Introduction: Although taught everywhere and in textbooks as a common fracture condition in orthopedics, plastic deformation of the lower extremities in pediatrics has been exceedingly rarely reported. Case Report: We present unambiguous documentation of a case of a 9-year-old female who sustained an isolated plastic deformation of the tibia and fibula. The diagnosis and treatment course are described, with emphasis on this documentation with serendipitous full-length leg radiographs obtained before and images obtained after injury that demonstrate the plastic deformation pattern. Conclusion: This case provides novel and unambiguous documentation of plastic deformation of the tibia for the medical literature given its rarity in the pediatric orthopedic population. This case presentation provides valuable radiographic documentation.

Background: The prevalence of major coronal and sagittal spinal curves (scoliosis and kyphosis) in Turner syndrome (TS) is not well established due to limited reporting. The relationship between growth hormone (GH) therapy and its effect on TS spinal curve incidence is also not well established. Methods: A retrospective chart review of 306 TS patients from 2007 to 2021 evaluated major coronal and sagittal spinal curves, progression of the curve, and treatment with GH. Statistical significance (defined as P <0.05) between curvature rates and curve progression was compared between GH-treated patients and non–GH-treated patients using a χ 2 or Fisher exact test when appropriate. Results: Thirty-seven of 306 (12%) TS patients had a radiographically relevant spinal deformity. Twenty-seven of 37 (73%) had mild; 4 of 37 (11%) had moderate, and 6 of 37 (16%) had severe curves. Of those with severe, 4 underwent spinal fusion, 1 was treated with bracing, and 1 was braced before a cardiovascular-related death. Regarding GH use among TS patients, 190 of 306 (62%) used GH versus 116 of 306 (38%) who did not. Of those with a spinal curve, 24 of 37 (65%) used GH compared with 13 of 37 (35%) who did not. On univariate analysis, GH therapy was not a risk factor for the diagnosis of a major spinal curve, a more severe degree of the curve at the time of diagnosis, or spinal curve progression ( P >0.05 for all). Conclusions: This is the largest single institution retrospective review of a TS cohort known to the authors assessing spinal curve prevalence and relation to GH treatment and demonstrates a TS spinal curve rate of 12% (37/306). Four of six (11%) TS patients with a severe curve underwent corrective spine fusion. There was no relationship between the use of GH and the presence of a spinal curve or curve progression. Further study is warranted to determine risk factors for curve progression. Level of Evidence: Level III. Clinical Relevance: This retrospective case series serves to review and address the prevalence of spinal deformity in TS patients and whether GH impacts worsening deformity.

Aims and objectives:The prevalence and treatment of severe scoliosis and other spinal anomalies in patients with Turner's syndrome (TS) is not well reported. This is the largest case series to date regarding the treatment course and outcomes of severely scoliotic TS patients. Methods:A retrospective chart review was performed to identify all patients with TS seen at a single center academic pediatric institution from 2007 to 2021. Of these, the presence of concomitant severe scoliosis or other spinal anomalies was determined, defined by a major coronal curve measuring 45° or greater. Demographic, clinical, surgical, and radiologic data was collected at both pre- and post-intervention time points. Results:A retrospective chart review identified 306 patients with TS. Of those, six were identified to have severe scoliosis or other severe spinal anomalies requiring fusion. All four posterior spinal fusion (PSF) patients demonstrated improvement of their spinal curvature. One patient who electively pursued only bracing demonstrated minimal improvement and surgery was subsequently recommended, but not pursued. One patient expired from a pre-existing heart condition prior to intervention. All postoperative complications resolved with no further complications. The only brace-related complication was an allergic rash related to the brace material. Conclusion:All four patients who underwent PSF demonstrated significant improvement of their spinal curvature with few post-surgical complications. None of the patients in the bracing cohort demonstrated stabilization of their spinal curvature. Therefore, these data corroborate with prior studies, suggesting that operative management consisting of spinal fusion with instrumentation provides optimal clinical outcomes, compared to bracing only.

Predicting pediatric spinal deformity (PSD) from X-ray images collected on the patient’s initial visit is a challenging task. This work builds on our previous method and provides a novel bio-informed framework based on a mechanistic machine learning technique with dynamic patient-specific parameters to predict PSD. We provide a geometry-based bone growth model that can be utilized in a range of applications to enhance the bio-informed mechanistic machine learning framework. The proposed technique is utilized to examine and predict spine curvature in PSD cases such as adolescent idiopathic scoliosis. The best fit of a segmented 3D volumetric geometry of the human spine acquired from 2D X-ray images is employed. Using an active contour model based on gradient vector flow snakes, the anteroposterior and lateral views of the X-ray images are segmented to derive the 2D contours surrounding each vertebra. Using minimal user input, the snake parameters are calibrated and automatically computed over the dataset, resulting in fast image segmentation and data collection. The 2D segmented outlines of each vertebra are transformed into a 3D image segmentation result. The Iterative Closest Point mesh registration technique is then used to establish a mesh morphing approach and creates a 3D atlas spine model. Using the comprehensive 3D volumetric model, one can automatically extract spinal geometry data as inputs to the mechanistic machine learning network. Moreover, the proposed bio-informed deep learning network with the modified bone growth model achieves competitive or even superior performance against other state-of-the-art learning-based methods.Please check and confirm if the author names and initials are correct for “Yongjie Jessica Zhang” and “Wing Kam Liu”.We confirm they are correct.

Idiopathic Scoliosis (IS) is a relatively common condition and is estimated to affect as many as 3 % of youth aged 10-17 years (in the United States an estimated approximately 1.4 million otherwise healthy individuals). A clear understanding of the etiology will better direct optimization of evaluation, treatments and therapies, especially early treatments with less invasive methods. A mechanistic explanation of factors combining to initiate and then cause progression of this common condition-- in otherwise healthy pre-teenage and teenage patients--will be discussed. A recent well-designed structured systematic review states that 'strong evidence is lacking for a consistent pattern of occurrence and any abnormality', in other words there is no strong evidence for 'other associated diagnoses' in IS. And so, certain important inherent factors of IS merit greater discussion. Inherent, or intrinsic factors include: a natural susceptibility to develop a lateral and rotational deformity in the immature rapidly growing erect human spine, inherent torsion associated at the induction of deformity, biomechanics related to curve progression, and anthropology/bipedal gait. We know more today about factors related to the condition and its etiology than we have previously. Across multiple disciplines, a mechanistic approach to understanding the etiopathogenesis of IS, allows a reasonable 'theory' for IS etiology and its progression. We will discuss these inherent intrinsic factors in order to further add to our understanding of the theoretical etiopathogenesis. A better understanding of the etiology (and progression) may better direct ways to optimize evaluation, treatments and therapies, especially early treatments with less invasive methods.

STUDY OBJECTIVE:This study assessed whether implementation of an enhanced recovery-based pathway decreased length of stay without increasing readmissions among patients with adolescent idiopathic scoliosis undergoing posterior spinal fusion.DESIGN:Retrospective observational before-and-after study.SETTING:A tertiary children's hospital.PATIENTS:A total of 117 patients were studied, 78 in the pre-intervention group and 39 in the post-intervention group. All patients underwent posterior spinal fusion (PSF) for adolescent idiopathic scoliosis (AIS) in the same institution with one of two spine surgeons. Age, sex, American Society of Anesthesiologists physical status, and Cobb angle were comparable between the two groups.INTERVENTIONS:Between the pre- and post-intervention groups an enhanced recovery protocol was developed. The pathway included standardized use of nonopioid analgesics, proactive transition to oral analgesics, scheduled antiemetics, plans for diet advancement, and specific physical therapy goals.MEASUREMENTS:Outcome measurements included hospital length of stay, cumulative opioid doses in the first two postoperative days, and time to discontinuation of urinary catheter and patient-controlled analgesia. Postoperative emergency department visits, hospital readmissions and chronic pain management referrals were also measured. Pain scores on postoperative days one through four were recorded.MAIN RESULTS:Hospital length of stay decreased from 4.6 days to 3.8 days. Patient-controlled analgesia (PCA) was discontinued one day earlier on average following pathway implementation. Average cumulative postoperative opioid use, in morphine equivalents, decreased in the first two postoperative days from 2.5 to 2.2 mg/kg. There was no change in hospital readmission rate or postoperative chronic pain referral.CONCLUSIONS:Patients undergoing PSF for AIS experienced shorter hospital stays without increased readmissions following the implementation of an enhanced recovery pathway. Development of this pathway required buy-in from multiple stakeholders and significant coordination among services. The principles used to develop this pathway may be applied in other institutions and to other patient populations using the model outlined here.

Fully revised and updated, the third edition delivers targeted guidance on the diagnosis, treatment, and management of orthopaedic problems and sports injuries. (This book features a full text reading experience. Click a chapter title to access content.) Available for purchase at https://shop.aap.org/pediatric-orthopaedics-and-sports-injuries-a-quick-reference-guide-3rd-edition-paperback/

Scoliosis, an abnormal curvature of the human spinal column, is characterized by a lateral deviation of the spine, accompanied by axial rotation of the vertebrae. Adolescent Idiopathic Scoliosis (AIS) is the most common type, affecting children between ages 8 to 18 when bone growth is at its maximum rate. We propose a mechanistic machine learning algorithm in order to study patient-specific AIS curve progression, which is associated with the bone growth and other genetic and environmental factors. Two different frameworks are used to analyse and predict curve progression, one with implementing clinical data extracted from 2D X-ray images and the other one with incorporating both clinical data and physical equations governing the non-uniform bone growth. The physical equations governing bone growth are affiliated with calculating all stress components at each region. The stress values are evaluated through a surrogate finite element simulation and a bone growth model on a detailed patient-specific geometry of the human spine. We also propose a patient-specific framework to generate the volumetric model of human spine which is partitioned into different tissues for both vertebra and intervertebral disc. It is shown that implementing physical equations governing bone growth into the prediction framework will notably improve the prediction results as compared to only using clinical data for prediction. In addition, we can predict curve progression at ages outside the range of training samples.

Limb contractures are debilitating complications associated with various muscle and nervous system disorders. This report summarizes presentations at a conference at the Shirley Ryan AbilityLab in Chicago, Illinois, on April 19-20, 2018, involving researchers and physicians from diverse disciplines who convened to discuss current clinical and preclinical understanding of contractures in Duchenne muscular dystrophy, stroke, cerebral palsy, and other conditions. Presenters described changes in muscle architecture, activation, extracellular matrix, satellite cells, and muscle fiber sarcomeric structure that accompany or predispose muscles to contracture. Participants identified ongoing and future research directions that may lead to understanding of the intersecting factors that trigger contractures. These include additional studies of changes in muscle, tendon, joint, and neuronal tissues during contracture development with imaging, molecular, and physiologic approaches. Participants identified the requirement for improved biomarkers and outcome measures to identify patients likely to develop contractures and to accurately measure efficacy of treatments currently available and under development.

OBJECTIVE:IS (idiopathic scoliosis) is a common spinal condition occurring in otherwise completely healthy adolescents. The root cause of IS remains unclear. This systematic review will focus on an update of genetic factors and IS etiology. Though it is generally accepted that the condition is not due to a single gene effect, etiology studies continue looking for a root cause including genetic variants. Though susceptibility from multiple genetic components is plausible based on known family history data, the literature remains unclear regarding multifactorial genetic influences. The objective of this study was to critically evaluate the evidence behind genetic causes (not single gene) of IS through a systematic review and strength-of-study analysis of existing genetic and genome-wide association studies (GWAS). We used the protocol of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA).METHODS:PubMed was searched for the terms IS, scoliotic, spinal curve, genetic, gene, etiology, polymorphisms. Articles were assessed for risk-of-bias. Level-of-evidence grading was completed via Oxford Centre for Evidence-Based Medicine criteria. The assessment scores factor strength of a study in determining a positive or negative association to a gene etiology.RESULTS:After screening of 36 eligible papers, 8 relevant studies met inclusion criteria at this time, 3 were in favor of a genetic factor for IS, whereas 5 studies were against it.CONCLUSION:Based on the literature analyzed, there is moderate evidence with a low risk-of-bias that does not clarify a genetic cause of IS. The 2 studies in favor of a genetic etiology were completed in homogeneous populations, limiting their generalizability. Relying on a genetic etiology alone for IS may over simplify its multifactorial nature and limit appreciation of other influences.

Sarwark, John F. MD1; Castelein, Rene M. MD, PhD2; Maqsood, Ayesha MD1; Aubin, Carl-Eric PhD3 Author Information

Adolescent idiopathic scoliosis (AIS) a common spinal condition affecting adolescents. Though the etiology is still unknown, it is widely thought to have a multifactorial etiology and early diagnosis remains a significant challenge. The purpose of this study is to identify early vertebral morphological changes and patterns of spinal asymmetry in these at-risk individuals who later progress to adolescent idiopathic scoliosis. This was a retrospective study of patients treated for AIS between 1997 and 2017. We utilized two study groups, a group with immature onset of spinal asymmetry and a control group. Inclusion criteria for the immature onset group was defined by a Cobb angle between 10 and 40° diagnosed prior to the age of 12 with MRI scans and XRs available for review. Qualitative assessments observed for sagittal vertebral wedging, analysis of vertebral corner anatomy, spinal harmony, and sagittal balance. These findings were then qualitatively compared between groups. Twenty patients were included in this study, ten each in the immature onset and control groups. In the immature onset group, two patients had sagittal wedging, five had abnormal vertebral corners, nine did not have spinal harmony, and nine had negative sagittal balance, compared to none of the control patients having sagittal wedging, none having abnormal vertebral corners, all having spinal harmony, and nine having positive spinal balance. This pilot MRI study identifies qualitative vertebral morphological changes in patients who progress to AIS. Our findings suggest abnormal vertebral corner anatomy, sagittal wedging, and negative sagittal balance as potential early findings in patients who develop AIS.

BACKGROUND: Preoperative pulmonary function tests are routinely obtained in children with scoliosis undergoing posterior spinal fusion despite unclear benefits as a perioperative risk assessment tool and frequent inability of patients to provide acceptable results. The goal of this study was to determine whether preoperative pulmonary function test results are associated with the need for postoperative intubation or intensive care unit admission after posterior spinal fusion. METHODS: The electronic medical records of patients who underwent posterior spinal fusion at a pediatric tertiary hospital between June 2012 and August 2017 were reviewed. Pulmonary function tests were consistently ordered for all patients, unless the patient was deemed unable to perform the test due to cognitive disability. Cases were categorized as primary or secondary scoliosis. Demographic data, preoperative bilevel positive airway pressure use, Cobb angle, intraoperative allogeneic blood transfusion, and ability to produce acceptable pulmonary function test results were collected for each patient. In patients with satisfactory pulmonary function test results, forced vital capacity and maximum inspiratory pressure were collected. Primary outcomes for analysis were postoperative intubation and intensive care unit admission. Univariable logistic regression models were used to assess the association between each variable of interest and the primary outcomes. RESULTS: The study sample included 433 patients, 288 with primary scoliosis and 145 with secondary scoliosis. Among patients with primary scoliosis, 90% were able to produce acceptable pulmonary function test results, zero remained intubated postoperatively, and 6 were admitted to the intensive care unit. Among patients with secondary scoliosis, 44% could not attempt pulmonary function tests. Among those who did attempt the test, 30% were unable to produce meaningful results. Forced vital capacity and maximum inspiratory pressure were not found to be associated with postoperative intubation or intensive care unit admission. Weight, Cobb angle, intraoperative blood transfusion, American Society of Anesthesiologists physical status classification, and preoperative bilevel positive airway pressure use were associated with patient outcomes. Among 357 total patients who attempted pulmonary function tests, 37 had high-risk results. Only 1 of these 37 patients remained intubated postoperatively. CONCLUSIONS: Patients undergoing posterior spinal fusion, especially those with secondary scoliosis, are frequently unable to adequately perform pulmonary function tests. Among patients with interpretable pulmonary function tests, there was no association between results and postoperative intubation or intensive care unit admission. Routine pulmonary function testing for all patients with scoliosis may not be indicated for purposes of risk assessment before posterior spinal fusion. Clinicians should consider a targeted approach and limit pulmonary function tests to patients for whom results may guide preoperative optimization as this may improve outcomes and reduce inefficiencies and costs.

PURPOSE:The evaluation, management and follow-up of adolescent idiopathic scoliosis (AIS) occur frequently within a pediatric orthopedic surgery practice. Curve status can be assessed with Scoliometer measurements of angle trunk rotation (ATR), which are reliable and reproducible to within 3°. This study assessed the longitudinal efficacy, safety and cost savings of integrating ATR measurements to monitor curve status and progression in AIS, and suggests a quality-based management strategy. METHODS:A retrospective review of medical records between 2004 and 2014 included patients with AIS between 10-17 years, excluding those with Cobb angle >52° at presentation. Two cohorts were analyzed based on presentation prior to menarche (PRE) or after menarche (POST). The PRE groups was further classified based on whether the curve was Stable or Unstable. The cost of a single PA thoracolumbar radiograph was defined based on the 2015 CMS fee schedule ($36.27). Safety was defined based on the effective radiation dose avoided (0.14 millisieverts/radiograph). RESULTS:A total of 59 children were included with 45 in PRE and 14 in the POST cohort. The use of ATR measurements provided a cost benefit in both the PRE Stable and Unstable cohorts, by avoiding radiographs with an average savings of $161.76 and $147.50 respectively. Similarly in POST, there was an average cost savings of $105.18 per patient. The safety benefit of using ATR measurements included avoiding an average of 0.62, 0.56 and 0.4 millisieverts of radiation in the PRE Stable, PRE Unstable and POST groups respectively. CONCLUSIONS:An evaluation strategy with ATR measurements provides for a reliable, cost-effective and safety advantage in the monitoring of curve progression in both skeletally mature and immature patients with AIS. These findings suggest that stable ATR measurements are a safe and cost effective alternative to serial radiographs in the clinical monitoring of AIS. Recent evidence from 25 years of scoliosis treatment in Denmark noted a cancer rate 17 times that of an age-matched population. Thus, reducing radiation exposure during scoliosis monitoring using ATR measurements has important clinical significance for cancer risk reduction.

BACKGROUND:Pediatric femur fractures are frequently encountered injuries frequently treated with spica casting. Spica casting may, however, be expensive and burdensome to patients. A possible alternative is a long leg splint. METHODS:Patients aged 6 months to 5 years old who were treated for a femoral shaft fracture with a long leg splint extending above the waist were matched with a patient treated with a spica cast. RESULTS:At the time of healing, the alignment in the spica cast group was only significantly better than the alignment of the splint group with respect to coronal angulation.