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Concepción-González A, Sarmiento JM, Rymond CC, Ezeh C, Sinha R, Lin H, Lu K, Boby AZ, Gorroochurn P, Larson AN, Roye BD, Ilharreborde B, Vitale MG. Evaluating compliance with the best practice guidelines for wrong-level surgery prevention in high-risk pediatric spine surgery. Spine Deform 2024; 12:923-932. [PMID: 38512566 DOI: 10.1007/s43390-024-00836-9] [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: 09/23/2023] [Accepted: 02/01/2024] [Indexed: 03/23/2024]
Abstract
PURPOSE In 2018, Best Practice Guidelines (BPGs) were published for preventing wrong-level surgery in pediatric spinal deformity, but successful implementation has not been established. The purpose of this study was to evaluate BPG compliance 5 years after publication. We hypothesized higher compliance among BPG authors and among surgeons with more experience, higher caseload, and awareness of the BPGs. METHODS We queried North American and European surgeons, authors and nonauthors, and members of pediatric spinal study groups on adherence to BPGs using an anonymous survey consisting of 18 Likert scale questions. Respondents provided years in practice, yearly caseload, and guideline awareness. Mean compliance scores (MCS) were developed by correlating Likert responses with MCS scores ("None of the time" = no compliance = MCS 0, "Sometimes" = weak to moderate = MCS 1, "Most of the time" = high = MCS 2, and "All the time" = perfect = MCS 3). RESULTS Of the 134 respondents, 81.5% reported high or perfect compliance. Average MCS for all guidelines was 2.4 ± 0.4. North American and European surgeons showed no compliance differences (2.4 vs. 2.3, p = 0.07). Authors and nonauthors showed significantly different compliance scores (2.8 vs 2.4, p < 0.001), as did surgeons with and without knowledge of the BPGs (2.5 vs 2.2, p < 0.001). BPG awareness and compliance showed a moderate positive correlation (r = 0.48, p < 0.001), with non-significant associations between compliance and both years in practice (r = 0.41, p = 0.64) and yearly caseload (r = 0.02, p = 0.87). CONCLUSION Surgeons reported high or perfect compliance 81.5% of the time with BPGs for preventing wrong-level surgery. Authorship and BPG awareness showed increased compliance. Location, study group membership, years in practice, and yearly caseload did not affect compliance. LEVEL OF EVIDENCE Level V-expert opinion.
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Affiliation(s)
- Alondra Concepción-González
- Department of Orthopedic Surgery, Columbia University Irving Medical Center, New York, NY, 10032, USA.
- Department of Orthopaedic Surgery, Morgan Stanley Children's Hospital of New York Presbyterian, Columbia University Irving Medical Center, ATTN: Alondra Concepción-González, 3959 Broadway, CHONY 8-N, New York, NY, 10032-3784, USA.
| | - J Manuel Sarmiento
- Department of Orthopedic Surgery, Columbia University Irving Medical Center, New York, NY, 10032, USA
- Division of Pediatric Orthopaedic Surgery, New York-Presbyterian Morgan Stanley Children's Hospital, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Christina C Rymond
- Department of Orthopedic Surgery, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Chinenye Ezeh
- Division of Pediatric Orthopaedic Surgery, New York-Presbyterian Morgan Stanley Children's Hospital, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Rishi Sinha
- David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA
| | - Hannah Lin
- Department of Orthopedic Surgery, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Kevin Lu
- Department of Orthopedic Surgery, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Afrain Z Boby
- Department of Orthopedic Surgery, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | | | - A Noelle Larson
- Division of Pediatric Orthopaedic Surgery, Mayo Clinic, Rochester, MN, 55902, USA
| | - Benjamin D Roye
- Department of Orthopedic Surgery, Columbia University Irving Medical Center, New York, NY, 10032, USA
- Division of Pediatric Orthopaedic Surgery, New York-Presbyterian Morgan Stanley Children's Hospital, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Brice Ilharreborde
- Pediatric Orthopaedic Department, Robert Debré Hospital, APHP, Cité University, Paris, Paris, France
| | - Michael G Vitale
- Department of Orthopedic Surgery, Columbia University Irving Medical Center, New York, NY, 10032, USA
- Division of Pediatric Orthopaedic Surgery, New York-Presbyterian Morgan Stanley Children's Hospital, Columbia University Irving Medical Center, New York, NY, 10032, USA
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Chiu CK, Chin TF, Chung WH, Chan CYW, Kwan MK. Variations in the Number of Vertebrae, Prevalence of Lumbosacral Transitional Vertebra and Prevalence of Cervical Rib Among Surgical Patients With Adolescent Idiopathic Scoliosis: An Analysis of 998 Radiographs. Spine (Phila Pa 1976) 2024; 49:64-70. [PMID: 37146062 DOI: 10.1097/brs.0000000000004711] [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] [Received: 01/04/2023] [Accepted: 04/27/2023] [Indexed: 05/07/2023]
Abstract
STUDY DESIGN Retrospective Study. OBJECTIVE This study aims to investigate variation in the number of thoracic and lumbar vertebrae, the prevalence of lumbosacral transitional vertebra (LSTV) and the prevalence of cervical ribs among surgical patients with adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND DATA Due to variation in the number of thoracic or lumbar vertebrae, inaccurate identification of vertebral levels has been found to be a contributory factor to wrong-level surgery. METHODS This was a retrospective study on AIS patients who underwent posterior spinal fusion. Demographic and anthropometric data (age, gender, height, weight, and body mass index), radiographic data (Lenke curve type, pre-operative Cobb angle, vertebra numbering of cervical, thoracic, and lumbar spine, presence of LSTV based on the Castellvi classification and the presence of cervical ribs) and clinical data were collected. Data were analysed and reported with mean and standard deviation for quantitative parameters and number and percentage for qualitative parameters. Multinomial logistic regression analyses were performed to identify factors associated with the outcomes of interest. RESULTS A total of 998 patients met inclusion criteria, of which 135 (13.5%) were males and 863 (86.5%) were females. The vertebrae number varied between 23 to 25 total vertebrae with 24 vertebrae considered as the typical number of vertebrae. The prevalence of atypical number of vertebrae (23 or 25) was 9.8% (98 patients). We found a total of 7 different variations in number of cervical, thoracic, and lumbar vertebrae (7C11T5L, 7C12T4L, 7C11T6L, 7C12T5L, 7C13T4L, 7C12T6L, and 7C13T5L) with 7C12T5L considered as the typical vertebrae variation. The total prevalence of patients with atypical vertebrae variation was 15.5% (155 patients). Cervical ribs were found in 2 (0.2%) patients while LSTV were found in 250 (25.1%) of patients. The odds of 13 thoracic vertebrae were higher in males (OR 5.17; 95% CI: 1.25, 21.39) and the odds of 6 lumbar vertebrae were higher in LSTV (OR 3.93; 95% CI: 2.58, 6.00). CONCLUSION In this series, we identified a total of 7 different variations in the number of cervical, thoracic, and lumbar vertebrae. The total prevalence of patients with atypical vertebrae variation was 15.5%. LSTV was found in 25.1% of the cohort. It is important to ascertain atypical vertebrae variations rather than the absolute number of vertebrae because variants such as 7C11T6L and 7C13T4L may still have typical numbers of vertebrae in total. However, due to the differences in the number of morphologically thoracic and lumbar vetrebrae, there may still be a risk of inaccurate identification.
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Affiliation(s)
- Chee Kidd Chiu
- Department of Orthopaedic Surgery (NOCERAL), Faculty of Medicine, Universiti Malaya, Kuala Lumpur
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Schmitz A, Reutershahn E, Seiffert P, Das M. First description of frequent occurrence of supernumerary lumbar ribs and transitional vertebrae in children with Williams-Beuren syndrome. Pediatr Radiol 2023; 53:244-248. [PMID: 36044052 DOI: 10.1007/s00247-022-05493-6] [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: 06/06/2022] [Revised: 07/05/2022] [Accepted: 08/22/2022] [Indexed: 02/04/2023]
Abstract
BACKGROUND Williams-Beuren syndrome is a rare multisystemic genetic disorder with an incidence of 1 in 7,500 live births. Because these children often have scoliosis, they undergo routine radiographic examinations of the spine. During these examinations we have found many children with supernumerary lumbar ribs arising from the first lumbar vertebra, often associated with lumbosacral transitional vertebrae. OBJECTIVE To describe the incidence of supernumerary ribs and transitional vertebrae in children with Williams-Beuren syndrome and compare it to the incidence in a general population. Our hypothesis is that these findings are common, but they have not been described in the literature concerning Williams-Beuren syndrome. MATERIALS AND METHODS From January 2015 to October 2021, 308 patients (138 male) with Williams-Beuren syndrome were treated at our hospital. Of these, 106 (47 male) underwent diagnostic imaging, mostly for suspected scoliosis. Panoramic radiographs of the whole spine were performed in 88 patients and radiographs of regions of the spine, chest radiographs, CT, MRI or fluoroscopy in 18 patients. We retrospectively analysed the images concerning the number of ribs and vertebrae. We correlated the frequency of lumbar ribs and transitional vertebrae in comparison to a general population as described in the literature. RESULTS After exclusions for insufficient imaging, we analysed imaging in 91 patients. Of these, 67 patients (73.6%) had 13 ribs, of which 85% were located on both sides, 9% on the right and 6% on the left side. Of the 67 patients with supernumerary lumbar ribs, 38 (57%) also had transitional vertebrae. CONCLUSION Supernumerary lumbar ribs arising from the first lumbar vertebra, often accompanied by lumbosacral transitional vertebrae, are common in children with Williams-Beuren syndrome.
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Affiliation(s)
- Annette Schmitz
- Klinik für Diagnostische und Interventionelle Radiologie, Helios Klinikum Duisburg, Dieselstraße 185, 47166, Duisburg, Germany.
| | - Elke Reutershahn
- Klinik für Kinder und Jugendliche/Perinatalzentrum, Helios Klinikum Duisburg, Dieselstraße 185, 47166, Duisburg, Germany
| | - Peter Seiffert
- Klinik für Kinder und Jugendliche/Perinatalzentrum, Helios Klinikum Duisburg, Dieselstraße 185, 47166, Duisburg, Germany
| | - Marco Das
- Klinik für Diagnostische und Interventionelle Radiologie, Helios Klinikum Duisburg, Dieselstraße 185, 47166, Duisburg, Germany
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Hashmi SS, Seifert KD, Massoud TF. Thoracic and Lumbosacral Spine Anatomy. Neuroimaging Clin N Am 2022; 32:889-902. [DOI: 10.1016/j.nic.2022.07.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Garg B, Mehta N, Goyal A, Rangaswamy N, Upadhayay A. Variations in the Number of Thoracic and Lumbar Vertebrae in Patients With Adolescent Idiopathic Scoliosis: A Retrospective, Observational Study. Int J Spine Surg 2021; 15:359-367. [PMID: 33900995 DOI: 10.14444/8047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Abnormal anatomy is a contributory factor to wrong-level surgery. Variations in the number of vertebrae in populations from different races and geographical regions have been described. A ∼10% prevalence of variations in number of thoracic and lumbar vertebrae in adolescent idiopathic scoliosis (AIS) patients has been previously reported. The objectives of present study were (i) to find out the prevalence of variations in the number of thoracic and lumbar vertebrae and the presence of lumbosacral transitional vertebrae (LSTV) in Indian AIS patients and (ii) to correlate these variations with gender and type of curve. METHODS Hospital records and imaging of 198 AIS patients were reviewed retrospectively. A standardized numbering strategy was used to identify the number of thoracic vertebrae, number of lumbar vertebrae, and presence of LSTV. Patients' gender and curve type were correlated with the presence of an abnormal number of thoracic or lumbar vertebrae. Radiology reports and operation notes were reviewed to find out instances when the radiologist or surgeon had identified an abnormal number of vertebrae. RESULTS Forty patients (20.2%) with abnormally numbered thoracic or lumbar vertebrae were identified. Twenty patients (10.1%) had abnormally numbered thoracic vertebrae, and 33 patients (16.7%) had abnormally numbered lumbar vertebrae. The prevalence of LSTV was 18.2%. Presence of variations did not correlate with gender or curve type. Radiology reports identified 2/40 patients with variations, whereas operation notes showed 4/40 patients had been correctly identified to have abnormally numbered vertebrae. CONCLUSIONS There is high prevalence of variation in the number of thoracic or lumbar vertebrae in AIS patients, with most of those missed being identified by radiologists or surgeons. The patient's preoperative imaging must be scrutinized to identify these patients and take the variation into account to avoid wrong selection of fusion levels. LEVEL OF EVIDENCE 3. CLINICAL RELEVANCE Text. The study raises awareness about possibility of wrong selection in fusion levels due to anatomical variations in surgery for AIS.
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Affiliation(s)
- Bhavuk Garg
- Department of Orthopaedics, All India Institute of Medical Sciences, New Delhi, India
| | - Nishank Mehta
- Department of Orthopaedics, All India Institute of Medical Sciences, New Delhi, India
| | - Archit Goyal
- Department of Orthopaedics, All India Institute of Medical Sciences, New Delhi, India
| | - Namith Rangaswamy
- Department of Orthopaedics, All India Institute of Medical Sciences, New Delhi, India
| | - Arpan Upadhayay
- Department of Orthopaedics, All India Institute of Medical Sciences, New Delhi, India
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Hou L, Bai X, Li H, Gao T, Li W, Wen T, He Q, Ruan D, Shi L, Bing W. Lumbar plain radiograph is not reliable to identify lumbosacral transitional vertebra types according to Castellvi classification principle. BMC Musculoskelet Disord 2020; 21:333. [PMID: 32471475 PMCID: PMC7260820 DOI: 10.1186/s12891-020-03358-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 05/20/2020] [Indexed: 11/11/2022] Open
Abstract
Background The anteroposterior view of the lumbar plain radiograph (AP-LPR) was chosen as the original and first radiographic tool to determine and classify lumbosacral transitional vertebra with morphological abnormality (MA-LSTV) according to the Castellvi classification. However, recent studies found that AP-LPR might not be sufficient to detect or classify MA-LSTV correctly. The present study aims to verify the reliability of AP-LPR on detecting and classifying MA-LSTV types, taking coronal reconstructed CT images (CT-CRIs) as the gold criteria. Methods Patients with suspected MA-LSTVs determined by AP-LPR were initially enrolled. Among them, those who received CT-CRIs were formally enrolled to verify the sensitivity of AP-LPR on detecting and classifying MA-LSTV types according to the Castellvi classification principle. Results A total of 298 cases were initially enrolled as suspected MA-LSTV, among which 91 cases who received CT-CRIs were enrolled into the final study group. All suspected MA-LSTVs were verified to be real MA-LSTVs by CT-CRIs. However, 35.2% of the suspected MA-LSTV types judged by AP-LPR were not consistent with the final types judged by CT-CRIs. Two suspected type IIIa and 20 suspected type IIIb MA-LSTVs were verified to be true, while 9 of 39 suspected type IIa, 9 and 3 of 17 suspected type IIb, and 11 of 13 suspected type IV MA-LSTVs were verified to truly be type IIIa, IIIb, IV and IIIb MA-LSTVs by CT-CRIs, respectively. Incomplete joint-like structure (JLS) or bony union structure (BUS) and remnants of sclerotic band (RSB) between the transverse process (TP) and sacrum were considered to be the main reasons for misclassification. Conclusion Although AP-LPR could correctly detect MA-LSTV, it could not give accurate type classification. CT-CRIs could provide detailed information between the TP and sacrum area and could be taken as the gold standard to detect and classify MA-LSTV.
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Affiliation(s)
- Lisheng Hou
- Department of Orthopedic Surgery, the sixth Medical Center of PLA Army General Hospital, NO.6 Fucheng Road, Beijing, 100048, China.
| | - Xuedong Bai
- Department of Orthopedic Surgery, the sixth Medical Center of PLA Army General Hospital, NO.6 Fucheng Road, Beijing, 100048, China
| | - Haifeng Li
- Department of Orthopedic Surgery, the sixth Medical Center of PLA Army General Hospital, NO.6 Fucheng Road, Beijing, 100048, China
| | - Tianjun Gao
- Department of Orthopedic Surgery, the sixth Medical Center of PLA Army General Hospital, NO.6 Fucheng Road, Beijing, 100048, China
| | - Wei Li
- Department of Orthopedic Surgery, the sixth Medical Center of PLA Army General Hospital, NO.6 Fucheng Road, Beijing, 100048, China
| | - Tianyong Wen
- Department of Orthopedic Surgery, the sixth Medical Center of PLA Army General Hospital, NO.6 Fucheng Road, Beijing, 100048, China
| | - Qing He
- Department of Orthopedic Surgery, the sixth Medical Center of PLA Army General Hospital, NO.6 Fucheng Road, Beijing, 100048, China
| | - Dike Ruan
- Department of Orthopedic Surgery, the sixth Medical Center of PLA Army General Hospital, NO.6 Fucheng Road, Beijing, 100048, China
| | - Lijing Shi
- Department of Radiology, The sixth Medical Center of PLA Army General Hospital, Beijing, China
| | - Wei Bing
- Department of Computer Center, The sixth Medical Center of PLA Army General Hospital, Beijing, China
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Abstract
STUDY DESIGN Anatomical study. OBJECTIVES This study was conducted to determine the prevalence of abnormal lumbar vertebrae (4 and 6) and note any differences in pelvic incidence (PI) between spines with 4, 5, and 6 lumbar vertebrae. METHODS We screened 2980 dry cadaveric specimens from an osteological collection. Pelvises were reconstructed by articulating the sacra and innominate bones. PI was measured in all specimens via lateral photographs. L6-pelvic incidence (L6PI) was also measured, by articulating L6 to the sacrum and measuring PI from the superior aspect of the L6 vertebral body. RESULTS Of the specimens screened, 969 specimens were evaluated. Average age of death for all specimens was 50.4 ± 15.4 years. The prevalence of 6 lumbar vertebrae was 0.8% (n = 23), and the prevalence of 4 lumbar vertebrae was 1.8% (n = 54). PI measured 38.5° in specimens with 4 lumbar vertebrae, and 46.7° and 47.1° in specimens with 5 and 6 lumbar vertebrae, respectively. PI was significantly different between specimens with 4 and 5 lumbar vertebrae (P < .001) but not between specimens with 5 and 6 lumbar vertebrae (P = .38). For specimens with 6 lumbar vertebrae, when L6 was added to the sacrum, mean L6PI was 27.4°. CONCLUSIONS In our large cadaveric study of full spines, we reported a lower prevalence of spines with 4 and 6 lumbar vertebrae compared to previous studies. PI was significantly decreased in subjects with 4 lumbar vertebrae compared with those with normal spines, and special caution should be taken when managing sagittal balance in these patients.
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Affiliation(s)
- Matthew V. Abola
- Case Western Reserve University, Cleveland, OH, USA,Matthew V. Abola, Case Western Reserve
University School of Medicine, 10900 Euclid Avenue, Cleveland, OH 44106-4920,
USA.
| | | | | | - Jennifer M. Bauer
- Seattle Children’s Hospital, University of Washington, Seattle, WA,
USA
| | - Raymond W. Liu
- Rainbow Babies and Children’s Hospital at Case Western Reserve
University, Cleveland, OH, USA
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Interpretation of Spinal Radiographic Parameters in Patients With Transitional Lumbosacral Vertebrae. Spine Deform 2019; 6:587-592. [PMID: 30122395 DOI: 10.1016/j.jspd.2018.01.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 11/10/2017] [Accepted: 01/12/2018] [Indexed: 01/30/2023]
Abstract
STUDY DESIGN Retrospective radiographic review. OBJECTIVES To understand the effect of variability in sacral endplate selection in transitional lumbosacral vertebrae (TLSV) and its impact on pelvic, regional, and global spinal alignment parameters. BACKGROUND TLSV can have the characteristics of both lumbar and sacral vertebrae. Difficulties in identification of the S1 endplate may come from nomenclature, number of lumbar vertebrae, sacra, and morphology and may influence the interpretation and consistency of spinal alignment parameters. METHODS Patients with TLSV were identified and radiographic measurements including pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS), lumbar lordosis (LL), sagittal vertical axis (SVA), T1-pelvic angle (TPA), pelvic incidence-lumbar lordosis (PI-LL) mismatch, thoracic kyphosis (TK), and spinal inclination (T1SPi) were obtained. Radiographic measurements were performed twice with the sacral endplate at the cephalad and caudal options. Paired t tests assessed the difference between different selection groups. RESULTS Of 1,869 patients, 70 (3.7%) were found to have TLSV on radiographic imaging. Fifty-eight (82.9%) had lumbarized sacral segments whereas 12 (17.1%) had sacralized lumbar segments. T1-SPi (mean: -1.77°) and TK (mean: 34.86°) did not vary from altering sacral endplate selection. Selection of the caudal TLSV as the sacral endplate resulted in an increase in all pelvic parameters (PI: 66.8° vs. 44.3°, PT: 25.1° vs. 12.7°, and SS: 41.6° vs. 31.6°), regional lumbar parameters (LL: -54.1° vs. 44.0°, PI-LL: 12.7° vs. 0.3°), and global parameters (SVA: 46.1 mm vs. 28.3 mm, TPA: 23.3° vs. 10.8°) as compared to selecting the cephalad TLSV. All mean differences between radiographic parameters were found to be statistically significant (p < .001). CONCLUSIONS Variation in sacral endplate selection in TLSV significantly affects spinal alignment parameter measurements. A standardized method for measuring TLSV is needed to reduce measurement error and ultimately allow more accurate understanding of alignment targets in patients with TLSV. LEVEL OF EVIDENCE Level III.
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Tague RG. Proximate cause, anatomical correlates, and obstetrical implication of a supernumerary lumbar vertebra in humans. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2017; 165:444-456. [PMID: 29159938 DOI: 10.1002/ajpa.23361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 10/28/2017] [Accepted: 10/30/2017] [Indexed: 12/12/2022]
Abstract
OBJECTIVES Three issues are considered on variation in number of presacral vertebrae (PSV) in humans: (1) sexual difference in number of PSV, (2) inactivation of Hoxd-11 gene as etiology for a supernumerary lumbar vertebra, and (3) anatomical correlates of a supernumerary lumbar vertebra, including lumbar-sacral nearthrosis, and pelvic size. MATERIALS AND METHODS Sample was 407 skeletonized females and 1,318 males from United States; ages at death were 20 to 49 years. Two subsamples of males were used: (1) 98 with modal numbers of cervical, thoracic, lumbar, and sacral vertebrae (PSV = 24) and (2) 45 with a supernumerary lumbar vertebra but modal numbers for other vertebral segments (PSV = 25). Measurements were taken of ulna, second metacarpal, vertebrae, femur, and pelvis; presence of lumbar-sacral nearthrosis was observed. RESULTS Although 90% of females and males have 24 PSV, females have higher frequency of 23 PSV and males have higher frequency of 25 PSV. Compared to males with 24 PSV, males with 25 PSV and supernumerary lumbar vertebra show (1) no difference in anatomies associated with inactivation of Hoxd-11, and (2) higher frequency of lumbar-sacral nearthrosis and smaller pelvic inlet circumference. DISCUSSION Sexual difference in number of PSV may be due to tempo of somite formation and Hox gene activation. Hypothesis is not supported that a supernumerary lumbar vertebra is due to inactivation of Hoxd-11. The presence of a supernumerary lumbar vertebra is associated with small pelvic inlet circumference, which can be obstetrically disadvantageous.
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Affiliation(s)
- Robert G Tague
- Department of Geography and Anthropology, Louisiana State University, Baton Rouge, Louisiana, 70803
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Liu Z, Hu ZS, Qiu Y, Zhang Z, Zhao ZH, Han X, Zhu ZZ. Role of Clavicle Chest Cage Angle Difference in Predicting Postoperative Shoulder Balance in Lenke 5C Adolescent Idiopathic Scoliosis Patients after Selective Posterior Fusion. Orthop Surg 2017; 9:86-90. [PMID: 28276642 DOI: 10.1111/os.12305] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Accepted: 11/13/2016] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE To evaluate the role of preoperative clavicle chest cage angle difference (CCAD) on postoperative radiographic shoulder imbalance, patient's satisfaction and surgeon's fulfillment in Lenke 5 adolescent idiopathic scoliosis (AIS). CCAD, as a novel radiographic parameter, has proven to be a reliable predictor for postoperative shoulder imbalance in Lenke 1 AIS patients. However, the value of CCAD in predicting shoulder balance has never been evaluated in Lenke 5 AIS patients. METHODS A total of 42 Lenke 5C AIS patients aged from 10 to 18 years old with a minimum 2-year follow-up were enrolled for evaluation. All patients underwent selective posterior spinal instrumentation and fusion using the all segmental pedicle screw technique by the same surgical team. The fusion levels were determined according to the Lenke criteria. Shoulder height difference (SHD) and CCAD were measured on anteroposterior (AP) standing radiographs. The patients' satisfaction and the surgeons' fulfillment were evaluated using a questionnaire. A receiver operative characteristic curve analysis was performed to explore the threshold values of preoperative CCAD in the prediction of the final follow-up radiographic shoulder imbalance, patients' satisfaction and surgeons' fulfillment. RESULTS The average preoperative Cobb angle of the main curve was 46.8° ± 4.8°, and the average immediate postoperative Cobb angle was 13.3° ± 2.6°, representing an average surgical correction rate of 75.6% ± 8.5%. The average follow-up time was 29.2 months. At the last follow-up, the value of preoperative CCAD was significantly higher in patients with unbalanced shoulders (SHD ≥ 10 mm). At the final follow-up, 66.7% (28/42) of the patients were satisfied with their appearance, while 33.3% (14/42) of the patients were not satisfied with their appearance. At the final follow-up, 61.9% (26/42) of the surgeons were fulfilled with their operation, while 38.1% (16/42) of the surgeons were not. For patients' satisfaction and surgeons' fulfillment, the preoperative CCAD was significantly greater in patients with unsatisfied outcomes. DISCUSSION Clavicle chest cage angle difference could be a reliable predictor for evaluating postoperative shoulder imbalance in AIS patients undergoing selective posterior fusion for Lenke 5C curves. A greater preoperative CCAD was significantly correlated with a postoperative radiographic imbalance of shoulders and dissatisfaction, which will guide spine surgeons in their preoperative planning and in the surgical management of AIS to reduce postoperative shoulder imbalance.
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Affiliation(s)
- Zhen Liu
- The Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Zong-Shan Hu
- The Joint Scoliosis Research Center of the Chinese University of Hong Kong & Nanjing University, The Chinese University of Hong Kong, Hong Kong, China
| | - Yong Qiu
- The Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Zhen Zhang
- The Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Zhi-Hui Zhao
- The Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Xiao Han
- The Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Ze-Zhang Zhu
- The Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
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