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Aydogan M, Pehlivanoglu T, Erdag Y, Akturk UD, Akar A. Flexible posterior vertebral tethering for the management of Scheuermann's kyphosis: correction by using growth modulation-clinical and radiographic outcomes of the first 10 patients with at least 3 years of follow-up. 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/s00586-024-08297-4. [PMID: 38740612 DOI: 10.1007/s00586-024-08297-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 04/14/2024] [Accepted: 05/01/2024] [Indexed: 05/16/2024]
Abstract
PURPOSE The present prospective cohort study was intended to present the minimum 3 years' results of flexible posterior vertebral tethering (PVT) applied to 10 skeletally immature patients with SK to question, if it could be an alternative to fusion. METHODS Ten skeletally immature patients with radiographically confirmed SK, who had flexible (minimum 35%) kyphotic curves (T2-T12), were included. A decision to proceed with PVT was based on curve progression within the brace, and/or persistent pain, and/or unacceptable cosmetic concerns of the patient/caregivers, and/or non-compliance within the brace. RESULTS Patients had an average age of 13.1 (range 11-15) and an average follow-up duration of 47.6 months (range 36-60). Posterior vertebral tethering (PVT) was undertaken to all patients by utilizing Wiltse approach and placing monoaxial pedicle screws intermittently. At the final follow-up: mean pre-operative thoracic kyphosis and lumbar lordosis improved from 73.6°-45.7° to 34.7°-32.1°. Mean sagittal vertical axis, vertebral wedge angle and total SRS-22 scores improved significantly. A fulcrum lateral X-ray obtained at the latest follow-up, showed that the tethered levels remained mobile. CONCLUSION This study, for the first time in the literature, concluded, that as a result of growth modulation applied to skeletally immature patients with SK, flexible PVT was detected to yield gradual correction of the thoracic kyphosis by reverting the pathological vertebral wedging process, while keeping the mobility of the tethered segments in addition to successful clinical-functional results. The successful results of the present study answered the role of the PVT as a viable alternative to fusion in skeletally immature patients with SK. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Mehmet Aydogan
- Department of Orthopaedic Surgery and Traumatology, Emsey Advanced Spine Surgery Center, Surgical Spine Center of Excellence Certified By EUROSPINE, Emsey Hospital, Çamlık Mahallesi, Selçuklu Caddesi; No:22, Pendik, 34912, Istanbul, Turkey
| | - Tuna Pehlivanoglu
- Department of Orthopedic Surgery and Traumatology, Liv Spine Center, Liv Hospital Ulus, Ulus Mahallesi, Ahmet Adnan Saygun Caddesi, Canan Sokak, No:4, Beşiktaş, 34340, Istanbul, Turkey.
- Department of Ortopedic Surgery and Traumatology, Faculty of Medicine, Istinye University, Hamidiye, Kâğıthane, 34408, Istanbul, Turkey.
| | - Yigit Erdag
- Department of Orthopedic Surgery and Traumatology, Medar Hospital, Osman Yılmaz Mahallesi, İstanbul Caddesi, No:26, Gebze, 41400, Kocaeli, Turkey
| | - Umut Dogu Akturk
- Department of Neurosurgery, Emsey Advanced Spine Surgery Center, Surgical Spine Center of Excellence Certified By EUROSPINE, Emsey Hospital, Çamlık Mahallesi, Selçuklu Caddesi, No:22, Pendik, 34912, Istanbul, Turkey
| | - Abdulhalim Akar
- Department of Orthopaedic Surgery and Traumatology, Emsey Advanced Spine Surgery Center, Surgical Spine Center of Excellence Certified By EUROSPINE, Emsey Hospital, Çamlık Mahallesi, Selçuklu Caddesi; No:22, Pendik, 34912, Istanbul, Turkey
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Sawada Y, Takahashi S, Terai H, Kato M, Toyoda H, Suzuki A, Tamai K, Yabu A, Iwamae M, Nakamura H. Short-Term Risk Factors for Distal Junctional Kyphosis after Spinal Reconstruction Surgery in Patients with Osteoporotic Vertebrae. Asian Spine J 2024; 18:101-109. [PMID: 38379382 PMCID: PMC10910134 DOI: 10.31616/asj.2023.0174] [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] [Received: 05/29/2023] [Revised: 10/01/2023] [Accepted: 10/30/2023] [Indexed: 02/22/2024] Open
Abstract
STUDY DESIGN Level 3 retrospective cohort case-control study. PURPOSE This study aimed to investigate the risk factors for distal junctional kyphosis (DJK) caused by osteoporotic vertebral fractures following spinal reconstruction surgery, with a focus on the sagittal stable vertebra. OVERVIEW OF LITERATURE Despite the rarity of reports on DJK in this setting, DJK was reported to reduce when the lower instrumented vertebra (LIV) was extended to the sagittal stable vertebra in the posterior corrective fixation for Scheuermann's disease. METHODS This study included 46 patients who underwent spinal reconstruction surgery for thoracolumbar osteoporotic vertebral fractures and kyphosis and were followed up for 1 year postoperatively. DJK was defined as an advanced kyphosis angle >10° between the LIV and one lower vertebra. The patients were divided into groups with and without DJK. The risk factors of the two groups, such as patient background, surgery-related factors, radiographic parameters, and clinical outcomes, were analyzed. RESULTS The DJK and non-DJK groups included 14 and 32 patients, respectively, without significant differences in patient background. Those with instability in the distal adjacent LIV disc had a significantly higher risk of DJK occurrence (28.6% vs. 3.2%, p=0.027). DJK occurrence significantly increased in those with the sagittal stable vertebra not included in the fixation range (57.1% vs. 18.8%, p=0.020). Other preoperative radiographic parameters were not significantly different. Instability in the distal adjacent LIV disc (adjusted odds ratio, 14.50; p=0.029) and the exclusion of the sagittal stable vertebra from the fixation range (adjusted odds ratio, 5.29; p=0.020) were significant risk factors for DJK occurrence. CONCLUSIONS Regarding spinal reconstruction surgery in patients with osteoporotic vertebral fractures, instability in the distal adjacent LIV disc and the exclusion of the sagittal stable vertebra from the fixation range were risk factors for DJK occurrence in the short term.
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Affiliation(s)
- Yuta Sawada
- Department of Orthopaedics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Shinji Takahashi
- Department of Orthopaedics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Hidetomi Terai
- Department of Orthopaedics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Minori Kato
- Department of Orthopaedics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Hiromitsu Toyoda
- Department of Orthopaedics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Akinobu Suzuki
- Department of Orthopaedics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Koji Tamai
- Department of Orthopaedics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Akito Yabu
- Department of Orthopaedics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Masayoshi Iwamae
- Department of Orthopaedics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Hiroaki Nakamura
- Department of Orthopaedics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
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Liu Y, Yuan L, Zeng Y, Li W. Risk Factors for Distal Junctional Problems Following Long Instrumented Fusion for Degenerative Lumbar Scoliosis: Are they Related to the Paraspinal Muscles. Orthop Surg 2023; 15:3055-3064. [PMID: 37749777 PMCID: PMC10694019 DOI: 10.1111/os.13878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 07/31/2023] [Accepted: 08/08/2023] [Indexed: 09/27/2023] Open
Abstract
PURPOSE Although the incidence of distal junctional problems (DJPs) following long construct-based treatment for degenerative lumbar scoliosis (DLS) is lower, affected patients are more likely to require revision surgery when they occur. So the aim of this study is to identify risk factors associated with DJPs to avoid its occurrence by at least 1-year follow-up. METHODS A total of 182 DLS patients undergoing long instrumented fusion surgery (≥4 levels) between February 2011 and March 2022 were retrospectively analyzed. Patients were placed into the DJP group if a DJP occurred at the final follow-up; patients without mechanical complications were matched 1:2 according to age, sex and BMI as the control group. Patient characteristics, surgical variables, radiographic parameters, lumbar muscularity and fatty degeneration were analyzed statistically. The statistical differences in the results between the two groups (p values <0.05) and other variables selected by experts were entered into a multivariate logistic regression model, and the forwards likelihood ratio method was used to analyze the independent risk factors for DJPs. RESULTS Twenty-four (13.2%) patients suffered a DJP in the postoperative period and the reoperation rate was 8.8%. On univariate analysis, the lowest instrumented vertebra (LIV) CT value (p = 0.042); instrumented levels (p = 0.030); preoperative coronal vertical axis (CVA) (p = 0.046), thoracolumbar kyphosis (TLK) (p = 0.006), L4-S1 lordosis (p = 0.013), sacral slop (SS) (p = 0.030), pelvic tilt (PT) classification (p = 0.004), and sagittal vertical axis (SVA) (p = 0.021); TLK correction (p = 0.049); post-operative CVA (p = 0.029); Overall, There was no significant difference in the paraspinal muscle parameters between the two groups. On multivariate analysis, instrumented levels (OR = 1.595; p = 0.035), preoperative SVA (OR = 1.016; p = 0.022) and preoperative PT (OR = 0.873; p = 0.001) were identified as significant independent risk factors for DJP. CONCLUSION Longer instrumented levels, a greater preoperative SVA and a smaller PT were found to be strongly associated with the presence of DJPs in patients treated for DLS. The degeneration of the paraspinal muscles may not be related to the occurrence of DJPs. For DLS patients, the occurrence of DJP can be reduced by selecting reasonable fusion segments and evaluating the patient's sagittal balance and spino-pelvic parameters before operation.
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Affiliation(s)
- Yinhao Liu
- Orthopaedic DepartmentPeking University Third HospitalBeijingChina
- Peking University Health Science CenterBeijingChina
- Beijing Key Laboratory of Spinal Disease ResearchBeijingChina
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of EducationBeijingChina
| | - Lei Yuan
- Orthopaedic DepartmentPeking University Third HospitalBeijingChina
- Beijing Key Laboratory of Spinal Disease ResearchBeijingChina
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of EducationBeijingChina
| | - Yan Zeng
- Orthopaedic DepartmentPeking University Third HospitalBeijingChina
- Beijing Key Laboratory of Spinal Disease ResearchBeijingChina
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of EducationBeijingChina
| | - Weishi Li
- Orthopaedic DepartmentPeking University Third HospitalBeijingChina
- Beijing Key Laboratory of Spinal Disease ResearchBeijingChina
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of EducationBeijingChina
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O’Donnell JM, Wu W, Youn A, Mann A, Swarup I. Scheuermann Kyphosis: Current Concepts and Management. Curr Rev Musculoskelet Med 2023; 16:521-530. [PMID: 37615931 PMCID: PMC10587050 DOI: 10.1007/s12178-023-09861-z] [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] [Accepted: 08/07/2023] [Indexed: 08/25/2023]
Abstract
PURPOSE OF REVIEW Scheuermann's kyphosis (SK) is a developmental deformity of the spine that affects up to 8% of children in the US. Although, the natural progression of SK is noted to be gradual over years, severe deformity can be associated with significant morbidity. Thorough clinical examination and interpretation of relevant imaging help differentiate and confirm this diagnosis. Treatment includes both operative and nonoperative approaches. The purpose of this article is to provide an updated overview of the current theories of its pathogenesis, as well as the principles of diagnosis and treatment of SK. RECENT FINDINGS Although a definitive, unified theory continues to be elusive, numerous reports in the past decade provide insight into the pathophysiology of SK. These include alterations in mechanical stress and/or hormonal disturbances. Candidate genes have also been identified to be linked to the inheritance of SK. Updates to nonoperative treatment include the effectiveness of dedicated exercise programs, as well as the types and duration of orthotic treatment. Advances in surgical technique can be observed with a trend toward a posterior-only approach, with supporting evidence for careful evaluation of both the sagittal and coronal planes to determine fusion levels in order to avoid postoperative junctional pathologies. SK is an important cause of structural or rigid kyphosis. It can lead to significant morbidity in severe cases. Treatment is based on curve magnitude and symptoms. Nonoperative treatment consists of physical therapy in symptomatic patients, and bracing can be added for skeletally mature patients. Operative management can be considered in patients with large, progressive, and symptomatic deformity. Future studies can benefit from a focused investigation into patient-reported outcomes after undergoing appropriate treatment.
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Affiliation(s)
| | - Wei Wu
- Department of Orthopedic Surgery, UCSF Benioff Children’s Hospital, 747 52nd Street, OPC 1st Floor, Oakland, CA 94609 USA
| | - Alex Youn
- San Francisco School of Medicine, University of California, San Francisco, CA USA
| | - Angad Mann
- California Health Sciences University College of Medicine, Clovis, CA USA
| | - Ishaan Swarup
- Department of Orthopedic Surgery, UCSF Benioff Children’s Hospital, 747 52nd Street, OPC 1st Floor, Oakland, CA 94609 USA
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Xu Y, Ling C, Xu H, Kiram A, Li J, Hu Z, Zhu Z, Qiu Y, Liu Z. Selecting the Vertebra above Sagittal Stable Vertebra as the Distal Fusion Level in Scheuermann's Kyphosis: A Prospective Study with a Minimum of 2-Year Follow-Up. Orthop Surg 2023; 15:2638-2646. [PMID: 37620983 PMCID: PMC10549797 DOI: 10.1111/os.13854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/27/2023] [Accepted: 06/30/2023] [Indexed: 08/26/2023] Open
Abstract
OBJECTIVE The proper selection of the lower instrumented vertebra (LIV) remains controversial in the surgical treatment of Scheuermann's disease and there is a paucity of studies investigating the clinical outcomes of fusion surgery when selecting the vertebra one level proximal to the sagittal stable vertebra (SSV-1) as LIV. The purpose of this study is to investigate whether SSV-1 could be a valid LIV for Scheuermann kyphosis (SK) patients with different curve patterns. METHODS This was a prospective study on consecutive SK patients treated with posterior surgery between January 2018 and September 2020, in which the distal fusion level ended at SSV-1. The LIV was selected at SSV-1 only in patients with Risser >2 and with LIV translation less than 40 mm. All of the patients had a minimum of 2-year follow-up. Patients were further grouped based on the sagittal curve pattern as thoracic kyphosis (TK, n = 23) and thoracolumbar kyphosis (TLK, n = 13). Radiographic parameters including global kyphosis (GK), lumbar lordosis (LL), sagittal vertical axis (SVA), LIV translation, pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS) were measured preoperatively, postoperatively, and at the latest follow-up. The intraoperative and postoperative complications were recorded. The Scoliosis Research Society (SRS)-22 scores were performed to evaluate clinical outcomes. RESULTS A total of 36 patients were recruited in this study, with 23 in the TK group and 13 in the TLK group. In TK group, the GK was significantly decreased from 80.8° ± 10.1° to 45.4° ± 7.7° after surgery, and was maintained at 45.3° ± 8.6° at the final follow-up. While in the TLK group, GK was significantly decreased from 70.7° ± 9.2° to 39.1° ± 5.4° after surgery (p < 0.001) and to 39.3° ± 4.5° at the final follow-up. Meanwhile, despite presenting with different sagittal alignment, significant improvement was observed in LL, SVA, and LIV translation for both TK and TLK groups (p < 0.05). Self-reported scores of pain and self-image in TK group and scores of self-image and function in TLK group showed significant improvement at the final follow-up (all p < 0.05). Distal junctional kyphosis (DJK) was observed in two patients (8.7%) in TK group, and one patient (7.7%) in TLK group. No revision surgery was performed. CONCLUSION Selecting SSV-1 as LIV can achieve satisfactory radiographic and clinical outcomes for SK patients with different curve patterns without increasing the risk of DJK. This selection strategy could be a favorable option for SK patients with Risser sign >2 and LIV translation less than 40 mm.
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Affiliation(s)
- Yanjie Xu
- Division of Spine Surgery, Department of Orthopedic SurgeryNanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
| | - Chen Ling
- Division of Spine Surgery, Department of Orthopedic SurgeryNanjing Drum Tower Hospital, Clinical College of Nanjing Medical UniversityNanjingChina
| | - Hui Xu
- Division of Spine Surgery, Department of Orthopedic SurgeryNanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
| | - Abdukahar Kiram
- Division of Spine Surgery, Department of Orthopedic SurgeryNanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
| | - Jie Li
- Division of Spine Surgery, Department of Orthopedic SurgeryNanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
| | - Zongshan Hu
- Division of Spine Surgery, Department of Orthopedic SurgeryNanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
| | - Zezhang Zhu
- Division of Spine Surgery, Department of Orthopedic SurgeryNanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
- Division of Spine Surgery, Department of Orthopedic SurgeryNanjing Drum Tower Hospital, Clinical College of Nanjing Medical UniversityNanjingChina
| | - Yong Qiu
- Division of Spine Surgery, Department of Orthopedic SurgeryNanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
- Division of Spine Surgery, Department of Orthopedic SurgeryNanjing Drum Tower Hospital, Clinical College of Nanjing Medical UniversityNanjingChina
| | - Zhen Liu
- Division of Spine Surgery, Department of Orthopedic SurgeryNanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
- Division of Spine Surgery, Department of Orthopedic SurgeryNanjing Drum Tower Hospital, Clinical College of Nanjing Medical UniversityNanjingChina
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Marciano GF, Simhon ME, Lehman RA, Lenke LG. Strategies to Avoid Distal Junctional Pathology. Neurosurg Clin N Am 2023; 34:585-597. [PMID: 37718105 DOI: 10.1016/j.nec.2023.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Abstract
Distal junctional pathology remains an unsolved issue in spine surgery. Distal junctional pathology can occur on a spectrum from asymptomatic radiographic finding to catastrophic distal construct failure. It is significant to address as postoperative sagittal balance has been shown to be correlated with patient-reported outcomes. Current literature and clinical experience suggest there are techniques that can be implemented regardless of setting to avoid distal junctional pathology. Much of the avoidant strategy relies on understanding the deformity pathology, selection of the lowest instrumented vertebra (LIV), health of the segments caudal to the LIV, and methods of fixation.
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Affiliation(s)
- Gerard F Marciano
- Department of Orthopedics, Columbia University Medical Center, 622 West 168th Street, PH 11- Center, New York, NY 10032, USA.
| | - Matthew E Simhon
- Department of Orthopedics, Columbia University Medical Center, 622 West 168th Street, PH 11- Center, New York, NY 10032, USA
| | - Ronald A Lehman
- The Daniel and Jane Och Spine Hospital at New York-Presbyterian/Allen, 5141 Broadway, New York, NY 10034, USA
| | - Lawrence G Lenke
- The Daniel and Jane Och Spine Hospital at New York-Presbyterian/Allen, Och Spine/Allen NYP Hospital, 5141 Broadway, New York, NY 10034, USA
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Ye J, Rider SM, Lafage R, Gupta S, Farooqi AS, Protopsaltis TS, Passias PG, Smith JS, Lafage V, Kim HJ, Klineberg EO, Kebaish KM, Scheer JK, Mundis GM, Soroceanu A, Bess S, Ames CP, Shaffrey CI, Gupta MC. Distal junctional kyphosis in adult cervical deformity patients: where does it occur? 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; 32:1598-1606. [PMID: 36928488 DOI: 10.1007/s00586-023-07631-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 01/19/2023] [Accepted: 02/28/2023] [Indexed: 03/18/2023]
Abstract
PURPOSE To evaluate the impact of the lowest instrumented vertebra (LIV) on Distal Junctional kyphosis (DJK) incidence in adult cervical deformity (ACD) surgery. METHODS Prospectively collected data from ACD patients undergoing posterior or anterior-posterior reconstruction at 13 US sites was reviewed up to 2-years postoperatively (n = 140). Data was stratified into five groups by level of LIV: C6-C7, T1-T2, T3-Apex, Apex-T10, and T11-L2. DJK was defined as a kyphotic increase > 10° in Cobb angle from LIV to LIV-1. Analysis included DJK-free survival, covariate-controlled cox regression, and DJK incidence at 1-year follow-up. RESULTS 25/27 cases of DJK developed within 1-year post-op. In patients with a minimum follow-up of 1-year (n = 102), the incidence of DJK by level of LIV was: C6-7 (3/12, 25.00%), T1-T2 (3/29, 10.34%), T3-Apex (7/41, 17.07%), Apex-T10 (8/11, 72.73%), and T11-L2 (4/8, 50.00%) (p < 0.001). DJK incidence was significantly lower in the T1-T2 LIV group (adjusted residual = -2.13), and significantly higher in the Apex-T10 LIV group (adjusted residual = 3.91). In covariate-controlled regression using the T11-L2 LIV group as reference, LIV selected at the T1-T2 level (HR = 0.054, p = 0.008) or T3-Apex level (HR = 0.081, p = 0.010) was associated with significantly lower risk of DJK. However, there was no difference in DJK risk when LIV was selected at the C6-C7 level (HR = 0.239, p = 0.214). CONCLUSION DJK risk is lower when the LIV is at the upper thoracic segment than the lower cervical segment. DJK incidence is highest with LIV level in the lower thoracic or thoracolumbar junction.
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Affiliation(s)
- Jichao Ye
- Department of Orthopaedic Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong Province, China
| | - Sean M Rider
- Department of Orthopaedic Surgery, Washington University School of Medicine, 660 S. Euclid, Campus, Box 8233, St. Louis, MO, 63110, USA
| | - Renaud Lafage
- Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY, USA
| | - Sachin Gupta
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Ali S Farooqi
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | | | - Peter G Passias
- Department of Orthopaedic Surgery, NYU Langone Orthopedic Hospital, New York, NY, USA
| | - Justin S Smith
- Department of Neurosurgery, University of Virginia Medical Center, Charlottesville, VA, USA
| | - Virginie Lafage
- Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY, USA
| | - Han-Jo Kim
- Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY, USA
| | - Eric O Klineberg
- Department of Orthopaedic Surgery, University of California, Davis, Sacramento, CA, USA
| | - Khaled M Kebaish
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, USA
| | - Justin K Scheer
- Department of Neurological Surgery, University of California, San Francisco, CA, USA
| | - Gregory M Mundis
- Department of Orthopedic Surgery, Scripps Clinic Torrey Pines, La Jolla, CA, USA
| | - Alex Soroceanu
- University of Calgary Spine Program, University of Calgary, Alberta, Canada
| | - Shay Bess
- Rocky Mountain Hospital for Children, Presbyterian/St Luke's Medical Center, Denver, CO, USA
| | - Christopher P Ames
- Department of Neurological Surgery, University of California, San Francisco, CA, USA
| | - Christopher I Shaffrey
- Departments of Neurological Surgery and Orthopedic Surgery, Duke University, Durham, NC, USA
| | - Munish C Gupta
- Department of Orthopaedic Surgery, Washington University School of Medicine, 660 S. Euclid, Campus, Box 8233, St. Louis, MO, 63110, USA.
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Mikhaylovskiy MV, Gubina EV, Aleksandrova NL, Lukinov VL, Mairambekov IM, Sergunin AY. Long-term results of surgical correction of Scheuermann’s kyphosis. HIRURGIÂ POZVONOČNIKA (SPINE SURGERY) 2022. [DOI: 10.14531/ss2022.4.6-18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Objective. To analyze long-term results of surgical correction of kyphosis due to Scheuermann’s disease.Material and Methods. Design: retrospective cohort study. The study group included 43 patients (m/f ratio, 34/9). The mean age was 19.1 (14–32) years; the mean postoperative follow-up was 6 ± 10 (5–20) years. Two-stage surgery including discectomy and interbody fusion followed by posterior correction and fusion was conducted in 35 cases (Group A). Eight patients (Group B) underwent only posterior correction and spinal fusion. The following parameters were determined for each patient: thoracic kyphosis (TK), lumbar lordosis (LL) (scoliotic deformity of the thoracic/thoracolumbar spine, if the curve magnitude was > 5°), sagittal vertical axis (SVA), sagittal stable vertebra (SSV), first lordotic vertebra (FLV), proximal junctional angle (PJA) and distal junctional angle (DJA). All measurements were performed immediately before surgery, one week after surgery, and at the end of the follow-up period. All patients answered the SRS-24 questionnaire after surgery and at end of the follow-up period.Results. Groups were comparable in terms of age and gender of patients, body mass index and initial Cobb angle (p < 0.05). The curve decreased from 77.8° to 40.7° in Group A and from 81.7° to 41.6° in Group B. The loss of correction was 9.1° and 6.0° in groups A and B, respectively. The parameters of lumbar lordosis remained normal during the follow-up period. At implant density less than 1.2, deformity correction and correction loss were 44.5° (54.7 %) and 3.9°, respectively (p < 0.05). Proximal junctional kyphosis (PJK) was detected in 21 out of 43 patients (48.8 %). The frequency of PJK was 45.4 % among patients whose upper end vertebra was included in the fusion and 60 % among those whose upper end vertebra was not included. PJK developed in eight (47.8 %) out of 17 patients with kyphosis correction ≥ 50 % and in 13 (50.0 %) of those with correction < 50 %. The rate of DJK development was 39.5 %. The lower instrumented vertebra (LIV) was located proximal to the sagittal stable vertebra in 16 cases, with 12 (75 %) of them being diagnosed with DJK. In 27 patients, LIV was located either at the SSV level or distal to it, the number of DJK cases was 5 (18.5 %); p < 0.05. Only two patients with complications required unplanned interventions. According to the patient questionnaires, the surgical outcome score increases between the immediate and long-term postoperative periods for all domains and from 88.4 to 91.4 in total. The same applies to answer to the question about consent to surgical treatment on the same conditions: positive answers increased from 82 to 86 %.Conclusions. Two-stage surgery, as a more difficult and prolonged one, has no advantages over one-stage operation in terms of correction magnitude and stability of the achieved effect. Surgical treatment improves the quality of life of patients with Scheuermann’s disease, and the improvement continues in the long-term postoperative period.
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Affiliation(s)
- M. V. Mikhaylovskiy
- Novosibirsk Research Institute of Traumatology and Orthopaeducs n.a. Ya.L. Tsivyan
17 Frunze str., Novosibirsk, 630091, Russia
| | - E. V. Gubina
- Novosibirsk Research Institute of Traumatology and Orthopaedics n.a. Ya.L. Tsivyan
17 Frunze str., Novosibirsk, 630091, Russia
| | - N. L. Aleksandrova
- Novosibirsk Research Institute of Traumatology and Orthopaeducs n.a. Ya.L. Tsivyan
17 Frunze str., Novosibirsk, 630091, Russia
| | - V. L. Lukinov
- Novosibirsk Research Institute of Traumatology and Orthopaeducs n.a. Ya.L. Tsivyan
17 Frunze str., Novosibirsk, 630091, Russia
| | - I. M. Mairambekov
- Novosibirsk Research Institute of Traumatology and Orthopaeducs n.a. Ya.L. Tsivyan
17 Frunze str., Novosibirsk, 630091, Russia
| | - A. Yu. Sergunin
- Novosibirsk Research Institute of Traumatology and Orthopaedics n.a. Ya.L. Tsivyan
17 Frunze str., Novosibirsk, 630091, Russia
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9
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Sebaaly A, Farjallah S, Kharrat K, Kreichati G, Daher M. Scheuermann's kyphosis: update on pathophysiology and surgical treatment. EFORT Open Rev 2022; 7:782-791. [PMID: 36475554 PMCID: PMC9780615 DOI: 10.1530/eor-22-0063] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Scheuermann's Kyphosis (SK) is a rigid spinal kyphosis. Several theories have been proposed concerning its pathogenesis, but it is, to this day, still unknown. It has a prevalence of 0.4-8.3% in the population with a higher incidence in females. Clinical examination with x-rays is needed to differentiate and confirm this diagnosis. Non-surgical management is reserved for smaller deformities and in skeletally immature patients, whereas surgery is recommended for higher deformities. Combined anterior and posterior approach was considered the gold standard for the surgical treatment of this disease, but there is an increasing trend toward posterior-only approaches especially with use of segmental fixation. This study reviews the pathophysiology of SK while proposing a treatment algorithm for its management.
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Affiliation(s)
- Amer Sebaaly
- School of Medicine, Saint Joseph University, Beirut, Lebanon,Orthopedic Department, Spine Unit, Hotel Dieu de France Hospital, Beirut, Lebanon,Correspondence should be addressed to A Sebaaly;
| | - Sarah Farjallah
- Orthopedic Department, Spine Unit, Hotel Dieu de France Hospital, Beirut, Lebanon
| | - Khalil Kharrat
- Orthopedic Department, Spine Unit, Hotel Dieu de France Hospital, Beirut, Lebanon
| | - Gaby Kreichati
- School of Medicine, Saint Joseph University, Beirut, Lebanon,Orthopedic Department, Spine Unit, Hotel Dieu de France Hospital, Beirut, Lebanon
| | - Mohammad Daher
- School of Medicine, Saint Joseph University, Beirut, Lebanon
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Wang Y, Zhu W, Sun K, Kong C, Wang W, Lu S. Selecting proper distal fusion level in severe thoracolumbar kyphosis secondary to late osteoporotic vertebral compression fracture to limit distal complications. J Orthop Sci 2022; 27:1177-1184. [PMID: 34531084 DOI: 10.1016/j.jos.2021.07.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 06/18/2021] [Accepted: 07/16/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND Surgical treatment of severe thoracolumbar kyphosis (TLK) secondary to late osteoporotic vertebral compression fracture (OVCF) presents several challenges to spine surgeons. Proper selection of distal fusion level is an important issue in surgical planning to decrease the likelihood of distal mechanical complications. This study was designed to compare the clinical and radiographic outcomes in elderly patients suffering from severe TLK related with late OVCF between different distal fusion strategies and to recommend a superior distal fusion level for these patients. METHODS A total of 57 consecutive subjects with a minimum follow-up of two years were retrospectively reviewed. TLK was defined as the hyperkyphosis with an apex below T10. Severe TLK was defined as the Cobb angle of kyphosis ≥60°. Patients fused to sagittal stable vertebra (SSV) were assigned to Group SSV, while those fused to the vertebra above and below SSV were assigned to Groups SSV- and SSV+, respectively. Bone cement was used to enhance pedicle screw fixation. Clinical and radiographic results were collected and compared between different groups. RESULTS Deformity corrections and living quality improvements at the latest follow-up were superior in Group SSV than Group SSV- with shorter fusion levels, while to the equal extent with Group SSV+ with longer fusion levels. 7 cases of distal complications were observed in Group SSV-. Negatively balanced lowest instrumented vertebra was revealed to be the independent factor predicting distal complications. Patients' satisfaction of their surgical management was greater in Group SSV than Group SSV- (83.2 ± 4.4% vs. 70.5 ± 10.9%, P = 0.024), while comparable with Groups SSV + SSV+ (84.8 ± 5.7%). CONCLUSIONS Fusion to SSV with cement-augmented pedicle screws could limit the development of distal junctional mechanical complications after surgical treatment for severe TLK secondary to late OVCF in elderly patients, while achieves satisfactory deformity correction with the preservation of necessary lumbar motility.
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Affiliation(s)
- Yu Wang
- Department of Orthopaedic Surgery, Capital Medical University Xuanwu Hospital, Beijing, China; National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - Weiguo Zhu
- Department of Orthopaedic Surgery, Capital Medical University Xuanwu Hospital, Beijing, China; National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - Kang Sun
- Department of Orthopaedic Surgery, Capital Medical University Xuanwu Hospital, Beijing, China; National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - Chao Kong
- Department of Orthopaedic Surgery, Capital Medical University Xuanwu Hospital, Beijing, China; National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - Wei Wang
- Department of Orthopaedic Surgery, Capital Medical University Xuanwu Hospital, Beijing, China; National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - Shibao Lu
- Department of Orthopaedic Surgery, Capital Medical University Xuanwu Hospital, Beijing, China; National Clinical Research Center for Geriatric Diseases, Beijing, China.
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Luzzi A, Sardar Z, Cerpa M, Ferrer X, Coury J, Crockatt W, Ha A, Roye B, Vitale M, Lenke L. Risk of distal junctional kyphosis in scheuermann's kyphosis is decreased by selecting the LIV as two vertebrae distal to the first lordotic disc. Spine Deform 2022; 10:1437-1442. [PMID: 35840788 DOI: 10.1007/s43390-022-00542-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 06/04/2022] [Indexed: 12/01/2022]
Abstract
PURPOSE To determine whether (1) distal junctional kyphosis (DJK) is decreased by selecting the stable sagittal vertebra (SSV), versus the vertebra below the 1st lordotic disc (1stLD), as the lowest instrumented level (LIV); (2) DJK is decreased if the LIV is two versus one vertebrae distal to the 1stLD. METHODS A multi-institution prospective database was queried for SK patients who underwent posterior-only instrumentation and fusion with > 2 year follow-up. DJK was defined as > 10° change in the distal junctional angle postoperative from the preoperative junctional angle. Statistical analysis was performed using t test, chi-square test and logistic regression. RESULTS Of 94 patients included, 38 (40%) developed radiographic DJK. 31 (39%) patients in whom the LIV was at or distal to the SSV developed DJK, whereas 7 (47%) in whom the LIV was proximal to the SSV developed DJK. 20 (59%) patients in whom the LIV was one vertebra below and 10 (22%) in whom the LIV was two vertebrae below the 1stLD developed DJK. Logistic regression demonstrated a significant increase in DJK development if the LIV was one vertebra below the 1stLD (OR = 3.2 (1.28-8.18)). There was not a significant relationship between DJK development and LIV position relative to the SSV. CONCLUSION In SK surgery, LIV selection/fusion to two vertebrae below the 1stLD decreased the development of DJK. A significant relationship was not found between DJK development and location of distal fusion level in regards to the SSV, possibly due to the small number of patients who had LIV proximal to SSV.
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Affiliation(s)
- Andrew Luzzi
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, 622 W168th Street, PH-11, New York, 10032, NY, United States.
| | - Zeeshan Sardar
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, 622 W168th Street, PH-11, New York, 10032, NY, United States
| | - Meghan Cerpa
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, 622 W168th Street, PH-11, New York, 10032, NY, United States
| | - Xavier Ferrer
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, 622 W168th Street, PH-11, New York, 10032, NY, United States
| | - Josephine Coury
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, 622 W168th Street, PH-11, New York, 10032, NY, United States
| | - William Crockatt
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, 622 W168th Street, PH-11, New York, 10032, NY, United States
| | - Alex Ha
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, 622 W168th Street, PH-11, New York, 10032, NY, United States
| | - Benjamin Roye
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, 622 W168th Street, PH-11, New York, 10032, NY, United States
| | - Michael Vitale
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, 622 W168th Street, PH-11, New York, 10032, NY, United States
| | - Lawrence Lenke
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, 622 W168th Street, PH-11, New York, 10032, NY, United States
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Selection of the optimal distal fusion level for Scheuermann kyphosis with different curve patterns: when can we stop above the sagittal stable vertebra? 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; 31:1710-1718. [PMID: 35039966 DOI: 10.1007/s00586-021-07039-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 09/28/2021] [Accepted: 10/18/2021] [Indexed: 10/19/2022]
Abstract
PURPOSE To investigate the optimal lowest instrumented vertebra (LIV) in the treatment of Scheuermann kyphosis (SK) with different curve patterns. METHODS Fifty-two SK patients who underwent posterior surgery between January 2010 and December 2017 with a minimum follow-up of 2 years were retrospectively reviewed. Patients were divided into two groups based on the curve pattern: the Scheuermann thoracic kyphosis (STK group) or Scheuermann thoracolumbar kyphosis (STLK group). Based on the relationship between the sagittal stable vertebra (SSV) and LIV, both groups were further divided into the SSV group and SSV-1 group. Radiographic parameters, distal junctional kyphosis (DJK) incidence and SRS-22 questionnaire scores were evaluated. RESULTS In STK and STLK groups, there were no significant differences in most pre- and postoperative radiographic assessments between SSV and SSV-1 subgroups. DJK incidence showed no significant differences between groups during follow-up (P > 0.05). LIV-PSVL was significantly more negative in the SSV-1 group than that in the SSV group (P < 0.001). Within the SSV-1 group, patients with DJK showed a more negative LIV-PSVL (P = 0.039). Moderate correlation was observed between preoperative LIV-PSVL and DJK with a Spearman coefficient of - 0.474 (P = 0.035). Receiver operative characteristic curve analysis showed that the threshold value of preoperative LIV-PSVL to predict DJK was - 37.35 mm (area under the curve 0.882). CONCLUSION Shorter fusion stopping at SSV-1 achieved comparable clinical outcomes and did not increase the risk of DJK for both STK and STLK patients. For patients whose preoperative LIV-PSVL < - 37.35 mm, extending fusion to SSV is an acceptable solution to prevent DJK.
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Zhang H, Hai Y, Meng X, Zhang X, Jiang T, Xu G, Zou C, Xing Y. Validity of the Roussouly classification system for assessing distal junctional problems after long instrumented spinal fusion in degenerative 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; 31:258-266. [PMID: 35018495 DOI: 10.1007/s00586-021-07083-w] [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: 05/07/2021] [Revised: 09/07/2021] [Accepted: 11/30/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE To evaluate the validity of the Roussouly classification system for assessing distal junctional problems (DJP) after long instrumented spinal fusion in degenerative scoliosis. METHODS Sixty-four patients with degenerative scoliosis and long-segment fixation receiving treatment at our hospital between December 2012 and December 2018 were retrospectively analyzed. Patients were classified preoperatively and postoperatively (Roussouly classification) and divided into DJP and control groups. We observed whether patients restored to their preoperative Roussouly classification (based on pelvic incidence [PI]) postoperatively. RESULTS The incidences of DJP were 11.11% and 50% in patients who did and did not match their sagittal Roussouly classification immediately postoperatively, respectively. The adjusted Chi-square test that showed whether the sagittal profile matched the Roussouly classification immediately after surgery was statistically significant (P = 0.012). PIs were 55.83 ± 4.94 and 47.21 ± 10.81 in the DJP and non-DJP groups, respectively (t' = 4.367, P < 0.001). Distal junctional kyphosis angles were 6.33 ± 4.19° and 11.56 ± 5.02° in the DJP and non-DJP groups, respectively (t = - 2.595, P = 0.015). Preoperative PI-lumbar lordosis values were 29.14 ± 13.82 and 16.67 ± 11.39 in the DJP and non-DJP groups, respectively (t = - 2.626, P = 0.013). The logistic regression model showed that patients whose Roussouly classification did not match the postoperative PI value were more likely to have DJP (odds ratio [OR] = 4.01, 95% confidence interval [CI]: 0.51-31.61) and preoperative distal junctional kyphotic changes. CONCLUSION If the postoperative sagittal profile can be restored to match the patient's own PI value, use of the Roussouly classification can greatly reduce the possibility of postoperative DJP.
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Affiliation(s)
- Hanwen Zhang
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, China
| | - Yong Hai
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, China.
| | - Xianglong Meng
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, China
| | - Xinuo Zhang
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, China
| | - Tinghua Jiang
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, China
| | - Gang Xu
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, China
| | - Congying Zou
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, China
| | - Yaozhong Xing
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, China
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Surgical correction of Scheuermann’s kyphosis by posterior-only approach: a prospective study. CURRENT ORTHOPAEDIC PRACTICE 2022. [DOI: 10.1097/bco.0000000000001063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Bortz C, Passias PG, Pierce KE, Alas H, Brown A, Naessig S, Ahmad W, Lafage R, Ames CP, Diebo BG, Line BG, Klineberg EO, Burton DC, Eastlack RK, Kim HJ, Sciubba DM, Soroceanu A, Bess S, Shaffrey CI, Schwab FJ, Smith JS, Lafage V. Radiographic benefit of incorporating the inflection between the cervical and thoracic curves in fusion constructs for surgical cervical deformity patients. JOURNAL OF CRANIOVERTEBRAL JUNCTION AND SPINE 2020; 11:131-138. [PMID: 32905029 PMCID: PMC7462144 DOI: 10.4103/jcvjs.jcvjs_57_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 05/07/2020] [Indexed: 11/24/2022] Open
Abstract
Purpose: The aim is to assess the relationship between cervicothoracic inflection point and baseline disability, as well as the relationship between clinical outcomes and pre- to postoperative changes in inflection point. Methods: Cervical deformity (CD) patients with baseline and 3-month (3M) postoperative radiographic, clinical, and inflection data were grouped by region of inflection point: C6 or above, C6-C7 to C7-T1, T1, or below. Inflection was defined as: Distal-most level where cervical lordosis (CL) changes to thoracic kyphosis (TK). Differences in alignment and patient factors across pre- and postoperative inflection point groups were assessed, as were outcomes by the inclusion of inflection in the CD-corrective fusion construct. Results: A total of 108 patients were included. Preoperative inflection breakdown: C6 or above (42%), C6-C7 to C7-T1 (44%), T1 or below (15%). Surgery was associated with a caudal migration of inflection by 3M: C6 or above (8%), C6-C7 to C7-T1 (58%), T1 or below (33%). For patients with preoperative inflection T1 or below, the inclusion of inflection in the fusion construct was associated with improvements in horizontal gaze (McGregor's Slope included: −11.3° vs. not included: 1.6°, P = 0.038). The inclusion of preoperative inflection in fusion was associated with the superior cervical sagittal vertical axis (cSVA) changes for C6-C7 to C7-T1 patients (−5.2 mm vs. 3.2 mm, P = 0.018). The location of postoperative inflection was associated with variation in 3M alignment: Inflection C6 or above was associated with less Pelvic Tilt (PT), PT and a trend of larger cSVA. Location of inflection or inclusion in fusion was not associated with reoperation or distal junctional kyphosis. Conclusions: Incorporating the inflection point between CL and TK in the fusion construct was associated with superior restoration of cervical alignment and horizontal gaze for surgical CD patients.
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Affiliation(s)
- Cole Bortz
- Department of Orthopedics, NYU Langone Orthopedic Hospital, NY, USA
| | - Peter G Passias
- Department of Orthopedics, NYU Langone Orthopedic Hospital, NY, USA
| | | | - Haddy Alas
- Department of Orthopedics, NYU Langone Orthopedic Hospital, NY, USA
| | - Avery Brown
- Department of Orthopedics, NYU Langone Orthopedic Hospital, NY, USA
| | - Sara Naessig
- Department of Orthopedics, NYU Langone Orthopedic Hospital, NY, USA
| | - Waleed Ahmad
- Department of Orthopedics, NYU Langone Orthopedic Hospital, NY, USA
| | - Renaud Lafage
- Department of Orthopedics, Hospital for Special Surgery New York, NY, USA
| | - Christopher P Ames
- Department of Neurological Surgery, University of California, San Francisco, CA, USA
| | - Bassel G Diebo
- Department of Orthopedic Surgery, SUNY Downstate Medical Center, Brooklyn, NY, USA
| | - Breton G Line
- Department of Spine Surgery, Denver International Spine Clinic, Presbyterian St. Luke's/Rocky Mountain Hospital for Children, Denver, CO, USA
| | - Eric O Klineberg
- Department of Orthopedic Surgery, University of California, Davis, CA, USA
| | - Douglas C Burton
- Department of Orthopedic Surgery, University of Kansas Medical Center, Kansas City, KS, USA
| | | | - Han Jo Kim
- Department of Orthopedics, Hospital for Special Surgery New York, NY, USA
| | - Daniel M Sciubba
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Alex Soroceanu
- Department of Orthopaedic Surgery, University of Calgary, Calgary, AB, Canada
| | - Shay Bess
- Department of Spine Surgery, Denver International Spine Clinic, Presbyterian St. Luke's/Rocky Mountain Hospital for Children, Denver, CO, USA
| | | | - Frank J Schwab
- Department of Orthopedics, Hospital for Special Surgery New York, NY, USA
| | - Justin S Smith
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
| | - Virginie Lafage
- Department of Orthopedics, Hospital for Special Surgery New York, NY, USA
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Huq S, Ehresman J, Cottrill E, Ahmed AK, Pennington Z, Westbroek EM, Sciubba DM. Treatment approaches for Scheuermann kyphosis: a systematic review of historic and current management. J Neurosurg Spine 2020; 32:235-247. [DOI: 10.3171/2019.8.spine19500] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 08/09/2019] [Indexed: 11/06/2022]
Abstract
OBJECTIVEScheuermann kyphosis (SK) is an idiopathic kyphosis characterized by anterior wedging of ≥ 5° at 3 contiguous vertebrae managed with either nonoperative or operative treatment. Nonoperative treatment typically employs bracing, while operative treatment is performed with either a combined anterior-posterior fusion or posterior-only approach. Current evidence for these approaches has largely been derived from retrospective case series or focused reviews. Consequently, no consensus exists regarding optimal management strategies for patients afflicted with this condition. In this study, the authors systematically review the literature on SK with respect to indications for treatment, complications of treatment, differences in correction and loss of correction, and changes in treatment over time.METHODSUsing PubMed, Embase, CINAHL, Web of Science, and the Cochrane Library, all full-text publications on the operative and nonoperative treatment for SK in the peer-reviewed English-language literature between 1950 and 2017 were screened. Inclusion criteria involved fully published, peer-reviewed, retrospective or prospective studies of the primary medical literature. Studies were excluded if they did not provide clinical outcomes and statistics specific to SK, described fewer than 2 patients, or discussed results in nonhuman models. Variables extracted included treatment indications and methodology, maximum pretreatment kyphosis, immediate posttreatment kyphosis, kyphosis at last follow-up, year of treatment, and complications of treatment.RESULTSOf 659 unique studies, 45 met our inclusion criteria, covering 1829 unique patients. Indications for intervention were pain, deformity, failure of nonoperative treatment, and neural impairment. Among operatively treated patients, the most common complications were hardware failure and proximal or distal junctional kyphosis. Combined anterior-posterior procedures were additionally associated with neural, pulmonary, and cardiovascular complications. Posterior-only approaches offered superior correction compared to combined anterior-posterior fusion; both groups provided greater correction than bracing. Loss of correction was similar across operative approaches, and all were superior to bracing. Cross-sectional analysis suggested that surgeons have shifted from anterior-posterior to posterior-only approaches over the past two decades.CONCLUSIONSThe data indicate that for patients with SK, surgery affords superior correction and maintenance of correction relative to bracing. Posterior-only fusion may provide greater correction and similar loss of correction compared to anterior-posterior approaches along with a smaller complication profile. This posterior-only approach has concomitantly gained popularity over the combined anterior-posterior approach in recent years.
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Comparison Between Stable Sagittal Vertebra and First Lordotic Vertebra Instrumentation for Prevention of Distal Junctional Kyphosis in Scheuermann Disease: Systematic Review and Meta-analysis. Clin Spine Surg 2019; 32:330-336. [PMID: 30762837 DOI: 10.1097/bsd.0000000000000792] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
STUDY DESIGN This study was a systematic review and meta-analysis. OBJECTIVES To compare stable sagittal vertebra (SSV) and first lordotic vertebra (FLV) instrumentation for prevention of distal junctional kyphosis (DJK) in Scheuermann disease. SUMMARY OF BACKGROUND DATA The SSV has been increasingly chosen as the lowest instrumented vertebra to prevent DJK, and some studies have provided supportive results. However, other studies demonstrate that lowest instrumented vertebra located in the FLV has similar DJK incidence with the benefit of saving levels. MATERIALS AND METHODS Electronic searches of PubMed, Embase, the Cochrane Database, and Web of Science were performed. Radiographic parameters, incidence of DJK, and revision surgery rates were compared between SSV and FLV groups. The odds ratio (OR) was used to identify differences between the groups and P<0.05 was considered statistically significant. RESULTS Four studies with a total of 173 patients were included. There were no differences between the SSV and FLV groups in most radiographic parameters. The incidence of DJK among 173 patients was 20.8% (36/173). The SSV group demonstrated a significantly lower DJK rate than the FLV group (OR, 0.11; 95% confidence interval, 0.04-0.30; P<0.0001; I=39%). In this study, 5.9% (5/85) of the SSV group and 43.6% (24/55) of the FLV group developed DJK; 27.8% (10/36) who developed DJK underwent revision surgery, including 25.0% (6/24) in the FLV group and 40.0% (2/5) in the SSV group. The revision surgery rate was lower in the FLV group than in the SSV group, with no statistical difference (OR, 3.27; 95% confidence interval, 0.26-41.73; P=0.36; I=0%). CONCLUSIONS The overall DJK rate in Scheuermann disease was 20.8%, and 27.8% of DJK patients needed revision surgery. A distal fusion level including the SSV demonstrated a significantly lower DJK rate.
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Zhu W, Sun X, Pan W, Yan H, Liu Z, Qiu Y, Zhu Z. Curve patterns deserve attention when determining the optimal distal fusion level in correction surgery for Scheuermann kyphosis. Spine J 2019; 19:1529-1539. [PMID: 30986575 DOI: 10.1016/j.spinee.2019.04.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 04/08/2019] [Accepted: 04/08/2019] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT The surgical strategy to decide distal fusion level for Scheuermann kyphosis (SK) is controversial. Some spinal surgeons advocate that instrumentation should end at the first lordotic vertebra (FLV), whereas others recommend extending spinal fusion to the sagittal stable vertebra (SSV). Scheuermann kyphosis has two curve patterns: Scheuermann thoracic kyphosis (STK), with the curve apex above or at T10; and Scheuermann thoracolumbar kyphosis (STLK), with the curve apex below T10. To our knowledge, curve patterns have not been taken into consideration when determining the distal fusion level. PURPOSE This study aims to analyze the clinical and radiographic outcomes, including the distal junctional problems, in pediatric patients with STK and STLK who underwent fusion with different distal fusion levels. STUDY DESIGN This is a retrospective, single-center, institutional review board-approved study. PATIENT SAMPLE A total of 45 consecutive pediatric patients with STK or STLK. OUTCOME MEASURES The following parameters were evaluated: global kyphosis (GK), deformity angular ratio (DAR), correction rate of GK and DAR, thoracolumbar kyphosis (TLK), lumbar lordosis (LL), sagittal vertical axis (SVA), T1 pelvic angle (TPA), the distance from the center of the lower instrumented vertebra (LIV) to the posterior sacral vertical line, pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS), and distal junctional kyphosis (DJK). METHODS This work was supported by the National Natural Science Foundation of China (Grant No. 81171672), Nanjing Clinical Medical Center, and Jiangsu Provincial Key Medical Center. Patients with STK were fused to SSV at the distal level (Group STK), whereas patients with STLK were fused to FLV (Group STLK). Whole spine x-rays obtained before surgery, immediately after operation, and at the latest follow-up were evaluated. The radiographic and clinical data were compared between Groups STK and STLK. All patients had a minimum of 2 years of follow-up. RESULTS Before surgery, Groups STK and STLK were comparable in terms of age, gender, body mass index, fusion levels, follow-up time, some radiographic parameters and the 22-item Scoliosis Research Society questionnaire (SRS-22) evaluation. DAR and TLK were significantly smaller, whereas PI was significantly greater, in Group STK than those in Group STLK. Despite different distal fusion strategies, STK and STLK were corrected to an equivalent extent, with similar GK, correction rate, LL, SVA, TPA, PT, and SS immediately after operation and at the final follow-up. The DAR and TLK retained were smaller, whereas the PI retained was greater, in Group STK than STLK after surgery. Distal junctional kyphosis complications were found in five patients with STK curve type. In Group STK, patients with DJK were found to have significantly larger preoperative GK (87.5±7.0 vs. 77.5±9.0, p=.024), correction rate of GK (62.9±10.2% vs. 51.3±8.5%, p=.021), and correction rate of DAR (55.9±4.5% vs. 36.6±13.7%, p=.011) than those without DJK. Pre- and postoperative SRS-22 assessments did not show any significant difference between Groups STK and STLK or between patients with and without DJK. CONCLUSIONS Curve patterns should be taken into attention when determining the optimal distal fusion level in correction surgery for SK. For patients with STLK, relatively shorter fusion stopping at FLV is enough to correct SK with the preservation of more lumbar motility and less development of DJK. For patients with STK, we suggest extending fusion to the SSV, which could restrict more distal junctional problems than fusion to the FLV. Large GK and correction degree might be the associated factors of developing DJK in STK patients.
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Affiliation(s)
- Weiguo Zhu
- Department of Orthopaedic Surgery, Capital Medical University Xuanwu Hospital, Beijing, China; Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Xu Sun
- Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Wei Pan
- Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China; Department of Orthopaedic Surgery, The Affiliated Huai'an Hospital of Xuzhou Medical University, The Second People's Hospital of Huai'an, Huai'an, China
| | - Huang Yan
- Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Zhen Liu
- Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Yong Qiu
- Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Zezhang Zhu
- Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.
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Abstract
Scheuermann's kyphosis (SK) is a rigid structural deformity of the thoracic spine defined radiographically as three or more contiguous vertebrae with at least 5° of wedging anteriorly. Prevalence of the disease is thought to be between 0.4% and 10%. The true cause of SK remains unclear; however, various theories include growth irregularities, mechanical factors, genetic factors, and/or poor bone quality as the causes. Patients with mild disease (less than 70°) generally have a favorable prognosis with good clinical outcomes. Most patients with SK are successfully treated nonsurgically with observation, anti-inflammatory medications, and physical therapy. Surgical intervention is indicated in patients with greater than 70° to 75° thoracic curves, greater than 25° to 30° thoracolumbar curves, intractable pain, neurologic deficit, cardiopulmonary compromise, or poor cosmesis. Because of advances in posterior spinal instrumentation, surgery can typically be performed through a posterior-only approach. When surgical treatment is planned, appropriate selection of the upper- and lower-instrumented vertebrae is important to achieve a well-balanced spine, preserve motion segments, and reduce the risk of junctional kyphosis.
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