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Pereira-Duarte M, Dionne A, Joncas J, Parent S, Labelle H, Barchi S, Mac-Thiong JM. A classification algorithm for prioritizing surgery in Pediatric patients with idiopathic scoliosis when Long Surgical delays are expected. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2024:10.1007/s00586-024-08405-4. [PMID: 39096388 DOI: 10.1007/s00586-024-08405-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 07/08/2024] [Indexed: 08/05/2024]
Abstract
PURPOSE To identify the clinical phenotypes associated with the rate of progression while waiting for surgery and propose a classification scheme for identifying subgroups of patients to prioritize for surgery when long surgical delays are expected. METHODS We reviewed the clinical and radiographic data of a prospective cohort of patients scheduled for IS surgery from 2004 to 2020 with a minimum 1-year wait prior to surgery. Candidate predictors consisted of age, sex, Risser sign, menarchal status, angle of trunk rotation, scoliotic curve type, and main Cobb angle at baseline when scheduled for surgery. Univariate and Regression Tree analysis were performed to identify predictors associated with the annual curve progression rate in the main Cobb angle between baseline and surgery. RESULTS There were 214 patients (178 females) aged 15 ± 2 years, with a Risser sign 3.4 ± 1.6 and a main Cobb angle 55°±10° at baseline. The average wait prior to surgery was 1.3 ± 0.4 years. Only the Risser sign, menarchal status and sex were significantly associated with the annual progression rate. We have identified 3 clinically and significantly different groups of patients presenting slow (3 ± 4°/yr if Risser sign 3 to 5), moderate (8 ± 4°/yr if female with Risser sign 0 to 2 and post-menarchal), and fast (15 ± 10°/yr if Risser sign 0 to 2 and premenarchal or male) progression rates. CONCLUSION We present an evidence-based surgical prioritization algorithm for pediatric idiopathic scoliosis that can easily be implemented in clinical practice when long surgical delays are expected.
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Affiliation(s)
- Matias Pereira-Duarte
- Université de Montréal, Montréal, Canada
- Research Center, Sainte-Justine University Hospital Center, 3175 Chemin de la Côte-Sainte-Catherine, Montréal, QC, H3T 1C5, Canada
| | | | - Julie Joncas
- Research Center, Sainte-Justine University Hospital Center, 3175 Chemin de la Côte-Sainte-Catherine, Montréal, QC, H3T 1C5, Canada
| | - Stefan Parent
- Université de Montréal, Montréal, Canada
- Research Center, Sainte-Justine University Hospital Center, 3175 Chemin de la Côte-Sainte-Catherine, Montréal, QC, H3T 1C5, Canada
| | - Hubert Labelle
- Université de Montréal, Montréal, Canada
- Research Center, Sainte-Justine University Hospital Center, 3175 Chemin de la Côte-Sainte-Catherine, Montréal, QC, H3T 1C5, Canada
| | - Soraya Barchi
- Research Center, Sainte-Justine University Hospital Center, 3175 Chemin de la Côte-Sainte-Catherine, Montréal, QC, H3T 1C5, Canada
| | - Jean-Marc Mac-Thiong
- Université de Montréal, Montréal, Canada.
- Research Center, Sainte-Justine University Hospital Center, 3175 Chemin de la Côte-Sainte-Catherine, Montréal, QC, H3T 1C5, Canada.
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Cheung PWH, Wong JSH, Luk KDK, Cheung JPY. Using the Proximal Femur Maturity Index at Brace Initiation for Adolescent Idiopathic Scoliosis Predicts Curve Progression Risk. J Bone Joint Surg Am 2024; 106:531-541. [PMID: 38261654 PMCID: PMC10939470 DOI: 10.2106/jbjs.23.00694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
BACKGROUND The Proximal Femur Maturity Index (PFMI) can be used to assess skeletal maturity on existing whole-spine radiographs without additional radiation. However, the relationship between the PFMI at the initiation of bracing for adolescent idiopathic scoliosis (AIS) and subsequent curve progression remains unknown. This study aimed to investigate the relationship between the PFMI and curve progression, and the predictability of risks to adulthood curve progression and surgical thresholds based on the PFMI grade at brace initiation. METHODS This was a prospective study of 202 patients with AIS who were prescribed underarm bracing according to the Scoliosis Research Society criteria and had good brace-wear compliance. The patients were followed from brace initiation until complete skeletal maturity. Longitudinal data on the coronal Cobb angle and skeletal maturity assessments using Risser staging, Sanders staging, the distal radius and ulna classification, and the PFMI were collected. Each patient was assessed on whether the major curve progressed to ≥40° (adulthood deterioration) and ≥50° (the surgical threshold). Logistic regressions were used to predict probabilities of curve progression to the 2 thresholds, adjusted for factors that were significant in univariate analyses. RESULTS The PFMI correlated with the other skeletal maturity indices (r s [Spearman rank correlation] = 0.60 to 0.72, p < 0.001 for all). The pre-brace PFMI grade correlated with progression to ≥40° (r rb [rank-biserial correlation] = -0.30, p < 0.001) and to ≥50° (r rb = -0.20, p = 0.005). Based on regression models (p < 0.001) adjusted for the pre-brace major Cobb angle and curve type, brace initiation at PFMI grades 2 and 3 for a curve of ≥30° had predicted risks of 30% (95% confidence interval [CI], 4% to 55%) and 12% (95% CI, 7% to 17%), respectively, for progression to the surgical threshold. Brace initiation at PFMI grade 5 had 0% progression risk. CONCLUSIONS The PFMI can be used for predicting curve progression and prognosticating brace outcomes in AIS. Patients with brace initiation at PFMI grade 4 for a curve of <30° or at grade 5 were unlikely to progress to the adulthood deterioration or surgical threshold. In comparison, skeletally immature patients initiating bracing at a PFMI grade of ≤3 for a major curve of ≥30° had a higher risk of progression despite compliant brace wear. LEVEL OF EVIDENCE Prognostic Level II . See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Prudence Wing Hang Cheung
- Department of Orthopaedics and Traumatology, University of Hong Kong, Pokfulam, Hong Kong SAR, People’s Republic of China
| | - Janus Siu Him Wong
- Department of Orthopaedics and Traumatology, University of Hong Kong, Pokfulam, Hong Kong SAR, People’s Republic of China
| | - Keith Dip Kei Luk
- Department of Orthopaedics and Traumatology, University of Hong Kong, Pokfulam, Hong Kong SAR, People’s Republic of China
| | - Jason Pui Yin Cheung
- Department of Orthopaedics and Traumatology, University of Hong Kong, Pokfulam, Hong Kong SAR, People’s Republic of China
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Boyapati N, Trivedi A. Gastric Outlet Obstruction Secondary to Severe Thoracolumbar Scoliosis. Cureus 2024; 16:e51753. [PMID: 38187033 PMCID: PMC10771233 DOI: 10.7759/cureus.51753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/06/2024] [Indexed: 01/09/2024] Open
Abstract
A 78-year-old woman with a history of idiopathic thoracolumbar scoliosis presented with signs, symptoms, and imaging findings consistent with a gastric outlet obstruction secondary to the rib cage impinging on the pylorus of the stomach. She underwent an operative intervention and intra-operative findings were consistent with severe scoliosis with the right rib cage impinging on the pylorus, causing gastric outlet obstruction. A laparoscopic procedure was performed to pexy the greater curvature of the stomach to the left upper quadrant and a percutaneous endoscopic trans-gastric jejunostomy was inserted at the end. Thoracolumbar idiopathic scoliosis is a relatively benign common condition. However, with the increasing aging population and resultant higher incidence of progression to degenerative scoliosis, more patients are presenting with severe spinal and rib cage deformities that can cause rare intra-abdominal sequelae. We report the first case of a gastric outlet obstruction caused by the rib cage impinging on the pylorus in a patient with severe thoracolumbar scoliosis.
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Affiliation(s)
| | - Anand Trivedi
- Acute Surgical Unit, Fiona Stanley Hospital, Perth, AUS
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Chu K, Kuang X, Cheung PWH, Li S, Zhang T, Cheung JPY. Predicting Progression in Adolescent Idiopathic Scoliosis at the First Visit by Integrating 2D Imaging and 1D Clinical Information. Global Spine J 2023:21925682231211273. [PMID: 37903546 DOI: 10.1177/21925682231211273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/01/2023] Open
Abstract
STUDY DESIGN Retrospective observational study. OBJECTIVES The prediction of curve progression in patients with adolescent idiopathic scoliosis (AIS) remains an unresolved area in orthopedic surgery. To make a rapid meaningful prediction, easily accessible multi-dimensional data at the patient's first consultation should be used. Current studies use clinical growth parameters and numerical values extracted from radiographs to compile a predictive model, leaving out the radiographs themselves. Such practice inevitably wastes a lot of information. Thus, this study aims to create a neural network that can predict AIS progression among patients with curves indicated for bracing by integrating both one-dimensional (1D) clinical and two-dimensional (2D) radiological data collected at the patient's first visit in a fully automated manner. METHODS 513 idiopathic scoliosis patients indicated for and managed with bracing orthosis were recruited. After exclusion, 463 patients were included in deep learning analysis. Processed first-visit growth parameters and posteroanterior radiographs are used as training inputs and the curve progression outcomes obtained in follow ups are used as binary training outputs. The CapsuleNet architecture was modified and trained accordingly to make a prediction. RESULTS The final model achieved 90% sensitivity with an overall accuracy of 73.9% in the prediction of AIS in-brace curve progression by using first-visit multi-dimensional data, outperforming conventional convolutional neural networks. CONCLUSIONS This first-ever multidimensional-input model shows promise in serving as a screening tool for AIS in-brace curve progression. The incorporation of such a model into routine AIS diagnostic pipeline can assist orthopedics clinicians in personalizing the most appropriate management for each patient.
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Affiliation(s)
- Kenneth Chu
- Digital Health Laboratory, Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
| | - Xihe Kuang
- Digital Health Laboratory, Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
- Conova Medical Technology Limited, Hong Kong SAR, China
| | - Prudence W H Cheung
- Digital Health Laboratory, Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
| | - Sofia Li
- Digital Health Laboratory, Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
| | - Teng Zhang
- Digital Health Laboratory, Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
- Conova Medical Technology Limited, Hong Kong SAR, China
| | - Jason Pui Yin Cheung
- Digital Health Laboratory, Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
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Cheung PWH, Cheung JPY. Can the proximal humeral ossification system (PHOS) effectively guide brace weaning in patients with adolescent idiopathic scoliosis? EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2023; 32:2185-2195. [PMID: 37100964 DOI: 10.1007/s00586-023-07693-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 03/10/2023] [Accepted: 03/28/2023] [Indexed: 04/28/2023]
Abstract
PURPOSE The proximal humeral epiphyses can be conveniently viewed in routine spine radiographs. This study aimed to investigate whether the proximal humeral epiphyseal ossification system (PHOS) can be used to determine the timing of brace weaning in adolescent idiopathic scoliosis (AIS), as assessed by the rate of curve progression after brace weaning. METHODS A total of 107 patients with AIS who had weaned brace-wear at Risser Stage ≥ 4, no bodily growth and post-menarche ≥ 2 years between 7/2014 and 2/2016 were studied. Increase in major curve Cobb angle > 5° between weaning and 2-year follow-up was considered curve progression. Skeletal maturity was assessed using the PHOS, distal radius and ulna (DRU) classification, Risser and Sanders staging. Curve progression rate per maturity grading at weaning was examined. RESULTS After brace-wear weaning, 12.1% of the patients experienced curve progression. Curve progression rate for weaning at PHOS Stage 5 was 0% for curves < 40°, and 20.0% for curves ≥ 40°. No curve progression occurred when weaning at PHOS Stage 5 with radius grade of 10 for curves ≥ 40°. Factors associated with curve progression were: Months post-menarche (p = 0.021), weaning Cobb angle (p = 0.002), curves < 40° versus ≥ 40° (p = 0.009), radius (p = 0.006) and ulna (p = 0.025) grades, and Sanders stages (p = 0.025), but not PHOS stages (p = 0.454). CONCLUSION PHOS can be a useful maturity indicator for brace-wear weaning in AIS, with PHOS Stage 5 having no post-weaning curve progression in curves < 40°. For large curves ≥ 40°, PHOS Stage 5 is also effective in indicating the timing of weaning together with radius grade ≥ 10.
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Affiliation(s)
- Prudence Wing Hang Cheung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Professorial Block, 5thFloor, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China
| | - Jason Pui Yin Cheung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Professorial Block, 5thFloor, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China.
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Yahara Y, Tamura M, Seki S, Kondo Y, Makino H, Watanabe K, Kamei K, Futakawa H, Kawaguchi Y. A deep convolutional neural network to predict the curve progression of adolescent idiopathic scoliosis: a pilot study. BMC Musculoskelet Disord 2022; 23:610. [PMID: 35751051 PMCID: PMC9229131 DOI: 10.1186/s12891-022-05565-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 06/17/2022] [Indexed: 11/17/2022] Open
Abstract
Background Adolescent idiopathic scoliosis (AIS) is a three-dimensional spinal deformity that predominantly occurs in girls. While skeletal growth and maturation influence the development of AIS, accurate prediction of curve progression remains difficult because the prognosis for deformity differs among individuals. The purpose of this study is to develop a new diagnostic platform using a deep convolutional neural network (DCNN) that can predict the risk of scoliosis progression in patients with AIS. Methods Fifty-eight patients with AIS (49 females and 9 males; mean age: 12.5 ± 1.4 years) and a Cobb angle between 10 and 25 degrees (mean angle: 18.7 ± 4.5) were divided into two groups: those whose Cobb angle increased by more than 10 degrees within two years (progression group, 28 patients) and those whose Cobb angle changed by less than 5 degrees (non-progression group, 30 patients). The X-ray images of three regions of interest (ROIs) (lung [ROI1], abdomen [ROI2], and total spine [ROI3]), were used as the source data for learning and prediction. Five spine surgeons also predicted the progression of scoliosis by reading the X-rays in a blinded manner. Results The prediction performance of the DCNN for AIS curve progression showed an accuracy of 69% and an area under the receiver-operating characteristic curve of 0.70 using ROI3 images, whereas the diagnostic performance of the spine surgeons showed inferior at 47%. Transfer learning with a pretrained DCNN contributed to improved prediction accuracy. Conclusion Our developed method to predict the risk of scoliosis progression in AIS by using a DCNN could be a valuable tool in decision-making for therapeutic interventions for AIS.
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Affiliation(s)
- Yasuhito Yahara
- Department of Orthopaedic Surgery, Faculty of Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan. .,Department of Molecular and Medical Pharmacology, Faculty of Medicine, University of Toyama, Toyama, Japan.
| | - Manami Tamura
- Department of Radiological Technology, Graduate School of Health Sciences, Niigata University, 2-746 Asahimachi-dori, Chuo-ku, Niigata, 951-8518, Japan
| | - Shoji Seki
- Department of Orthopaedic Surgery, Faculty of Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Yohan Kondo
- Department of Radiological Technology, Graduate School of Health Sciences, Niigata University, 2-746 Asahimachi-dori, Chuo-ku, Niigata, 951-8518, Japan.
| | - Hiroto Makino
- Department of Orthopaedic Surgery, Faculty of Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Kenta Watanabe
- Department of Orthopaedic Surgery, Faculty of Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Katsuhiko Kamei
- Department of Orthopaedic Surgery, Faculty of Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Hayato Futakawa
- Department of Orthopaedic Surgery, Faculty of Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Yoshiharu Kawaguchi
- Department of Orthopaedic Surgery, Faculty of Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
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Wang W, Chen T, Liu Y, Wang S, Yang N, Luo M. Predictive value of single-nucleotide polymorphisms in curve progression of adolescent idiopathic scoliosis. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2022; 31:2311-2325. [PMID: 35434775 DOI: 10.1007/s00586-022-07213-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 03/24/2022] [Accepted: 04/06/2022] [Indexed: 12/18/2022]
Abstract
PURPOSE Genetic diagnosis is a promising approach because several single-nucleotide polymorphisms (SNPs) associated with adolescent idiopathic scoliosis (AIS) progression have been reported. We review the predictive value of SNPs in curve progression of adolescent idiopathic scoliosis. METHODS We reviewed DNA-based prognostic testing to predict curve progression. Then, the multiple polymorphisms in loci related to AIS progression were also reviewed, and we elucidated the predictive value of SNPs from four functional perspectives, including endocrine metabolism, neuromuscular system, cartilage and extracellular matrix, enzymes, and cytokines. RESULTS The ScoliScores were less successful predictors than expected, and the weak power of predictive SNPs might account for its failure. Susceptibility loci in ESR1, ESR2, GPER, and IGF1, which related to endocrine metabolism, have been reported to predict AIS progression. Neuromuscular imbalance might be a potential mechanism of scoliosis, and SNPs in LBX1, NTF3, and SOCS3 have been reported to predict the curve progression of AIS. Susceptibility loci in SOX9, MATN1, AJAP1, MMP9, and TIMP2, which are related to cartilage and extracellular matrix, are also potentially related to AIS progression. Enzymes and cytokines play essential roles in regulating bone metabolism and embryonic development. SNPs in BNC2, SLC39A8, TGFB1, IL-6, IL-17RC, and CHD7 were suggested as predictive loci for AIS curve progression. CONCLUSIONS Many promising SNPs have been identified to predict the curve progression of AIS. However, conflicting results from replication studies and different ethnic groups hamper their reliability. Convincing SNPs from multiethnic populations and functional verification are needed.
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Affiliation(s)
- Wengang Wang
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, Henan, People's Republic of China
| | - Tailong Chen
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, Henan, People's Republic of China
| | - Yibin Liu
- Department of Emergency, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, Henan, People's Republic of China
| | - Songsong Wang
- Department of Emergency, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, Henan, People's Republic of China
| | - Ningning Yang
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, Henan, People's Republic of China. .,Department of Emergency, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, Henan, People's Republic of China.
| | - Ming Luo
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, 430071, Hubei, People's Republic of China.
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Cheung PWH, Canavese F, Chan CYW, Wong JSH, Shigematsu H, Luk KDK, Cheung JPY. The Utility of a Novel Proximal Femur Maturity Index for Staging Skeletal Growth in Patients with Idiopathic Scoliosis. J Bone Joint Surg Am 2022; 104:630-640. [PMID: 35006096 DOI: 10.2106/jbjs.21.00747] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND For growing patients, it is ideal to have a growth plate visible in routine radiographs for skeletal maturity assessment without additional radiation. The proximal femoral epiphyseal ossification is in proximity to the spine; however, whether it can be used for assessing a patient's growth status remains unknown. METHODS Two hundred and twenty sets of radiographs of the spine and the left hand and wrist of patients with idiopathic scoliosis were assessed for skeletal maturity and reliability testing. Risser staging, Sanders staging (SS), distal radius and ulna (DRU) classification, the proximal humeral ossification system (PHOS), and the novel proximal femur maturity index (PFMI) were used. The PFMI was newly developed on the basis of the radiographic appearances of the femoral head, greater trochanter, and triradiate cartilage. It consists of 7 grades (0 to 6) associated with increasing skeletal maturity. The PFMI was evaluated through its relationship with pubertal growth (i.e., the rate of changes of standing and sitting body height [BH] and arm span [AS]) and with established skeletal maturity indices. Longitudinal growth data and 780 corresponding spine radiographs were assessed to detect peak growth using receiver operating characteristic (ROC) curve analysis. RESULTS The PFMI was found to be correlated with chronological age (τ b = 0.522), growth rates based on standing BH (τ b = -0.303), and AS (τ b = -0.266) (p < 0.001 for all). The largest growth rate occurred at PFMI grade 3, with mean standing BH growth rates (and standard deviations) of 0.79 ± 0.44 cm/month for girls and 1.06 ± 0.67 cm/mo for boys. Growth rates of 0.12 ± 0.23 cm/mo (girls) and 0 ± 0 cm/mo (boys) occurred at PFMI grade 6, indicating growth cessation. Strong correlations were found between PFMI gradings and Risser staging (τ b = 0.743 and 0.774 for girls and boys), Sanders staging (τ b = 0.722 and 0.736, respectively), and radius (τ b = 0.792 and 0.820) and ulnar gradings (τ b = 0.777 and 0.821), and moderate correlations were found with PHOS stages (τ b = 0.613 and 0.675) (p < 0.001 for all). PFMI gradings corresponded to as young as SS1, R4, U1, and PHOS stage 1. Fair to excellent interrater and intrarater reliabilities were observed. PFMI grade 3 was most prevalent and predictive for peak growth based on ROC results. CONCLUSIONS The PFMI demonstrated clear pubertal growth phases with satisfactory reliability. Grade 3 indicates peak growth and grade 6 indicates growth cessation. CLINICAL RELEVANCE The use of PFMI can benefit patients by avoiding additional radiation in skeletal maturity assessment and can impact current clinical protocol of patient visits. PFMI gradings had strong correlations with SS, DRU gradings, and Risser staging, and they cross-referenced to their established grades at peak growth and growth cessation. PFMI may aid in clinical decision making.
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Affiliation(s)
| | - Federico Canavese
- Pediatric Orthopedic Surgery Department, Lille University Hospital, Faculty of Medicine Henri Warembourg, University of Lille, Loos, France
| | - Chris Yin Wei Chan
- Spine Research Unit, Department of Orthopaedic Surgery (NOCERAL), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Janus Siu Him Wong
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong SAR
| | - Hideki Shigematsu
- Department of Orthopaedic Surgery, Nara Medical University, Nara, Japan
| | - Keith Dip Kei Luk
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong SAR
| | - Jason Pui Yin Cheung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong SAR
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Abstract
Aims The aim of this study was to assess the ability of morphological spinal parameters to predict the outcome of bracing in patients with adolescent idiopathic scoliosis (AIS) and to establish a novel supine correction index (SCI) for guiding bracing treatment. Methods Patients with AIS to be treated by bracing were prospectively recruited between December 2016 and 2018, and were followed until brace removal. In all, 207 patients with a mean age at recruitment of 12.8 years (SD 1.2) were enrolled. Cobb angles, supine flexibility, and the rate of in-brace correction were measured and used to predict curve progression at the end of follow-up. The SCI was defined as the ratio between correction rate and flexibility. Receiver operating characteristic (ROC) curve analysis was carried out to assess the optimal thresholds for flexibility, correction rate, and SCI in predicting a higher risk of progression, defined by a change in Cobb angle of ≥ 5° or the need for surgery. Results The baseline Cobb angles were similar (p = 0.374) in patients whose curves progressed (32.7° (SD 10.7)) and in those whose curves remained stable (31.4° (SD 6.1)). High supine flexibility (odds ratio (OR) 0.947 (95% CI 0.910 to 0.984); p = 0.006) and correction rate (OR 0.926 (95% CI 0.890 to 0.964); p < 0.001) predicted a lower incidence of progression after adjusting for Cobb angle, Risser sign, curve type, menarche status, distal radius and ulna grading, and brace compliance. ROC curve analysis identified a cut-off of 18.1% for flexibility (sensitivity 0.682, specificity 0.704) and a cut-off of 28.8% for correction rate (sensitivity 0.773, specificity 0.691) in predicting a lower risk of curve progression. A SCI of greater than 1.21 predicted a lower risk of progression (OR 0.4 (95% CI 0.251 to 0.955); sensitivity 0.583, specificity 0.591; p = 0.036). Conclusion A higher supine flexibility (18.1%) and correction rate (28.8%), and a SCI of greater than 1.21 predicted a lower risk of progression. These novel parameters can be used as a guide to optimize the outcome of bracing. Cite this article: Bone Joint J 2022;104-B(4):495–503.
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Affiliation(s)
- Lester P K Wong
- Department of Orthopaedics and Traumatology, University of Hong Kong, Hong Kong, China
| | - Prudence W H Cheung
- Department of Orthopaedics and Traumatology, University of Hong Kong, Hong Kong, China
| | - Jason P Y Cheung
- Department of Orthopaedics and Traumatology, University of Hong Kong, Hong Kong, China
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Wong LPK, Cheung PWH, Cheung JPY. Curve type, flexibility, correction, and rotation are predictors of curve progression in patients with adolescent idiopathic scoliosis undergoing conservative treatment : a systematic review. Bone Joint J 2022; 104-B:424-432. [PMID: 35360948 PMCID: PMC9020521 DOI: 10.1302/0301-620x.104b4.bjj-2021-1677.r1] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
AIMS The aim of this study was to review the current evidence surrounding curve type and morphology on curve progression risk in adolescent idiopathic scoliosis (AIS). METHODS A comprehensive search was conducted by two independent reviewers on PubMed, Embase, Medline, and Web of Science to obtain all published information on morphological predictors of AIS progression. Search items included 'adolescent idiopathic scoliosis', 'progression', and 'imaging'. The inclusion and exclusion criteria were carefully defined. Risk of bias of studies was assessed with the Quality in Prognostic Studies tool, and level of evidence for each predictor was rated with the Grading of Recommendations, Assessment, Development and Evaluations (GRADE) approach. In all, 6,286 publications were identified with 3,598 being subjected to secondary scrutiny. Ultimately, 26 publications (25 datasets) were included in this review. RESULTS For unbraced patients, high and moderate evidence was found for Cobb angle and curve type as predictors, respectively. Initial Cobb angle > 25° and thoracic curves were predictive of curve progression. For braced patients, flexibility < 28% and limited in-brace correction were factors predictive of progression with high and moderate evidence, respectively. Thoracic curves, high apical vertebral rotation, large rib vertebra angle difference, small rib vertebra angle on the convex side, and low pelvic tilt had weak evidence as predictors of curve progression. CONCLUSION For curve progression, strong and consistent evidence is found for Cobb angle, curve type, flexibility, and correction rate. Cobb angle > 25° and flexibility < 28% are found to be important thresholds to guide clinical prognostication. Despite the low evidence, apical vertebral rotation, rib morphology, and pelvic tilt may be promising factors. Cite this article: Bone Joint J 2022;104-B(4):424-432.
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Affiliation(s)
- Lester P K Wong
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
| | - Prudence W H Cheung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
| | - Jason P Y Cheung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
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Yang JH, Chang DG, Suh SW. Diagnosis and conservative treatment of adolescent idiopathic scoliosis. JOURNAL OF THE KOREAN MEDICAL ASSOCIATION 2021. [DOI: 10.5124/jkma.2021.64.11.734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Background: Adolescent idiopathic scoliosis (AIS) has a diagnosis rate of 3% to 5% per year, but the number of cases requiring surgical treatments is very small, accounting for only 0.17% to 1.75% of all AIS patients. Most patients with AIS are diagnosed, treated, and managed in outpatient clinics.Current Concepts: AIS is a disease that occurs more frequently, and progresses faster, in females than in males. Scoliosis deformity can occur due to various causes. To differentially diagnose AIS, it is necessary to perform careful physical examinations, investigate family history, and check for neurological, growth, and developmental abnormalities. Definitive diagnosis of AIS can be performed through radiographic imaging. In the case of atypical curvature and symptoms, examinations such as magnetic resonance imaging could be required in addition to radiographic imaging. Treatment of AIS patients in outpatient clinics can be performed through observation, exercise, and orthosis. The selection and application of treatment methods and the termination period of the treatments are complexly affected by the age at the time of diagnosis; pattern, location and size of the curve; and growth potential.Discussion and Conclusion: AIS is a disease in which good results can be obtained with conservative treatments such as exercise and orthosis, which is generally applied in an outpatient setting. To properly treat AIS, it is necessary to have an in-depth understanding of the characteristics of AIS, timing of treatment, and factors influencing treatment.
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12
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Cheung PWH, Canavese F, Luk KDK, Cheung JPY. An insight of how multiple skeletal maturity indices can be used for growth assessment: relationship between the simplified olecranon, simplified digital, and distal radius and ulna classifications. J Pediatr Orthop B 2021; 30:371-380. [PMID: 32649422 PMCID: PMC8154180 DOI: 10.1097/bpb.0000000000000760] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
This cross-sectional study aims to investigate the relationship between the simplified olecranon, simplified digital, and distal radius and ulna (DRU) classifications, and whether they can aid in more comprehensive maturity assessment together. Left hand and wrist and lateral elbow radiographs from pediatric patients were assessed using the three skeletal maturity indices. The association between maturity indices was investigated using Goodman and Kruskal's gamma, and by mapping of individual grades based on chronological age. Specific maturity grades, at which peak height velocity (PHV) occurs as previously identified, were based upon to explore how the three systems interact. A total of 114 patients (63.2% girls) were studied. Correlations and associations between the three maturity parameters were significant (all at P < 0.001). Mapping revealed uneven spans and coverage of different periods by each index. Olecranon stage 1 coincided with R3 (for girls), R4 (for boys), U3, and SS1. Olecranon stage 5 occurred as early as R7, U6, and SS4. Upon elbow fusion, the simplified digital (SS5-SS8) and DRU (R8-R11 and U7-U9) classifications can be used for assessment until maturity. The inter-relationship of the simplified hand, wrist, and olecranon methods indicates their combined use. DRU grades can be used in growth periods which are less well covered. Prepubertal and growth acceleration phase of pubertal growth spurt can best be assessed by both the simplified olecranon (stages 1-3) and DRU classifications (R1-R5 and U1-U4). All three indices are required during PHV. For post-PHV, DRU (R8-R11 and U7-U9) and simplified digital method (SS5-SS8) complement each other for assessment until skeletal maturity.
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Affiliation(s)
- Prudence Wing Hang Cheung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Federico Canavese
- Department of Pediatric Surgery, University Hospital Estaing, Clermont-Ferrand, France
| | - Keith Dip Kei Luk
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Jason Pui Yin Cheung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
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Lenz M, Oikonomidis S, Harland A, Fürnstahl P, Farshad M, Bredow J, Eysel P, Scheyerer MJ. Scoliosis and Prognosis-a systematic review regarding patient-specific and radiological predictive factors for curve progression. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2021; 30:1813-1822. [PMID: 33772381 DOI: 10.1007/s00586-021-06817-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 01/13/2021] [Accepted: 03/12/2021] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Idiopathic scoliosis, defined as a > 10° curvature of the spine in the frontal plane, is one of the most common spinal deformities. Age, initial curve magnitude and other parameters define whether a scoliotic deformity will progress or not. Still, their interactions and amounts of individual contribution are not fully elaborated and were the aim of this systematic review. METHODS A systematic literature search was conducted in the common databases using MESH terms, searching for predictive factors of curve progression in adolescent idiopathic scoliosis ("adolescent idiopathic scoliosis" OR "ais" OR "idiopathic scoliosis") AND ("predictive factors" OR "progression" OR "curve progression" OR "prediction" OR "prognosis"). The identified and analysed factors of each study were rated to design a top five scale of the most relevant factors. RESULTS Twenty-eight investigations with 8255 patients were identified by literature search. Patient-specific risk factors for curve progression from initial curve were age (at diagnosis < 13 years), family history, bone mineral status (< 110 mg/cm3 in quantitative CT) and height velocity (7-8 cm/year, peak 11.6 ± 1.4 years). Relevant radiological criteria indicating curve progression included skeletal maturity, marked by Risser stages (Risser < 1) or Sanders Maturity Scale (SMS < 5), the initial extent of the Cobb angle (> 25° progression) and curve location (thoracic single or double curve). DISCUSSION This systematic review summarised the current state of knowledge as the basis for creation of patient-specific algorithms regarding a risk calculation for a progressive scoliotic deformity. Curve magnitude is the most relevant predictive factor, followed by status of skeletal maturity and curve location.
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Affiliation(s)
- Maximilian Lenz
- Department for Orthopaedic and Trauma Surgery, Faculty of Medicine, University Hospital of Cologne, Kerpener Str. 62, Joseph-Stelzmann Strasse 24, 50931, Cologne, Germany.
| | - Stavros Oikonomidis
- Department for Orthopaedic and Trauma Surgery, Faculty of Medicine, University Hospital of Cologne, Kerpener Str. 62, Joseph-Stelzmann Strasse 24, 50931, Cologne, Germany
| | - Arne Harland
- Department for Orthopaedic and Trauma Surgery, Faculty of Medicine, University Hospital of Cologne, Kerpener Str. 62, Joseph-Stelzmann Strasse 24, 50931, Cologne, Germany
| | - Philipp Fürnstahl
- Department of Orthopaedic Surgery, Balgrist University Hospital, University of Zürich, Forchstrasse 340, Zurich, Switzerland
| | - Mazda Farshad
- Department of Orthopaedic Surgery, Balgrist University Hospital, University of Zürich, Forchstrasse 340, Zurich, Switzerland
| | - Jan Bredow
- Department for Orthopaedic and Trauma Surgery, Faculty of Medicine, University Hospital of Cologne, Kerpener Str. 62, Joseph-Stelzmann Strasse 24, 50931, Cologne, Germany
| | - Peer Eysel
- Department for Orthopaedic and Trauma Surgery, Faculty of Medicine, University Hospital of Cologne, Kerpener Str. 62, Joseph-Stelzmann Strasse 24, 50931, Cologne, Germany
| | - Max Joseph Scheyerer
- Department for Orthopaedic and Trauma Surgery, Faculty of Medicine, University Hospital of Cologne, Kerpener Str. 62, Joseph-Stelzmann Strasse 24, 50931, Cologne, Germany
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Park SJ, Lee KH, Lee CS, Kim KT, Jang JH, Shin DH, Kim MS, Kim J, Cho SY, Jin DK. Impact of growth hormone treatment on scoliosis development and progression: analysis of 1128 patients with idiopathic short stature. J Pediatr Endocrinol Metab 2021; 34:243-250. [PMID: 33180047 DOI: 10.1515/jpem-2020-0393] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 10/19/2020] [Indexed: 02/07/2023]
Abstract
OBJECTIVES The purpose of this study was to evaluate the impact of recombinant human growth hormone (rhGH) on the development and progression of scoliosis in patients with idiopathic short stature (ISS). METHODS Patients with ISS who underwent rhGH treatment from 1997 to 2017 and were followed up for scoliosis screening with serial radiographic examination were included. For assessing scoliosis development, patients who did not have scoliosis at the time of rhGH treatment were included and followed up to determine whether de novo scoliosis developed during the treatment. For evaluating scoliosis progression, patients who already had scoliosis were analyzed. Univariate and multivariate Cox regression analyses of demographic and radiographic variables were performed to determine the related factors in the development and progression of scoliosis. RESULTS For assessing scoliosis development, 1093 patients were included. The average duration of rhGH treatment was about 2 years. De novo scoliosis developed in 32 patients (3.7%). The analysis revealed that sex (p=0.016) and chronological age (p=0.048) were statistically significant factors associated with scoliosis development. However, no relationship was observed between scoliosis development and rhGH treatment types or duration. Among 67 patients who already had scoliosis at the time of rhGH treatment, 11 (16.4%) showed scoliosis progression. However, the rhGH types and duration also did not affect scoliosis progression. CONCLUSIONS De novo scoliosis developed in 3.7% and scoliosis progressed in 16.4% of the patients during rhGH treatment. However, scoliosis development or progression was not affected by the types or duration of rhGH treatment in patients with ISS.
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Affiliation(s)
- Se-Jun Park
- Department of Orthopedic Surgery, Spine Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Keun-Ho Lee
- Department of Orthopedic Surgery, College of Medicine, Hallym University, Kangdong Sacred Heart Hospital, Seoul, Republic of Korea
| | - Chong-Suh Lee
- Department of Orthopedic Surgery, Spine Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Ki-Tack Kim
- Department of Orthopedic Surgery, College of Medicine, Kyung Hee University Hospital at Gangdong, Kyung Hee University, Seoul, Republic of Korea
| | - Jun Hyuk Jang
- Department of Orthopedic Surgery, College of Medicine, Hallym University, Kangdong Sacred Heart Hospital, Seoul, Republic of Korea
| | - Dae Hun Shin
- Department of Orthopedic Surgery, College of Medicine, Hallym University, Kangdong Sacred Heart Hospital, Seoul, Republic of Korea
| | - Min Sun Kim
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Jiyeon Kim
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Sung Yoon Cho
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Dong-Kyu Jin
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Cheung JPY, Cheung PWH, Shigematsu H, Takahashi S, Kwan MK, Chan CYW, Chiu CK, Sakai D. Controversies with nonoperative management for adolescent idiopathic scoliosis: Study from the APSS Scoliosis Focus Group. J Orthop Surg (Hong Kong) 2021; 28:2309499020930291. [PMID: 32529908 DOI: 10.1177/2309499020930291] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
PURPOSE To determine consensus among Asia-Pacific surgeons regarding nonoperative management for adolescent idiopathic scoliosis (AIS). METHODS An online REDCap questionnaire was circulated to surgeons in the Asia-Pacific region during the period of July 2019 to September 2019 to inquire about various components of nonoperative treatment for AIS. Aspects under study included access to screening, when MRIs were obtained, quality-of-life assessments used, role of scoliosis-specific exercises, bracing criteria, type of brace used, maturity parameters used, brace wear regimen, follow-up criteria, and how braces were weaned. Comparisons were made between middle-high income and low-income countries, and experience with nonoperative treatment. RESULTS A total of 103 responses were collected. About half (52.4%) of the responders had scoliosis screening programs and were particularly situated in middle-high income countries. Up to 34% obtained MRIs for all cases, while most would obtain MRIs for neurological problems. The brace criteria were highly variable and was usually based on menarche status (74.7%), age (59%), and Risser staging (92.8%). Up to 52.4% of surgeons elected to brace patients with large curves before offering surgery. Only 28% of responders utilized CAD-CAM techniques for brace fabrication and most (76.8%) still utilized negative molds. There were no standardized criteria for brace weaning. CONCLUSION There are highly variable practices related to nonoperative treatment for AIS and may be related to availability of resources in certain countries. Relative consensus was achieved for when MRI should be obtained and an acceptable brace compliance should be more than 16 hours a day.
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Affiliation(s)
- Jason Pui Yin Cheung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Prudence Wing Hang Cheung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Hideki Shigematsu
- Department of Orthopaedic Surgery, Nara Medical University, Nara, Japan
| | - Shinji Takahashi
- Department of Orthopaedic Surgery, Osaka City University, Osaka, Japan
| | - Mun Keong Kwan
- Department of Orthopaedic Surgery, University of Malaya, Kuala Lumpur, Malaysia
| | - Chris Yin Wei Chan
- Department of Orthopaedic Surgery, University of Malaya, Kuala Lumpur, Malaysia
| | - Chee Kidd Chiu
- Department of Orthopaedic Surgery, University of Malaya, Kuala Lumpur, Malaysia
| | - Daisuke Sakai
- Department of Orthopedic Surgery, Tokai University School of Medicine, Kanagawa, Japan
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Kwok SSS, Cheung JPY. Surgical decision-making for ossification of the posterior longitudinal ligament versus other types of degenerative cervical myelopathy: anterior versus posterior approaches. BMC Musculoskelet Disord 2020; 21:823. [PMID: 33292175 PMCID: PMC7724709 DOI: 10.1186/s12891-020-03830-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 11/25/2020] [Indexed: 12/02/2022] Open
Abstract
Background The debate between anterior or posterior approach for pathologies such as cervical spondylotic myelopathy (CSM) and ossification of the posterior longitudinal ligament (OPLL) have drawn heated debate but are still inconclusive. Main body of the abstract A narrative review was performed specifically to study the differences pertaining to OPLL and other causes of degenerative cervical myelopathy (DCM). Current evidence suggests that anterior approach is preferred for K-line (−) OPLL, K-line (+) with canal occupying ratio > 60% and DCM with pre-existing cervical kyphosis. Posterior approach is preferred for K-line (+) OPLL with canal-occupying ratio < 50–60%, and multi-level CSM. No particular advantage for either approach was observed for DCM in a lordotic cervical spine. Anterior approach is generally associated with more complications and thus needs to be weighed carefully during decision-making. The evidence is not convincing for comparing single versus multi-level involvement, and the role of patients' co-morbidity status, pre-existing osteoporosis and co-existent spinal pathologies in influencing patient outcome and surgical options. This should be a platform for future research directives. Conclusion From this review, evidence is still inconclusive but there are some factors to consider, and DCM and OPLL should be considered separately for decision-making. Anterior approach is considered for pre-existing cervical kyphosis in DCM, for K-line (−) regardless of canal-occupying ratio, and K-line (+) and canal-occupying ratio > 60% for OPLL patients. Posterior approach is considered for patients with multi-level pathology for DCM, and K-line (+) and canal-occupying ratio < 50–60% for OPLL.
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Affiliation(s)
- Suzanna Sum Sum Kwok
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Professorial Block, 5th Floor, 102 Pokfulam Road, Pokfulam, Hong Kong, SAR, China
| | - Jason Pui Yin Cheung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Professorial Block, 5th Floor, 102 Pokfulam Road, Pokfulam, Hong Kong, SAR, China.
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How do we follow-up patients with adolescent idiopathic scoliosis? Recommendations based on a multicenter study on the distal radius and ulna classification. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2020; 29:2064-2074. [PMID: 32377896 DOI: 10.1007/s00586-020-06441-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 04/18/2020] [Accepted: 04/27/2020] [Indexed: 01/31/2023]
Abstract
PURPOSE To determine the capability of the distal radius and ulna (DRU) classification for predicting the scoliosis progression risk within 1 year in patients with adolescent idiopathic scoliosis (AIS) and to develop simple recommendations for follow-up durations. METHODS Medical records of patients with AIS at two tertiary scoliosis referral centers were retrospectively reviewed for their DRU classification and major curve Cobb angles. Baseline DRU grades and Cobb angles with subsequent 1-year follow-up curve magnitudes were studied for scoliosis progression, which was defined as exacerbation of the Cobb angle by ≥ 6°. The relationship between DRU classification and scoliosis progression risk within 1 year was investigated. Patients were divided into three groups according to the Cobb angle (10°-19°, 20°-29°, ≥ 30°). RESULTS Of the 205 patients with 283 follow-up visits, scoliosis progression occurred in 86 patients (90 follow-up visits). Radius and ulna grades were significantly related to scoliosis progression (p < 0.001). R6, R7, and U5 grades were significantly related to scoliosis progression risk. The curve progression probability increased as the Cobb angle increased. Cobb angles ≥ 30°, with these grades, led to progression in > 80% of patients within 1 year. Curve progression was less likely for grades R9 and U7. Most patients with more mature DRU grades did not experience progression, even with Cobb angles ≥ 30°. CONCLUSION With R6, R7, and U5, scoliosis may progress within a short period; therefore, careful follow-up with short intervals within 6 months is necessary. R9 and U7 may allow longer 1-year follow-up intervals due to the lower progression risk.
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Cheung JPY, Cheung PWH, Yeng WC, Chan LCK. Does Curve Regression Occur During Underarm Bracing in Patients with Adolescent Idiopathic Scoliosis? Clin Orthop Relat Res 2020; 478:334-345. [PMID: 31688210 PMCID: PMC7438132 DOI: 10.1097/corr.0000000000000989] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 09/12/2019] [Indexed: 01/31/2023]
Abstract
BACKGROUND Successful brace treatment entails good control of scoliosis with avoidance of surgery. However, achieving curve regression may be an even better radiological result than prevention of curve progression for patients with adolescent idiopathic scoliosis. Vertebral remodeling may occur with well-fitted braces. Better in-brace curve correction may influence the likelihood of vertebral remodeling and the chance of curve regression. Only a few reports have evaluated curve regression with brace treatment, and the factors associated with these events are unknown. QUESTIONS/PURPOSES (1) What changes in curvature are observed with brace treatment for adolescent idiopathic scoliosis? (2) What factors are associated with curve improvement? (3) What factors are associated with curve deterioration? (4) Is curve regression associated with improvements in patient-reported objective outcome scores? METHODS Between September 2008 and December 2013, 666 patients with adolescent idiopathic scoliosis underwent underarm brace treatment and were followed until skeletal maturity at 18 years old. Among these patients, 80 were excluded because of early discontinuation of brace treatment (n = 66) and loss to follow-up (n = 14). Hence, 586 patients were included in this study, with a mean brace-wear duration of 3.8 ± 1.5 years and post-weaning follow-up duration of 2.0 ± 1.1 years. The mean age at baseline was 12.6 ± 1.2 years. Most patients were female (87%, 507 of 586) and up to 53% (267 of 507) of females were post-menarche. Bracing outcomes were based on changes in the Cobb angle measured out of brace. These included curve regression, as indicated by at least a 5° reduction in the Cobb angle, curve progression, as indicated by at least a 5° increase in the Cobb angle, and unchanged, as indicated by a change in the Cobb angle of less than 5°. We studied the pre-brace and supine Cobb angles, curve flexibility (pre-brace Cobb angle - supine Cobb angle / pre-brace Cobb angle x 100%), correction rate (pre-brace Cobb angle - in-brace Cobb angle / pre-brace Cobb angle x 100%), location of apical vertebrae, apical ratio (convex vertebral height/concave vertebral height), change in the major curve Cobb angle, and apical ratio post-bracing. The refined 22-item Scoliosis Research Society questionnaire was used for patient-reported outcomes and is composed of five domains (function, pain, appearance, mental health and satisfaction with treatment). Its minimum clinically important difference, based on a scale from 0 to 5, has been quoted as 0.2 for pain, 0.08 for activity and 0.98 for appearance domains. Mental health has no quoted minimum clinically important difference for the adolescent idiopathic scoliosis population. Satisfaction with treatment is described based on improvement or deterioration in domain scores. Intergroup differences between bracing outcomes were evaluated with the Kruskal Wallis test. Univariate analyses of bracing outcomes were performed with a point-biserial correlation coefficient for continuous variables and Pearson's chi-square test for categorical variables. Multivariate logistic regression models were created for improved and deteriorated outcomes. P values < 0.05 were considered significant. RESULTS In all, 17% of patients (98 of 586) had an improved angle and 40% of patients (234 of 586) had curve deterioration. In patients who improved, the mean reduction in the Cobb angle was 9 ± 4°, while in patients who deteriorated, the mean increase in the Cobb angle was 15 ± 9°, and this was maintained at the latest post-brace weaning follow-up. Despite a trend for patients with curve regression to have higher baseline flexibility and correction rate, after controlling for age, Risser staging, radius and ulnar grading, and Sanders staging, we found no clinically important differences with increased correction rate or flexibility. We did find that improvement in the Cobb angle after bracing was associated with reduced apical ratio (odds ratio [OR] 0.84 [95% CI 0.80 to 0.87]; p < 0.001). Curve progression was associated with younger age (OR 0.71 [95% CI 0.55 to 0.91]; p = 0.008), pre-menarche status (OR 2.46 [95% CI 1.31 to 4.62]; p = 0.005), and increased apical ratio (OR 1.24 [95% CI 1.19 to 1.30]; p < 0.001) but no clinically important differences were observed with less flexible curves and reduced correction rate. Improvements in scores of the refined 22-item Scoliosis Research Society domains of function (mean difference on a scale from 0 to 5: 0.2; p = 0.001 versus 0.1; p < 0.001) and pain (mean difference on a scale from 0 to 5: 0.2; p = 0.020 versus 0.0; p = 0.853) were greater in the post-brace improvement group than in the deterioration group and fulfilled the minimum clinically important difference threshold. The appearance domain did not fulfill the minimum clinically important difference. Satisfaction with treatment domain score minimally improved with the curve regression group (mean difference on a scale from 0 to 5: 0.2) but deteriorated in the curve progression group (mean difference on a scale from 0 to 5: -0.4). CONCLUSIONS Curve regression occurs after underarm bracing and is associated with superior patient-reported outcome scores. This possible change in Cobb angle should be explained to patients before and during bracing. Whether this may help improve patients' duration of brace-wear should be addressed in future studies. Patients with well-fitting braces may experience curve improvement and possible vertebral remodeling. Those braced at a younger age and with increased vertebral wedging are more likely to have curve progression. LEVEL OF EVIDENCE Level III, therapeutic study.
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Affiliation(s)
- Jason Pui Yin Cheung
- J. P. Y. Cheung, P. W. H. Cheung, Department of Orthopaedics and Traumatology, the University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Prudence Wing Hang Cheung
- J. P. Y. Cheung, P. W. H. Cheung, Department of Orthopaedics and Traumatology, the University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Wing Cheung Yeng
- W. C. Yeng, L. C. K. Chan, Prosthetic and Orthotic Department, the Duchess of Kent Children's Hospital, Hong Kong SAR, China
| | - Lawrence Chi Kwan Chan
- W. C. Yeng, L. C. K. Chan, Prosthetic and Orthotic Department, the Duchess of Kent Children's Hospital, Hong Kong SAR, China
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Okuda A, Shigematsu H, Fujii H, Iwata E, Tanaka M, Morimoto Y, Masuda K, Yamamoto Y, Tanaka Y. Reliability Comparison between "Distal Radius and Ulna" and "Simplified Tanner-Whitehouse III" Assessments for Patients with Adolescent Idiopathic Scoliosis. Asian Spine J 2020; 14:280-286. [PMID: 31992028 PMCID: PMC7280927 DOI: 10.31616/asj.2019.0162] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 09/19/2019] [Indexed: 11/23/2022] Open
Abstract
Study Design This is a retrospective clinical study. Purpose In this study, we aim to evaluate the reliability of the distal radius and ulna assessment (DRU) and simplified Tanner-Whitehouse III classification (sTW3) in Japanese patients with adolescent idiopathic scoliosis (AIS). Overview of Literature The greatest curvature of a scoliotic spine occurs at peak-height velocity (PHV), which is the time during which an individual’s height increases at the maximum rate. Diagnosing and appropriately treating AIS before PHV is the most effective way in order to prevent unnecessary deterioration of the scoliosis curve. Although it is difficult to detect scoliosis before PHV, DRU and sTW3, which involve evaluations using a left-hand radiograph, have been reported to be effective. Methods We retrospectively evaluated 54 hands of 40 girls with AIS who visited Nara Medical University Hospital from 2000 to 2015 using previously collected radiographs. The examiners included a spine surgeon and a pediatric orthopedic surgeon, each with over 10 years of experience. The reliability of the DRU and sTW3 was evaluated using the kappa coefficient. Results The left-hand radiographs of 40 female patients with AIS (mean age, 13.9±1.7 years; N=54 hands) were evaluated by two blinded examiners using the sTW3 and DRU methods. The highest inter-observer and intra-observer reliabilities (kappa, 0.64 and 0.62, respectively) for radius evaluation were determined. Radius evaluation by the DRU showed the highest agreement rate and smallest error between the inter- and intra-observer examinations. Conclusions The DRU was the most reliable assessment tool, and it has the potential to be useful for precisely determining the stage of skeletal maturity in outpatient clinics.
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Affiliation(s)
- Akinori Okuda
- Department of Orthopedic Surgery, Nara Medical University, Kashihara, Japan
| | - Hideki Shigematsu
- Department of Orthopedic Surgery, Nara Medical University, Kashihara, Japan
| | - Hiromasa Fujii
- Department of Orthopedic Surgery, Nara Medical University, Kashihara, Japan
| | - Eiichiro Iwata
- Department of Orthopedic Surgery, Nara Medical University, Kashihara, Japan
| | - Masato Tanaka
- Department of Orthopedic Surgery, Nara Medical University, Kashihara, Japan
| | - Yasuhiko Morimoto
- Department of Orthopedic Surgery, Nara Medical University, Kashihara, Japan
| | - Keisuke Masuda
- Department of Orthopedic Surgery, Nara Medical University, Kashihara, Japan
| | - Yusuke Yamamoto
- Department of Orthopedic Surgery, Nara Medical University, Kashihara, Japan
| | - Yasuhito Tanaka
- Department of Orthopedic Surgery, Nara Medical University, Kashihara, Japan
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Cheung JPY, Cheung PWH, Luk KDK. When Should We Wean Bracing for Adolescent Idiopathic Scoliosis? Clin Orthop Relat Res 2019; 477:2145-2157. [PMID: 31135558 PMCID: PMC7000074 DOI: 10.1097/corr.0000000000000781] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 04/02/2019] [Indexed: 01/31/2023]
Abstract
BACKGROUND Current brace weaning criteria for adolescents with idiopathic scoliosis (AIS) are not well defined. Risser Stage 4, ≥ 2 years since the onset of menarche, and no further increase in body height over 6 months are considered justifications for stopping bracing. However, despite adherence to such standards, curve progression still occurs in some patients, and so better criteria for brace discontinuation are needed. QUESTIONS/PURPOSES (1) Is no change in height measurements over 6 months and Risser Stage 4 sufficient for initiating brace weaning? (2) What is the association between larger curves (45°) at brace weaning and the progression risk? (3) Are a more advanced Risser stage, Sanders stage, or distal radius and ulna classification associated with a decreased risk of curve progression? (4) When should we wean patients with AIS off bracing to reduce the time for brace wear while limiting the risk of postweaning curve progression? METHODS All AIS patients who were weaned off their braces from June 2014 to March 2016 were prospectively recruited and followed up for at least 2 years after weaning. A total of 144 patients were recruited with mean followup of 36 ± 21 months. No patients were lost to followup. Patients were referred for brace weaning based on the following criteria: they were Risser Stage 4, did not grow in height in the past 6 months of followup, and were at least 2 years postmenarche. Skeletal maturity was assessed with Risser staging, Sanders staging, and the distal radius and ulna classification. Curve progression was determined as any > 5° increase in the Cobb angle between two measurements from any subsequent six monthly followup visits. All radiographic measurements were performed by spine surgeons independently as part of their routine consultations and without knowledge of this study. Statistical analyses included an intergroup comparison of patients with and without curve progression, binomial stepwise logistic regression analysis, odds ratios (ORs) with their 95% confidence intervals (CIs), and a risk-ratio calculation. A reasonable protective maturity stage would generate an OR < 1. RESULTS Among patients braced until they had no change in height for 6 months, were 2 years postmenarche for girls, and Risser Stage 4, 29% experienced curve progression after brace weaning. Large curves (≥ 45°) were associated with greater curve progression (OR, 5.0; 95% CI, 1.7-14.8; p = 0.002) as an independent risk factor. Patients weaned at Sanders Stage 7 (OR, 4.7; 95% CI, 2.1-10.7; p < 0.001), radius Grade 9 (OR, 3.9; 95% CI, 1.75-8.51; p = 0.001), and ulna Grade 7 (OR, 3.1; 95% CI, 1.27-7.38; p = 0.013) were more likely to experience curve progression. The earliest maturity indices with a reasonable protective association were Sanders Stage 8 (OR, 0.21; 95% CI, 0.09-0.48; p < 0.001), and radius Grade 10 (OR, 0.42; 95% CI, 0.19-0.97; p = 0.042) with ulna Grade 9 (no patients with curve progression). CONCLUSION Brace weaning indications using Risser staging are inadequate. Curve progression is expected in patients with large curves, irrespective of maturity status. Bone age measurement by either Sanders staging or the distal radius and ulna classification provides clearer guidelines for brace weaning, resulting in the least postweaning curve progression. Weaning in patients with Sanders Stage 8 and radius Grade 10/ulna Grade 9 provides the earliest and most protective timepoints for initiating brace weaning. LEVEL OF EVIDENCE Level II, prognostic study.
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Affiliation(s)
- Jason Pui Yin Cheung
- J. P. Y. Cheung, P. W. H. Cheung, K. D. K. Luk, Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
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An Insight Into the Health-Related Quality of Life of Adolescent Idiopathic Scoliosis Patients Who Are Braced, Observed, and Previously Braced. Spine (Phila Pa 1976) 2019; 44:E596-E605. [PMID: 31046000 DOI: 10.1097/brs.0000000000002918] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Prospective cross-sectional study. OBJECTIVE To determine the health-related quality of life (HRQoL) of adolescent idiopathic scoliosis (AIS) patients undergoing bracing, previously braced and observation only. SUMMARY OF BACKGROUND DATA HRQoL is an important treatment outcome measure for AIS. A poor HRQoL may also negatively influence the success of bracing by reducing the likelihood of good brace compliance. Yet, the HRQoL thresholds for patients undergoing observation only, brace treatment or previous brace treatment is not well understood. METHODS Chinese AIS patients with refined Scoliosis Research Society 22-item (SRS-22r) Questionnaire and 5-level EQ-5D (EQ-5D-5L) Questionnaire scores were consecutively recruited for this cross-sectional study. Patients were grouped based on their treatment modality (observation only, bracing, previously braced, and postoperatively). Coronal and sagittal Cobb angles, degree of apical vertebral rotation, and curve type were studied. Spearman correlation test, independent t test, and one-way analysis of variance (ANOVA) with Tukey Post-hoc test were performed for statistical analysis. RESULTS A total of 652 AIS patients with mean age of 14.8 ± 1.9 years and mean Cobb angle of 18.6° ± 10.0° was studied. The respective mean SRS-22r total scores for bracing, observation, and previously braced groups were 4.20, 4.54, and 4.42, and mean EQ-5D-5L scores were 0.87, 0.95, and 0.92. The total and domain scores were correlated with coronal Cobb angles (P < 0.001) while only EQ-5D-5L correlated with sagittal Cobb angles (P < 0.001). Curves greater than 40° had worse HRQoL (P < 0.001). Currently braced patients had significantly worse HRQoL than those under observation, as indicated by lower EQ-5D-5L (0.08) and SRS-22r (0.35) scores (P < 0.001 to P < 0.05). Previously braced patients had better HRQoL than currently braced patients, with 0.05 higher EQ-5D-5L score (P < 0.001), and 0.23 higher SRS-22r score (P < 0.001). However, currently braced patients were more satisfied with treatment (1.94 difference; P < 0.001) than previously braced. There were no gross differences between patients previously braced and undergoing observation only. CONCLUSION The negative impact of bracing on HRQoL is only transient as previously braced patients have superior HRQoL. It appears as though the EQ-5D-5L scores are more sensitive to changes in the sagittal profile as compared with SRS-22r. Our study highlights the differences in HRQoL between patients only being observed, undergoing bracing or previous brace treatment and the importance of monitoring HRQoL throughout follow-up. Further longitudinal studies may help determine the timing and threshold of HRQoL changes during the entire duration of bracing as well as after brace weaning. LEVEL OF EVIDENCE 2.
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