Similar publications

Preprint
Full-text available
Quantitative diffusion MRI (dMRI) is a promising technique for evaluating the spinal cord in health and disease. However, low signal-to-noise ratio (SNR) can impede interpretation and quantification of these images. The purpose of this study is to evaluate a denoising approach, Patch2Self, to improve the quality, reliability, and accuracy of quanti...
Article
Full-text available
Objective A major challenge in multiple sclerosis (MS) research is the understanding of silent progression and Progressive MS. Using a novel method to accurately capture upper cervical cord area from legacy brain MRI scans we aimed to study the role of spinal cord and brain atrophy for silent progression and conversion to secondary progressive dise...
Article
Full-text available
Diffusion tensor imaging plays an important role in the accurate diagnosis and prognosis of spinal cord diseases. However, because of technical limitations, the imaging sequences used in this technique cannot reveal the fine structure of the spinal cord with precision. We used the readout segmentation of long variable echo-trains (RESOLVE) sequence...
Article
Full-text available
Purpose: To compare the accuracy of fractional anisotropy (FA) and apparent diffusion coefficient (ADC) values between reduced FOV or so-called zonally oblique multislice (ZOOM) and conventional diffusion tensor imaging (DTI) in the cervical spinal cord. Methods: Both ZOOM and conventional DTI were performed on 10 healthy volunteers. Intraclass...
Article
Full-text available
We studied a consecutive series of 58 patients with penetrating missile injuries of the brachial plexus to establish the indications for exploration and review the results of operation. At a mean of 17 weeks after the initial injury, 51 patients were operated on for known or suspected vascular injury (16), severe persistent pain (35) or complete lo...

Citations

... 10 Specifically, two lines were drawn parallel to the vertebral posterior margins of C2 and C7, and CSA was defined as the angle between the intersection of the two lines ( Figure 1A,F). Cervical range of motion (ROM) was measured as follows 11 : the trailing edge lines at C2 and C7 were measured in the flexed (a 1 ) and hyperextended (a 2 ) positions. ROM was defined as a 1 + a 2 . ...
Article
Full-text available
Objective: For reconstructing the posterior cervical muscular-ligament complex, attachment points and various modified techniques were designed and applied in clinical practice. This study investigated the clinical and radiographic outcomes of open door laminoplasty with modified centerpiece mini-plate fixation and extensor attachment point reconstruction in the treatment of cervical spondylotic myelopathy (CSM). Methods: Sixty-nine patients with CSM who underwent C3-C7 open door laminoplasty at our hospital from January 2016 to May 2018 were divided into two groups: 37 and 32 patients underwent laminoplasty with modified and conventional centerpiece titanium plate fixation (MPF and CPF groups), respectively. Changes in cervical spinal angle (CSA), cervical range of motion (ROM), posterior cervical muscle atrophy, neurological function (Japanese Orthopaedic Association [JOA] score), Neck Disability Index (NDI), and axial symptom severity were compared between the two groups. Results: There were no significant differences in operative duration (136.7 ± 23.9 vs 128.3 ± 21.5 min, t = 1.525, p > 0.05), volume of intraoperative blood loss (275.9 ± 33.1 vs 268.2 ± 31.6 ml, t = 0.984, p > 0.05), lamina open angle (41.2° ± 4.5° vs 39.4° ± 4.1°, t = 1.726, p > 0.05), and spinal cord drift distance (2.4 ± 0.3 vs 2.3 ± 0.4 mm, t = 1.184, p > 0.05) between the two groups. After surgery, JOA score significantly increased (p < 0.05), and neurological recovery rates were similar (62.7% vs 63.4%, t = 0.208, p > 0.05). The NDI score was significantly decreased in both the groups (p < 0.05); however, the MPF group recovered to a greater degree than the CPF group (8.3 ± 1.2 vs 9.8 ± 1.4) (t = 4.793, p < 0.05). There was no significant change in cervical ROM postoperatively compared with preoperatively in either group (p > 0.05). CSA decreased from 21.7° ± 2.8° to 18.3° ± 2.1°, and posterior cervical muscle cross-sectional area decreased from 35.2 ± 4.9 cm2 to 31.0 ± 4.1 cm2 in the CPF group (p < 0.05), but no significant change was observed in the MPF group (20.6° ± 2.5° to 20.4° ± 2.6°and 35.9 ± 5.1 to 34.1 ± 4.6 cm2 , respectively) (p > 0.05). Postoperative axial symptom severity was significantly worse in the CPF group than in the MPF group (Z = -2.357, p < 0.05). Conclusions: As an improvement to the conventional titanium plate, the modified centerpiece titanium plate effectively provides an attachment point for the posterior muscle-ligament complex, reducing posterior cervical muscle atrophy and improving neck function, without inflicting additional surgical trauma.
... Cervical curvature was evaluated by the cervical spine angle (CSA) using Harrison's method [10]: two lines were drawn parallel to the vertebral posterior margins of C2 and C7 and CSA was de ned as the angle between the intersection of the two lines ( Figure 1A,1F). Cervical range of motion (ROM) was measured as follows [11]: the trailing edge lines at C2 and C7 were measured in the exion and extension positions with a 1 representing the exion position and a 2 the hyperextension position; ROM was de ned as a 1 + a 2 . ...
Preprint
Full-text available
Objective This retrospective study aimed to investigate the clinical and radiographic outcomes of open-door laminoplasty with modified centerpiece mini-plate fixation and extensor attachment point reconstruction for treating cervical spondylotic myelopathy (CSM).Method Sixty-nine patients with CSM, who underwent C3-7 open-door laminoplasty in our hospital from January 2016 to May 2017, were divided into two groups: group A underwent surgery with a modified centerpiece titanium plate and group B underwent surgery with a conventional centerpiece titanium plate. Changes in cervical spinal angle (CSA), cervical range of motion (ROM), atrophy of posterior cervical muscles, and neurological function (Japanese Orthopaedic Association [JOA] score) and the occurrence of axial symptoms (AS) were compared between the groups.ResultThere were no significant differences in operative time, intra-operative blood loss, lamina open angle, and spinal cord drift distance between the groups. After the surgery, JOA score significantly increased (P < 0.05), neurological recovery rates were similar (62.7% vs. 63.4%), cervical ROM did not significantly change when compared with the preoperative level (P > 0.05) in both groups; CSA and cross-sectional area of the posterior cervical muscles decreased significantly in group B (P < 0.05) but not in group A (P > 0.05), and postoperative AS were significantly more severe in group B than in group A (P < 0.05).ConclusionOpen-door laminoplasty is an effective surgical procedure for CSM. The application of modified centerpiece mini-plate fixation effectively reconstructs the posterior extensor attachment points, which reduces posterior cervical muscle atrophy, maintains cervical curvature, and reduces the occurrence of axial symptoms.
... The most frequent cause of cervical SCI is violence-related injury. Moreover, the weight-bearing and flexible nature of vertebrae at the cervical level make it particularly susceptible to injury [1,2]. Clinical studies have shown that the incidence of cervical SCI in most countries ranges from 30 to 70 new cases per year, and lower cervical SCI (C3 to C7) accounts for approximately two-thirds of SCI with cervical fractures and three-quarters of SCI with cervical dislocations [3,4]. ...
Article
Full-text available
BACKGROUND The objective of the study was to identify risk factors for poor prognosis of cervical spinal cord injury (SCI) with subaxial cervical fracture-dislocation after surgical treatment. MATERIAL AND METHODS A total of 60 cervical SCI patients with subaxial cervical fracture-dislocation were primarily included in the study from April 2013 to April 2018. All the enrolled subjects received surgical treatment. The enrolled patients with complete follow-up record were divided into 2 groups based on the neural function prognosis: a non-functional restoration group and a functional restoration group. Multivariate regression analysis was performed to identify independent risk factors for poor prognosis of SCI after surgical treatment. RESULTS Fifty-five subjects were included in this study, and the follow-up time ranged from 8.5 to 44.5 months. A total of 25 subjects were categorized into the non-functional restoration group and 30 subjects into the functional restoration group. According to the results of multivariate regression analysis, time from injury to operation (more than 3.8 days), subaxial cervical injury classification (SLIC, score more than 7.5), and maximum spinal cord compression (MSCC, more than 55.8%) are independent risk factors for poor prognosis of SCI after surgical treatment (p<0.05), with AUCs of 0.95 (time from injury to operation), 0.91 (SLIC score), and 0.96 (MSCC). CONCLUSIONS Time from injury to operation (more than 3.8 days), SLIC score (more than 7.5), and MSCC (more than 55.8%) are independent risk factors for poor prognosis of SCI with subaxial cervical fracture-dislocation after surgical treatment.
... Розвиток сегментарної кіфотичної деформації прооперованого сегмента, окрім негативного впливу на біомеханіку всього хребта, часто призводить до збільшення інтенсивності больового синдрому, іноді -до критичної деформації, що компреметує невральні структури хребтового каналу [18][19][20]. ...
Article
Full-text available
Objective. To analyze the stability of anterior subaxial fusion in patients with various osteoligamentous lesions of the cervical spine with different types of stabilizing systems. Materials and methods. We have performed the analysis of the X-ray data of 80 patients with traumatic lesion of the cervical spine. As a criterion for the fusion stability, the segmental kyphosis index of the operated segment was used. The patients were divided into 2 groups, depending on the type of implanted fusion system. Each group was divided into subgroups according to Argenson et al. cervical spine lesion classification. The follow-up included the period before surgery, intraoperative period, 3-5 days after surgery, 3, 6 and 12-18 months after surgical treatment. Results. Our study revealed the statistically significant advantage of telescopic implant fusion system at a follow-up of 3 months for B and C Argenson type fractures. Starting from 6 months after the operation and further, with all types of lesion, the vertebral body replacement system provides greater stability in comparison with combination of the Mesh and ventral plate. Conclusions. The usage of a telescopic vertebral body replacement implant provides maximum preservation of the achieved correction of the segmental kyphosis of operated segment in patients with different types of fractures. Key words: cervical spine trauma; decompression and fusion surgery; type of lesion; fusion method