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David L Skaggs - One of the best experts on this subject based on the ideXlab platform.
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ten percent of patients with adolescent idiopathic scoliosis have variations in the number of thoracic or lumbar Vertebrae
Journal of Bone and Joint Surgery American Volume, 2013Co-Authors: David A Ibrahim, Karen S Myung, David L SkaggsAbstract:Background: Surveys have demonstrated that wrong-site surgery of the spine is performed by up to 50% of spine surgeons over the course of a career. Inaccurate identification of appropriate Vertebral levels is a common reason for wrong-site spine surgery. The present study examined the prevalence of variations in the number of Vertebrae in patients with adolescent idiopathic scoliosis. Methods: A retrospective review of radiographs and reports of 364 consecutive patients undergoing operative treatment for adolescent idiopathic scoliosis at a single center was performed. The study included eighty-eight male patients (24%) and 276 female patients (76%) with a mean age of fourteen years (range, ten to twenty years). Radiographs were reviewed to assess the number of thoracic and lumbar Vertebrae and the presence of a lumbosacral transitional Vertebra. Results: Ten percent of the patients (thirty-eight) had an atypical number of Vertebrae in the thoracic and/or lumbar spine. Twenty-one patients (5.8%) had an atypical number of thoracic Vertebrae, with fourteen having eleven thoracic Vertebrae and seven patients having thirteen. Twenty-four patients (6.6%) had an atypical number of lumbar Vertebrae, with four having four lumbar Vertebrae and twenty patients having six. A lumbosacral transitional Vertebra was present in 6.3% (twenty-three) of the patients. Multilevel Vertebral anomalies were present in 1.9% of the patients (seven of 364). A variation in the number of Vertebrae had been identified in 0.5% (two) of the reports by the radiologist. Conclusions: Variations in the number of thoracic or lumbar Vertebrae were found in 10% of patients with adolescent idiopathic scoliosis but had been identified in only 0.5% of the radiology reports. Clinical Relevance: Assessment of possible variations in the number of Vertebrae is important to help avoid surgery at the wrong Vertebral level.
Yue Wang - One of the best experts on this subject based on the ideXlab platform.
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is greater lumbar Vertebral bmd associated with more disk degeneration a study using µct and discography
Journal of Bone and Mineral Research, 2011Co-Authors: Yue Wang, Steven K Boyd, Michele C Battie, Yutaka Yasui, Tapio VidemanAbstract:It is well documented that osteoarthritis is associated with greater BMD in peripheral extremities. Yet the relationship between Vertebral BMD and disk degeneration (DD) remains controversial in the lumbar spine, which may be due largely to the inadequacies of BMD and DD measures. Aiming to clarify the association between Vertebral BMD and adjacent DD, we studied 137 cadaveric lumbar Vertebrae and 209 corresponding interVertebral disks from the spines of 48 white men aged 21 to 64 years. DD was evaluated using discography. The Vertebrae were scanned using a micro–computed tomography (µCT) system to obtain volumetric BMD for the whole Vertebra, the Vertebral body, the Vertebral body excluding osteophytes, and the Vertebral body excluding osteophytes and endplates. A random effects model was used to examine the association between the different definitions of Vertebral BMD and adjacent DD. No significant association was found between the BMD of the whole Vertebra and adjacent DD. However, when the posterior elements were excluded, there was a significant association between greater Vertebral body BMD and more severe degeneration in the disk cranial to the Vertebra. This association remained after further excluding osteophytes and endplates from the Vertebral body BMD measurements. Also, a trend of greater BMD of the Vertebral body associated with more adjacent DD was evident. These results clarify the association between Vertebral BMD and DD and specifically indicate that it is higher BMD of the Vertebral body, not the entire Vertebra, that is associated with more severe adjacent DD. This association may be obscured by the posterior elements and is not confounded by osteophytes and endplate sclerosis. © 2011 American Society for Bone and Mineral Research
David A Ibrahim - One of the best experts on this subject based on the ideXlab platform.
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ten percent of patients with adolescent idiopathic scoliosis have variations in the number of thoracic or lumbar Vertebrae
Journal of Bone and Joint Surgery American Volume, 2013Co-Authors: David A Ibrahim, Karen S Myung, David L SkaggsAbstract:Background: Surveys have demonstrated that wrong-site surgery of the spine is performed by up to 50% of spine surgeons over the course of a career. Inaccurate identification of appropriate Vertebral levels is a common reason for wrong-site spine surgery. The present study examined the prevalence of variations in the number of Vertebrae in patients with adolescent idiopathic scoliosis. Methods: A retrospective review of radiographs and reports of 364 consecutive patients undergoing operative treatment for adolescent idiopathic scoliosis at a single center was performed. The study included eighty-eight male patients (24%) and 276 female patients (76%) with a mean age of fourteen years (range, ten to twenty years). Radiographs were reviewed to assess the number of thoracic and lumbar Vertebrae and the presence of a lumbosacral transitional Vertebra. Results: Ten percent of the patients (thirty-eight) had an atypical number of Vertebrae in the thoracic and/or lumbar spine. Twenty-one patients (5.8%) had an atypical number of thoracic Vertebrae, with fourteen having eleven thoracic Vertebrae and seven patients having thirteen. Twenty-four patients (6.6%) had an atypical number of lumbar Vertebrae, with four having four lumbar Vertebrae and twenty patients having six. A lumbosacral transitional Vertebra was present in 6.3% (twenty-three) of the patients. Multilevel Vertebral anomalies were present in 1.9% of the patients (seven of 364). A variation in the number of Vertebrae had been identified in 0.5% (two) of the reports by the radiologist. Conclusions: Variations in the number of thoracic or lumbar Vertebrae were found in 10% of patients with adolescent idiopathic scoliosis but had been identified in only 0.5% of the radiology reports. Clinical Relevance: Assessment of possible variations in the number of Vertebrae is important to help avoid surgery at the wrong Vertebral level.
Tapio Videman - One of the best experts on this subject based on the ideXlab platform.
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is greater lumbar Vertebral bmd associated with more disk degeneration a study using µct and discography
Journal of Bone and Mineral Research, 2011Co-Authors: Yue Wang, Steven K Boyd, Michele C Battie, Yutaka Yasui, Tapio VidemanAbstract:It is well documented that osteoarthritis is associated with greater BMD in peripheral extremities. Yet the relationship between Vertebral BMD and disk degeneration (DD) remains controversial in the lumbar spine, which may be due largely to the inadequacies of BMD and DD measures. Aiming to clarify the association between Vertebral BMD and adjacent DD, we studied 137 cadaveric lumbar Vertebrae and 209 corresponding interVertebral disks from the spines of 48 white men aged 21 to 64 years. DD was evaluated using discography. The Vertebrae were scanned using a micro–computed tomography (µCT) system to obtain volumetric BMD for the whole Vertebra, the Vertebral body, the Vertebral body excluding osteophytes, and the Vertebral body excluding osteophytes and endplates. A random effects model was used to examine the association between the different definitions of Vertebral BMD and adjacent DD. No significant association was found between the BMD of the whole Vertebra and adjacent DD. However, when the posterior elements were excluded, there was a significant association between greater Vertebral body BMD and more severe degeneration in the disk cranial to the Vertebra. This association remained after further excluding osteophytes and endplates from the Vertebral body BMD measurements. Also, a trend of greater BMD of the Vertebral body associated with more adjacent DD was evident. These results clarify the association between Vertebral BMD and DD and specifically indicate that it is higher BMD of the Vertebral body, not the entire Vertebra, that is associated with more severe adjacent DD. This association may be obscured by the posterior elements and is not confounded by osteophytes and endplate sclerosis. © 2011 American Society for Bone and Mineral Research
Tom Hansen - One of the best experts on this subject based on the ideXlab platform.
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Vertebral deformities in triploid atlantic salmon salmo salar l underyearling smolts
Aquaculture, 2010Co-Authors: Per Gunnar Fjelldal, Tom HansenAbstract:Abstract This study investigated the prevalence of Vertebral deformities in triploid and diploid Atlantic salmon smolts. Four full-sibling families were either subjected to hydrostatic pressure (655 bar, 6.25 min, 8 °C) (triploid) 37 min post-fertilization, or were maintained as untreated controls (diploid), and then reared to the smolt stage. Some 800 fish (100 per ploidy/family group) were palpated for Vertebral deformities, and 480 (60 per ploidy/family group) of these were selected at random for radiography and evaluation for Vertebral deformities. There was a significantly higher prevalence of triploid individuals classified as spinally deformed during palpation (triploids; 1–3%, diploids; 0–1%), and of individuals with one or more deformed Vertebrae on radiographs (triploids; 30–35%, diploids; 8–13%). The trunk region (V9-30) of the Vertebral column was the predominant location for deformities in triploids, with Vertebra number 24 being the most often affected. Of the triploids, 7.6% had a malformation in this particular Vertebra, which is located beneath the dorsal fin.
