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Khair AM, McIlvain G, McGarry MDJ, Kandula V, Yue X, Kaur G, Averill LW, Choudhary AK, Johnson CL, Nikam RM. Clinical application of magnetic resonance elastography in pediatric neurological disorders. Pediatr Radiol 2023; 53:2712-2722. [PMID: 37794174 PMCID: PMC11086054 DOI: 10.1007/s00247-023-05779-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 10/06/2023]
Abstract
Magnetic resonance elastography is a relatively new, rapidly evolving quantitative magnetic resonance imaging technique which can be used for mapping the viscoelastic mechanical properties of soft tissues. MR elastography measurements are akin to manual palpation but with the advantages of both being quantitative and being useful for regions which are not available for palpation, such as the human brain. MR elastography is noninvasive, well tolerated, and complements standard radiological and histopathological studies by providing in vivo measurements that reflect tissue microstructural integrity. While brain MR elastography studies in adults are becoming frequent, published studies on the utility of MR elastography in children are sparse. In this review, we have summarized the major scientific principles and recent clinical applications of brain MR elastography in diagnostic neuroscience and discuss avenues for impact in assessing the pediatric brain.
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Affiliation(s)
| | - Grace McIlvain
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA
| | | | - Vinay Kandula
- Department of Radiology, Nemours Children's Hospital, Wilmington, DE, USA
| | - Xuyi Yue
- Department of Radiology, Nemours Children's Hospital, Wilmington, DE, USA
- Department of Biomedical Research, Nemours Children's Hospital, Wilmington, DE, USA
| | - Gurcharanjeet Kaur
- Department of Neurology, New York-Presbyterian / Columbia University Irving Medical Center, New York, NY, USA
| | - Lauren W Averill
- Department of Radiology, Nemours Children's Hospital, Wilmington, DE, USA
| | - Arabinda K Choudhary
- Department of Radiology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Curtis L Johnson
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA
- Department of Biomedical Research, Nemours Children's Hospital, Wilmington, DE, USA
| | - Rahul M Nikam
- Department of Radiology, Nemours Children's Hospital, Wilmington, DE, USA.
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Theroux MC, DiCindio S, Averill LW, Pizarro C, Oommen A, Bober MB, Ditro C, Campbell J, Duker AL, Jones T, Passi V, Barth P, Schmidt RJ, Little M, Mackenzie S, Tomatsu S, Mackenzie WG. Tracheal Narrowing and Its Impact on Anesthesia Care in Patients With Morquio A (Mucopolysaccharidosis Type IVA): An Observational Study. Anesth Analg 2023; 137:1075-1083. [PMID: 37862598 PMCID: PMC10634225 DOI: 10.1213/ane.0000000000006513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
BACKGROUND Recently, tracheal narrowing has been recognized as a significant comorbid condition in patients with Morquio A, also known as mucopolysaccharidosis IVA. We studied a large cohort of patients with Morquio A to describe the extent of their tracheal narrowing and its relationship to airway management during anesthesia care. METHODS This is an observational study, collecting data retrospectively, of a cohort of patients with Morquio A. Ninety-two patients with Morquio A syndrome were enrolled, among whom 44 patients had their airway evaluated by computed tomography angiography and had undergone an anesthetic within a year of the evaluation. Our hypothesis was that the tracheal narrowing as evaluated by computed tomography angiography increases with age in patients with Morquio A. The primary aim of the study was to examine the degree of tracheal narrowing in patients with Morquio A and describe the difficulties encountered during airway management, thus increasing awareness of both the tracheal narrowing and airway management difficulties in this patient population. In addition, the degree of tracheal narrowing was evaluated for its association with age or spirometry parameters using Spearman's rank correlation. Analysis of variance followed by the Bonferroni test was used to further examine the age-based differences in tracheal narrowing for the 3 age groups: 1 to 10 years, 11 to 20 years, and >21 years. RESULTS Patient age showed a positive correlation with tracheal narrowing ( rs= 0.415; 95% confidence interval [95% CI], 0.138-0.691; P = .005) with older patients having greater narrowing of the trachea. Among spirometry parameters, FEF25%-75% showed an inverse correlation with tracheal narrowing as follows: FEF25%-75% versus tracheal narrowing: ( rs = -0.467; 95% CI, -0.877 to -0.057; P = .007). During anesthetic care, significant airway management difficulties were encountered, including cancelation of surgical procedures, awake intubation using flexible bronchoscope, and failed video laryngoscopy attempts. CONCLUSIONS Clinically significant tracheal narrowing was present in patients with Morquio A, and the degree of such narrowing likely contributed to the difficulty with airway management during their anesthetic care. Tracheal narrowing worsens with age, but the progression appears to slow down after 20 years of age. In addition to tracheal narrowing, spirometry values of FEF25%-75% may be helpful in the overall evaluation of the airway in patients with Morquio A.
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Affiliation(s)
- Mary C. Theroux
- Department of Anesthesiology and Perioperative Medicine, Thomas Jefferson University, Philadelphia, PA, USA
| | - Sabina DiCindio
- Department of Anesthesiology and Perioperative Medicine, Thomas Jefferson University, Philadelphia, PA, USA
| | - Lauren W. Averill
- Department of Radiology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Christian Pizarro
- Division of Cardiology and Cardiothoracic Surgery, Thomas Jefferson University, Philadelphia, PA, USA
| | - Abraham Oommen
- Department of Anesthesiology and Perioperative Medicine, Thomas Jefferson University, Philadelphia, PA, USA
| | - Michael B. Bober
- Division of Genetics, Thomas Jefferson University, Philadelphia, PA, USA
| | - Colleen Ditro
- Department of Orthopedics, Thomas Jefferson University, Philadelphia, PA, USA
| | - Jeffrey Campbell
- Division of Neurosurgery, Thomas Jefferson University, Philadelphia, PA, USA
| | - Angela L. Duker
- Division of Genetics, Thomas Jefferson University, Philadelphia, PA, USA
| | - Taylor Jones
- Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA, USA
| | - Vandna Passi
- Division of Pulmonology, Nemours Children’s Health Delaware Valley, Wilmington, DE, USA
| | - Patrick Barth
- Division of Otolaryngology, Nemours Children’s Health Delaware Valley, Wilmington, DE, USA
| | - Richard J. Schmidt
- Division of Otolaryngology, Nemours Children’s Health Delaware Valley, Wilmington, DE, USA
| | - Mary Little
- Department of Orthopedics, Thomas Jefferson University, Philadelphia, PA, USA
| | - Stuart Mackenzie
- Department of Orthopedics, Thomas Jefferson University, Philadelphia, PA, USA
| | - Shunji Tomatsu
- Nemours Biomedical Research, Nemours Children’s Health Delaware Valley, Wilmington, DE, USA
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Averill LW, Kraft DB, Sabado JJ, Atanda A, Long SS, Nazarian LN. Ultrasonography of the pediatric elbow. Pediatr Radiol 2023; 53:1526-1538. [PMID: 36869262 DOI: 10.1007/s00247-023-05623-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/27/2023] [Accepted: 01/30/2023] [Indexed: 03/05/2023]
Abstract
Ultrasound of the elbow can be incorporated into routine pediatric practice in the radiology department, emergency department, orthopedic clinic, and interventional suite. Ultrasound is complementary to radiography and magnetic resonance imaging for the evaluation of elbow pain in athletes with overhead activities or valgus stress, focusing on the ulnar collateral ligament medially and capitellum laterally. As a primary imaging modality, ultrasound can be used for a variety of indications including inflammatory arthritis, fracture diagnosis, and ulnar neuritis/subluxation. Ultrasound is also well-suited to guide diagnostic and therapeutic elbow joint interventions with precise localization of anatomic landmarks and needle placement. Here, we describe technical aspects of elbow ultrasound and illustrate its application in pediatric patients from infants to teen athletes.
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Affiliation(s)
- Lauren W Averill
- Department of Radiology, Nemours Children's Health, 1600 Rockland Road, Wilmington, DE, 19803, USA.
| | - Denver B Kraft
- Department of Orthopaedic Surgery, Georgetown University Hospital, Washington, DC, USA
| | - Jeremiah J Sabado
- Department of Radiology, Nationwide Children's Hospital, Columbus, OH, USA
| | - Alfred Atanda
- Department of Orthopaedic Surgery, Nemours Children's Health, Wilmington, DE, USA
| | - Suzanne S Long
- Department of Radiology, Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA, USA
| | - Levon N Nazarian
- Department of Radiology, Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA, USA
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Nikam RM, Kecskemethy HH, Kandula VVR, Averill LW, Langhans SA, Yue X. Abusive Head Trauma Animal Models: Focus on Biomarkers. Int J Mol Sci 2023; 24:4463. [PMID: 36901893 PMCID: PMC10003453 DOI: 10.3390/ijms24054463] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/07/2023] [Accepted: 02/17/2023] [Indexed: 02/26/2023] Open
Abstract
Abusive head trauma (AHT) is a serious traumatic brain injury and the leading cause of death in children younger than 2 years. The development of experimental animal models to simulate clinical AHT cases is challenging. Several animal models have been designed to mimic the pathophysiological and behavioral changes in pediatric AHT, ranging from lissencephalic rodents to gyrencephalic piglets, lambs, and non-human primates. These models can provide helpful information for AHT, but many studies utilizing them lack consistent and rigorous characterization of brain changes and have low reproducibility of the inflicted trauma. Clinical translatability of animal models is also limited due to significant structural differences between developing infant human brains and the brains of animals, and an insufficient ability to mimic the effects of long-term degenerative diseases and to model how secondary injuries impact the development of the brain in children. Nevertheless, animal models can provide clues on biochemical effectors that mediate secondary brain injury after AHT including neuroinflammation, excitotoxicity, reactive oxygen toxicity, axonal damage, and neuronal death. They also allow for investigation of the interdependency of injured neurons and analysis of the cell types involved in neuronal degeneration and malfunction. This review first focuses on the clinical challenges in diagnosing AHT and describes various biomarkers in clinical AHT cases. Then typical preclinical biomarkers such as microglia and astrocytes, reactive oxygen species, and activated N-methyl-D-aspartate receptors in AHT are described, and the value and limitations of animal models in preclinical drug discovery for AHT are discussed.
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Affiliation(s)
- Rahul M. Nikam
- Diagnostic & Research PET/MR Center, Nemours Children’s Health, Wilmington, DE 19803, USA
- Department of Radiology, Nemours Children’s Health, Wilmington, DE 19803, USA
| | - Heidi H. Kecskemethy
- Diagnostic & Research PET/MR Center, Nemours Children’s Health, Wilmington, DE 19803, USA
- Department of Radiology, Nemours Children’s Health, Wilmington, DE 19803, USA
| | - Vinay V. R. Kandula
- Department of Radiology, Nemours Children’s Health, Wilmington, DE 19803, USA
| | - Lauren W. Averill
- Diagnostic & Research PET/MR Center, Nemours Children’s Health, Wilmington, DE 19803, USA
- Department of Radiology, Nemours Children’s Health, Wilmington, DE 19803, USA
| | - Sigrid A. Langhans
- Diagnostic & Research PET/MR Center, Nemours Children’s Health, Wilmington, DE 19803, USA
- Nemours Biomedical Research, Nemours Children’s Health, Wilmington, DE 19803, USA
| | - Xuyi Yue
- Diagnostic & Research PET/MR Center, Nemours Children’s Health, Wilmington, DE 19803, USA
- Department of Radiology, Nemours Children’s Health, Wilmington, DE 19803, USA
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Kerner DM, Nikam R, Kandula VVR, Averill LW. Pearls and Pitfalls in Arterial Spin Labeling Perfusion-Weighted Imaging in Clinical Pediatric Imaging. Semin Ultrasound CT MR 2022; 43:19-30. [PMID: 35164906 DOI: 10.1053/j.sult.2021.05.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Characteristic arterial spin labeling (ASL) perfusion patterns are seen in a wide variety of pediatric brain pathologies, highlighting the potential added value and prognostic role of this magnetic resonance imaging (MRI) perfusion-weighted imaging modality. Our objective is to review the basic clinical physics, technical underpinnings, and artifacts and challenges as we highlight some of the most clinically relevant pathologies to the application of ASL in the pediatric setting.
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Affiliation(s)
- David M Kerner
- Department of Radiology, Nemours Children's Health System, Alfred I. duPont Hospital for Children, Wilmington, DE
| | - Rahul Nikam
- Department of Radiology, Nemours Children's Health System, Alfred I. duPont Hospital for Children, Wilmington, DE
| | - Vinay V R Kandula
- Department of Radiology, Nemours Children's Health System, Alfred I. duPont Hospital for Children, Wilmington, DE
| | - Lauren W Averill
- Department of Radiology, Nemours Children's Health System, Alfred I. duPont Hospital for Children, Wilmington, DE.
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Yue X, Nikam RM, Kecskemethy HH, Kandula VVR, Falchek SJ, Averill LW, Langhans SA. Radiosynthesis of 1-(2-[18F]Fluoroethyl)-L-Tryptophan using a One-pot, Two-step Protocol. J Vis Exp 2021. [PMID: 34633385 DOI: 10.3791/63025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The kynurenine pathway (KP) is a primary route for tryptophan metabolism. Evidence strongly suggests that metabolites of the KP play a vital role in tumor proliferation, epilepsy, neurodegenerative diseases, and psychiatric illnesses due to their immune-modulatory, neuro-modulatory, and neurotoxic effects. The most extensively used positron emission tomography (PET) agent for mapping tryptophan metabolism, α-[11C]methyl-L-tryptophan ([11C]AMT), has a short half-life of 20 min with laborious radiosynthesis procedures. An onsite cyclotron is required to radiosynthesize [11C]AMT. Only a limited number of centers produce [11C]AMT for preclinical studies and clinical investigations. Hence, the development of an alternative imaging agent that has a longer half-life, favorable in vivo kinetics, and is easy to automate is urgently needed. The utility and value of 1-(2-[18F]fluoroethyl)-L-tryptophan, a fluorine-18-labeled tryptophan analog, has been reported in preclinical applications in cell line-derived xenografts, patient-derived xenografts, and transgenic tumor models. This paper presents a protocol for the radiosynthesis of 1-(2-[18F]fluoroethyl)-L-tryptophan using a one-pot, two-step strategy. Using this protocol, the radiotracer can be produced in a 20 ± 5% (decay corrected at the end of synthesis, n > 20) radiochemical yield, with both radiochemical purity and enantiomeric excess of over 95%. The protocol features a small precursor amount with no more than 0.5 mL of reaction solvent in each step, low loading of potentially toxic 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane (K222), and an environmentally benign and injectable mobile phase for purification. The protocol can be easily configured to produce 1-(2-[18F]fluoroethyl)-L-tryptophan for clinical investigation in a commercially available module.
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Affiliation(s)
- Xuyi Yue
- Diagnostic & Research PET/MRI Center, Nemours/Alfred I. duPont Hospital for Children; Department of Radiology, Nemours/Alfred I. duPont Hospital for Children;
| | - Rahul M Nikam
- Diagnostic & Research PET/MRI Center, Nemours/Alfred I. duPont Hospital for Children; Department of Radiology, Nemours/Alfred I. duPont Hospital for Children
| | - Heidi H Kecskemethy
- Diagnostic & Research PET/MRI Center, Nemours/Alfred I. duPont Hospital for Children; Department of Radiology, Nemours/Alfred I. duPont Hospital for Children
| | - Vinay V R Kandula
- Department of Radiology, Nemours/Alfred I. duPont Hospital for Children
| | - Stephen J Falchek
- Department of Neurology, Nemours/Alfred I. duPont Hospital for Children
| | - Lauren W Averill
- Diagnostic & Research PET/MRI Center, Nemours/Alfred I. duPont Hospital for Children; Department of Radiology, Nemours/Alfred I. duPont Hospital for Children
| | - Sigrid A Langhans
- Diagnostic & Research PET/MRI Center, Nemours/Alfred I. duPont Hospital for Children; Department of Biomedical Research, Nemours/Alfred I. duPont Hospital for Children
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Tolend M, Doria AS, Meyers AB, Larheim TA, Abramowicz S, Aguet J, Appenzeller S, Arvidsson LZ, Averill LW, Feldman BM, Guleria S, Inarejos Clemente EJ, Jaremko JL, Junhasavasdikul T, von Kalle T, Kirkhus E, Koos B, Miller E, Moineddin R, Panwar J, Peacock ZS, Resnick CM, van Rossum MA, Stimec J, Tomlinson G, Tzaribachev N, Kellenberger CJ. Assessing the Reliability of the OMERACT Juvenile Idiopathic Arthritis Magnetic Resonance Scoring System for Temporomandibular Joints (JAMRIS-TMJ). J Clin Med 2021; 10:jcm10184047. [PMID: 34575158 PMCID: PMC8467699 DOI: 10.3390/jcm10184047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/22/2021] [Accepted: 08/27/2021] [Indexed: 12/24/2022] Open
Abstract
Contrast-enhanced magnetic resonance imaging (MRI) remains the most comprehensive modality to assess juvenile idiopathic arthritis (JIA)-related inflammation and osteochondral damage in the temporomandibular joints (TMJ). This study tested the reliability of a new JIA MRI scoring system for TMJ (JAMRIS-TMJ) and the impact of variations in calibration and reader specialty. Thirty-one MRI exams of bilateral TMJs were scored independently using the JAMRIS-TMJ by 20 readers consisting of radiologists and non-radiologist clinicians in three reading groups, with or without a calibrating atlas and/or tutorial. The inter-reader reliability in the multidisciplinary cohort assessed by the generalizability coefficient was 0.61–0.67 for the inflammatory and 0.66–0.74 for the damage domain. The atlas and tutorial did not improve agreement within radiologists, but improved the agreement between radiologist and non-radiologist groups. Agreements between different calibration levels were 0.02 to 0.08 lower by the generalizability coefficient compared to agreement within calibration levels; agreement between specialty groups was 0.04 to 0.10 lower than within specialty groups. Averaging two radiologists raised the reliability above 0.8 for both domains. Therefore, the reliability of JAMRIS-TMJ was moderate-to-good depending on the presence of specialty and calibration differences. The atlas and tutorial are necessary to improve reliability when the reader cohort consists of multiple specialties.
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Affiliation(s)
- Mirkamal Tolend
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada; (M.T.); (B.M.F.)
| | - Andrea S. Doria
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada; (M.T.); (B.M.F.)
- Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada; (J.A.); (J.S.)
- Correspondence: ; Tel.: +1-416-813-6079
| | - Arthur B. Meyers
- Department of Radiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH 45229, USA;
| | - Tore A. Larheim
- Department of Maxillofacial Radiology, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway; (T.A.L.); (L.Z.A.)
| | - Shelly Abramowicz
- Division of Oral and Maxillofacial Surgery, Departments of Surgery and Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA;
- Oral and Maxillofacial Surgery, Children’s Healthcare of Atlanta, Atlanta, GA 30322, USA
| | - Julien Aguet
- Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada; (J.A.); (J.S.)
| | - Simone Appenzeller
- Department of Orthopedics, Rheumatology and Traumatology, School of Medical Science, University of Campinas, Campinas 13083-970, Brazil;
| | - Linda Z. Arvidsson
- Department of Maxillofacial Radiology, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway; (T.A.L.); (L.Z.A.)
| | - Lauren W. Averill
- Department of Medical Imaging, Nemours Children’s Health System, Alfred I. duPont Hospital for Children, Wilmington, DE 19803, USA;
| | - Brian M. Feldman
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada; (M.T.); (B.M.F.)
- Division of Rheumatology, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada
| | | | | | - Jacob L. Jaremko
- Department of Radiology & Diagnostic Imaging, University of Alberta, Edmonton, AB T6G 2B7, Canada;
| | | | - Thekla von Kalle
- Department of Pediatric Radiology, Radiologisches Institut, Olgahospital Klinikum Stuttgart, 70174 Stuttgart, Germany;
| | - Eva Kirkhus
- Department of Radiology, Oslo University Hospital, 0424 Oslo, Norway;
| | - Bernd Koos
- Department of Orthodontics, University Hospital Tübingen, 72076 Tübingen, Germany;
| | - Elka Miller
- Department of Medical Imaging, Children’s Hospital of Eastern Ontario, University of Ottawa, Ottawa, ON K1H 8L1, Canada;
| | - Rahim Moineddin
- Department of Family & Community Medicine, University of Toronto, Toronto, ON M5G 1V7, Canada;
| | - Jyoti Panwar
- Department of Radiology, Christian Medical College and Hospital, Vellore 632004, Tamil Nadu, India;
| | - Zachary S. Peacock
- Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital, Boston, MA 02114, USA;
| | - Cory M. Resnick
- Department of Plastic and Oral Surgery, Boston Children’s Hospital, Boston, MA 02115, USA;
| | - Marion A. van Rossum
- Department of Pediatrics, Emma Children’s Hospital, Amsterdam University Medical Center, 1105 AZ Amsterdam, The Netherlands;
- Amsterdam Rheumatology and Immunology Center, Reade, 1007 MB Amsterdam, The Netherlands
| | - Jennifer Stimec
- Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada; (J.A.); (J.S.)
| | - George Tomlinson
- Department of Medicine, University Health Network, Toronto, ON M5G 2C4, Canada;
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Nikam RM, Yue X, Kandula VV, Paudyal B, Langhans SA, Averill LW, Choudhary AK. Unravelling neuroinflammation in abusive head trauma with radiotracer imaging. Pediatr Radiol 2021; 51:966-970. [PMID: 33999238 DOI: 10.1007/s00247-021-04995-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 12/07/2020] [Accepted: 01/27/2021] [Indexed: 01/07/2023]
Abstract
Abusive head trauma (AHT) is a leading cause of mortality and morbidity in child abuse, with a mortality rate of approximately 25%. In survivors, the prognosis remains dismal, with high prevalence of cerebral palsy, epilepsy and neuropsychiatric disorders. Early and accurate diagnosis of AHT is challenging, both clinically and radiologically, with up to one-third of cases missed on initial examination. Moreover, most of the management in AHT is supportive, reflective of the lack of clear understanding of specific pathogenic mechanisms underlying secondary insult, with approaches targeted toward decreasing intracranial hypertension and reducing cerebral metabolism, cell death and excitotoxicity. Multiple studies have elucidated the role of pro- and anti-inflammatory cytokines and chemokines with upregulation/recruitment of microglia/macrophages, oligodendrocytes and astrocytes in severe traumatic brain injury (TBI). In addition, recent studies in animal models of AHT have demonstrated significant upregulation of microglia, with a potential role of inflammatory cascade contributing to secondary insult. Despite the histological and biochemical evidence, there is a significant dearth of specific imaging approaches to identify this neuroinflammation in AHT. The primary motivation for development of such imaging approaches stems from the need to therapeutically target neuroinflammation and establish its utility in monitoring and prognostication. In the present paper, we discuss the available data suggesting the potential role of neuroinflammation in AHT and role of radiotracer imaging in aiding diagnosis and patient management.
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Affiliation(s)
- Rahul M Nikam
- Department of Medical Imaging, Nemours Alfred I. duPont Hospital for Children, 1600 Rockland Road, Wilmington, DE, 19803, USA. .,Katzin Diagnostic & Research PET/MR Center, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA.
| | - Xuyi Yue
- Katzin Diagnostic & Research PET/MR Center, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Vinay V Kandula
- Department of Medical Imaging, Nemours Alfred I. duPont Hospital for Children, 1600 Rockland Road, Wilmington, DE, 19803, USA
| | - Bishnuhari Paudyal
- Katzin Diagnostic & Research PET/MR Center, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Sigrid A Langhans
- Katzin Diagnostic & Research PET/MR Center, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Lauren W Averill
- Department of Medical Imaging, Nemours Alfred I. duPont Hospital for Children, 1600 Rockland Road, Wilmington, DE, 19803, USA
| | - Arabinda K Choudhary
- Department of Radiology, University of Arkansas for Medical Sciences (UAMS), Little Rock, AR, USA
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Nikam RM, Kandula VV, Yue X, Krishnan V, Kumbhar SS, Averill LW, Paudyal B, Choudhary AK. Birth-related subdural hemorrhage: prevalence and imaging morphology. Pediatr Radiol 2021; 51:939-946. [PMID: 33830289 DOI: 10.1007/s00247-021-05060-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 02/13/2021] [Accepted: 03/16/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Birth trauma accounts for 1-2% of the mortality in newborns with significant intracranial injuries presenting in the immediate postnatal period. However, a significant number of asymptomatic neonates harbor birth-related intracranial hemorrhage (ICH), with birth-related subdural hemorrhage (SDH) being a common occurrence on infant brain CT and MRI studies performed as a standard of care for a variety of reasons. Although clinically insignificant, birth-related SDH is frequently brought up in courts as an alternative explanation for SDH in suspected abusive head trauma. OBJECTIVE The aim of this study was to determine prevalence, imaging morphology and distribution of birth-related SDHs on brain CT and MRI studies obtained as a standard of care in infants up to 1 month old. We further tried to ascertain the relationship of birth-related SDHs with mode of delivery and birth weight. MATERIALS AND METHODS Infants up to the age of 1 month who had CT or MRI of the brain performed between Jan. 1, 2018, and March 29, 2020, were included in this retrospective observational study. In addition to the imaging data, we reviewed clinical history, birth history including birth weight and mode of delivery, and final diagnoses. RESULTS Two hundred six infants younger than 30 days (range 0-29 days, mean 11.9 days, median 11 days and standard deviation [SD] 8.4 days) had a CT or MRI study during the study period. Among these, 58 infants were excluded as per the exclusion criteria. Among the included 148 infants, 88 (59.5%) had no imaging evidence of SDH. An additional 56 (37.8%) infants were assessed as having birth-related SDH based on review of clinical data. Within the birth-related SDH cohort (56 infants), only supratentorial SDH was identified in 5 (8.9%), only infratentorial SDH was identified in 14 (25%), while SDHs within both compartments were identified in 37 (66.1%) infants. The most common location for supratentorial birth-related SDH was along the occipital lobes (31/42, 73.8%), with other common locations being along the posterior interhemispheric fissure (30/42, 71.4%) and fronto-parietal convexity (9/42, 21.4%). The distribution of posterior fossa SDH was along the tentorium (38/51, 74.5%), along the cerebellum (38/51, 74.5%) and in both the locations (25/51, 49.0%). The rate of SDH was significantly higher in vaginal delivery group (46/84, 54.7%) as compared to caesarean section group (10/57, 17.5%) (P<0.05). We did not find any statistically significant difference between the birth weights of normal and birth-related SDH cohorts (P>0.05). CONCLUSION Birth-related SDH is a common occurrence, with our study suggesting a prevalence of 37.8%. The most common distribution of birth-related SDH is within both the supra- and infratentorial compartments (66.1%) followed by infratentorial compartment (25%). The rate of birth-related SDH was significantly higher in vaginal delivery group as compared to caesarean section group.
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Affiliation(s)
- Rahul M Nikam
- Department of Medical Imaging, Nemours/Alfred I. duPont Hospital for Children, 1600 Rockland Road, Wilmington, DE, 19803, USA.
| | - Vinay V Kandula
- Department of Medical Imaging, Nemours/Alfred I. duPont Hospital for Children, 1600 Rockland Road, Wilmington, DE, 19803, USA
| | - Xuyi Yue
- Katzin Diagnostic & Research PET/MR Center, Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Vijay Krishnan
- Department of Medical Imaging, Nemours/Alfred I. duPont Hospital for Children, 1600 Rockland Road, Wilmington, DE, 19803, USA
| | - Sachin S Kumbhar
- Department of Radiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Lauren W Averill
- Department of Medical Imaging, Nemours/Alfred I. duPont Hospital for Children, 1600 Rockland Road, Wilmington, DE, 19803, USA
| | - Bishnuhari Paudyal
- Katzin Diagnostic & Research PET/MR Center, Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Arabinda K Choudhary
- Department of Radiology, University of Arkansas for Medical Sciences (UAMS), Little Rock, AR, USA
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10
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Averill LW. CORR Insights®: How Are Indeterminate Pulmonary Nodules at Diagnosis Associated with Survival in Patients with High-Grade Osteosarcoma? Clin Orthop Relat Res 2021; 479:309-311. [PMID: 33332885 PMCID: PMC7899492 DOI: 10.1097/corr.0000000000001529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 09/18/2020] [Indexed: 01/31/2023]
Affiliation(s)
- Lauren W Averill
- L. W. Averill, Department of Medical Imaging, Nemours Children's Health System, Alfred I. duPont Hospital for Children, Wilmington, DE, USA
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11
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Aguado A, Dunn SP, Averill LW, Chikwava KR, Gresh R, Rabinowitz D, Katzenstein HM. Successful use of transarterial radioembolization with yttrium-90 (TARE-Y90) in two children with hepatoblastoma. Pediatr Blood Cancer 2020; 67:e28421. [PMID: 32603027 DOI: 10.1002/pbc.28421] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Primary malignant liver tumors are rare but all require surgical resection as part of therapy with curative intent. A minority of patients have resectable tumors at diagnosis. Chemotherapy has a therapeutic role in hepatoblastoma but only one-third of patients have resectable disease at diagnosis. Two children with hepatoblastoma and suboptimal responses to initial chemotherapy received therapy with transarterial radioembolization utilizing yttrium-90 (TARE-Y90) and had significant response leading to resection and remission. The role of TARE-Y90 needs to be studied further to define its use in primary pediatric liver neoplasms.
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Affiliation(s)
- Allison Aguado
- Division of Interventional Radiology, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware
| | - Stephen P Dunn
- Division of Pediatric Surgery, Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE
| | - Lauren W Averill
- Division of Interventional Radiology, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware
| | - Kudakwashe R Chikwava
- Division of Anatomic Pathology, Department of Pathology, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware
| | - Renee Gresh
- Division of Hematology/Oncology and Bone Marrow Transplantation, Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE
| | - Deborah Rabinowitz
- Division of Interventional Radiology, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware
| | - Howard M Katzenstein
- Division of Hematology/Oncology and Bone Marrow Transplantation, Nemours Children's, Specialty Care and Wolfson Children's Hospital, Jacksonville, Florida
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12
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Mizrahi DJ, Averill LW, Blumer SL, Meyers AB. Chronic lesser tuberosity avulsion in an adolescent with an associated biceps pulley injury. Pediatr Radiol 2018; 48:749-753. [PMID: 29103066 DOI: 10.1007/s00247-017-4016-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 08/26/2017] [Accepted: 10/17/2017] [Indexed: 10/18/2022]
Abstract
We report a case of a 15-year-old boy with chronic intermittent left shoulder pain due to an undiagnosed lesser tuberosity avulsion fracture, an associated biceps pulley injury and intra-articular dislocation of the long head of the biceps tendon. Lesser tuberosity avulsion fractures are rare injuries that are difficult to detect on clinical exam and radiographically, which may lead to delayed diagnosis and chronic shoulder instability. Few reports describe dislocations or subluxations of the biceps tendon in association with lesser tuberosity avulsions in children. We utilize this case to emphasize the importance of MR not only in detecting lesser tuberosity avulsions, but also in evaluating biceps pulley injuries, which are a rarely reported, but clinically important, association.
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Affiliation(s)
- Daniel J Mizrahi
- Department of Medical Imaging, Nemours Children's Health System, A. I. duPont Hospital for Children, Wilmington, DE, USA.,Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA, USA
| | - Lauren W Averill
- Department of Medical Imaging, Nemours Children's Health System, A. I. duPont Hospital for Children, Wilmington, DE, USA.,Department of Radiology, Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA, USA
| | - Steven L Blumer
- Department of Medical Imaging, Nemours Children's Health System, A. I. duPont Hospital for Children, Wilmington, DE, USA.,Department of Radiology, Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA, USA
| | - Arthur B Meyers
- Department of Medical Imaging, Nemours Children's Health System, Nemours Children's Hospital, 13535 Nemours Parkway, Orlando, FL, 32827, USA.
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13
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Doherty C, Averill LW, Theroux M, Mackenzie WG, Pizarro C, Mason RW, Tomatsu S. Natural history of Morquio A patient with tracheal obstruction from birth to death. Mol Genet Metab Rep 2017; 14:59-67. [PMID: 29326877 PMCID: PMC5758848 DOI: 10.1016/j.ymgmr.2017.11.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 11/27/2017] [Accepted: 11/27/2017] [Indexed: 01/05/2023] Open
Abstract
Morquio A syndrome (mucopolysaccharidosis IVA, MPS IVA) is a lysosomal storage disease caused by a deficiency of N-acetylgalactosamine-6-sulfate sulfatase, resulting in systemic accumulation of the partially degraded glycosaminoglycans (GAGs), keratan sulfate and chondroitin-6-sulfate. The accumulation of these GAGs leads to distinguishing features as skeletal dysplasia with disproportionate dwarfism, short neck, kyphoscoliosis, pectus carinatum, tracheal obstruction, coxa valga, genu valgum, and joint laxity. In the absence of autopsied cases and systemic analysis of multiple tissues, the pathological mechanism of the characteristic skeletal dysplasia associated with the disease largely remains a question. Here we report an autopsied case of a 23-year-old male with MPS IVA, who developed characteristic skeletal abnormalities by 4 months of age and died of severe tracheal obstruction and hypoventilation originating from respiratory muscle weakness from neurological cord deficit due to cord myelopathy at the age of 23. We analyzed postmortem tissues pathohistologically, including the thyroid, lung, lung bronchus, trachea, heart, aorta, liver, spleen, kidney, testes, humerus, knee cartilage, and knee ligament. Examination of the tissues demonstrated systemic storage materials in multiple tissues, as well as severely ballooned and vacuolated chondrocytes in the trachea, humerus, knee cartilage, and lung bronchus. This autopsied case with MPS IVA addresses the importance of tracheal obstruction for morbidity and mortality of the disease, and the pathological findings contribute to a further understanding of the pathogenesis of MPS IVA and the development of novel therapies. Severe tracheal obstruction and respiratory failure are the leading causes of morbidity and mortality in MPS IVA patients. The majority of chondrocytes in the examined locations were enlarged and vacuolated. Tracheal obstruction is confirmed clinically, pathologically, and radiographically. Risk factors and surgical intervention of tracheal obstruction should be considered to save the lives of MPS IVA patients. MPS IVA should be evaluated in a multifaceted approach.
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Affiliation(s)
- Caitlin Doherty
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, USA
- University of Delaware, Newark, DE, USA
| | | | - Mary Theroux
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | | | | | - Robert W. Mason
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Shunji Tomatsu
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, USA
- Department of Pediatrics, Gifu University, Gifu, Japan
- Department of Pediatrics, Thomas Jefferson University, Philadelphia, PA, USA
- Corresponding author at: Skeletal Dysplasia Center, Nemours Biomedical Research, Nemours/Alfred I. DuPont Hospital for Children, 1600 Rockland Rd., Wilmington, DE 19803, USA.Skeletal Dysplasia CenterNemours Biomedical ResearchNemours/Alfred I. DuPont Hospital for Children1600 Rockland Rd.WilmingtonDE19803USA
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14
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Pizarro C, Davies RR, Theroux M, Spurrier EA, Averill LW, Tomatsu S. Surgical Reconstruction for Severe Tracheal Obstruction in Morquio A Syndrome. Ann Thorac Surg 2017; 102:e329-31. [PMID: 27645974 DOI: 10.1016/j.athoracsur.2016.02.113] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Revised: 01/28/2016] [Accepted: 02/08/2016] [Indexed: 10/21/2022]
Abstract
Progressive tracheal obstruction is commonly seen in Morquio A syndrome and can lead to life-threatening complications. Although tracheostomy can address severe upper airway obstruction, lower airway obstruction, commonly associated with a narrow thoracic inlet and vascular compression, requires an alternative approach. We describe the case of a 16-year-old patient with Morquio A syndrome whose near-fatal tracheal obstruction was relieved by timely surgical tracheal vascular reconstruction with dramatic resolution of his respiratory symptoms.
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Affiliation(s)
- Christian Pizarro
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware.
| | - Ryan R Davies
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware
| | - Mary Theroux
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware
| | - Ellen A Spurrier
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware
| | - Lauren W Averill
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware
| | - Shunji Tomatsu
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware
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15
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Atanda A, Averill LW, Wallace M, Niiler TA, Nazarian LN, Ciccotti MG. Factors Related to Increased Ulnar Collateral Ligament Thickness on Stress Sonography of the Elbow in Asymptomatic Youth and Adolescent Baseball Pitchers. Am J Sports Med 2016; 44:3179-3187. [PMID: 27587742 DOI: 10.1177/0363546516661010] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Stress ultrasound (SUS) of the elbow has demonstrated changes in the anterior band of the ulnar collateral ligament (UCL) in professional and high school-aged pitchers. However, there have been no large reports correlating pitching history data with SUS changes in youth and adolescent baseball pitchers. HYPOTHESIS Changes of the UCL on SUS will correlate with pitching volume in youth and adolescent baseball pitchers. STUDY DESIGN Cross-sectional study; Level of evidence, 3. METHODS SUS of the elbow was performed in both elbows of 102 youth and adolescent baseball pitchers. UCL thickness and the width of the ulnohumeral joint, at rest and with 150 N of valgus stress, were measured using a standardized, instrumented device. Demographic data, arm measurements, and a pitching history questionnaire were recorded as well. The pitchers were separated into 2 groups based on age: group 1 (12-14 years) and group 2 (15-18 years). SUS findings of the dominant elbows were compared between the 2 groups. Correlation analysis and linear regression were used to identify relationships between SUS findings and pitching history data. RESULTS In all pitchers, the mean UCL thickness was 4.40 mm in the dominant elbow and 4.11 mm in the nondominant elbow (P =.03). There was no significant difference between elbows in any joint space characteristics. A comparison of group 1 versus group 2 demonstrated significant differences in UCL thickness (4.13 vs 4.96 mm; P < .001), resting joint space width (6.56 vs 4.04 mm; P < .001), and stressed joint space width (7.68 vs 4.07 mm; P < .001). There was no difference in the change in joint space width between the 2 groups (1.11 vs 0.76 mm; P = .05). The UCL was significantly thicker in pitchers who threw more than 67 pitches per appearance (4.69 vs 4.14 mm), who pitched more than 5 innings per appearance (4.76 vs 4.11 mm), and who had more than 5.5 years of pitching experience (4.71 vs 4.07 mm; P < .001). Linear regression demonstrated that age, weight, and pitches per appearance (R 2 = 0.114, 0.370, and 0.326, respectively) significantly correlated with UCL thickness. CONCLUSION These findings suggest that UCL thickness increases as pitchers get older and heavier and as they increase their pitch volumes.
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Affiliation(s)
- Alfred Atanda
- Department of Orthopedic Surgery, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Lauren W Averill
- Department of Radiology, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Maegen Wallace
- Department of Orthopedic Surgery, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Tim A Niiler
- Department of Orthopedic Surgery, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Levon N Nazarian
- Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Michael G Ciccotti
- Department of Orthopedic Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania, USA.,Rothman Institute, Philadelphia, Pennsylvania, USA
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16
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Tomatsu S, Averill LW, Sawamoto K, Mackenzie WG, Bober MB, Pizarro C, Goff CJ, Xie L, Orii T, Theroux M. Obstructive airway in Morquio A syndrome, the past, the present and the future. Mol Genet Metab 2016; 117:150-6. [PMID: 26432669 PMCID: PMC4755902 DOI: 10.1016/j.ymgme.2015.09.007] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Revised: 09/18/2015] [Accepted: 09/18/2015] [Indexed: 11/28/2022]
Abstract
Patients with severe tracheal obstruction in Morquio A syndrome are at risk of dying of sleep apnea and related complications. Tracheal obstruction also leads to life-threatening complications during anesthesia as a result of the difficulty in managing the upper airway due to factors inherent to the Morquio A syndrome, compounded by the difficulty in intubating the trachea. A detailed description of the obstructive pathology of the trachea is not available in the literature probably due to lack of a homogenous group of Morquio A patients to study at any one particular center. We present a series of cases with significant tracheal obstruction who were unrecognized due to the difficulty in interpreting tracheal narrowing airway symptoms. Our goal is to provide the guidelines in the management of these patients that allow earlier recognition and intervention of tracheal obstruction. Sagittal MRI images of the cervical spine of 28 Morquio A patients (12±8.14years) showed that19/28 (67.9%) patients had at least 25% tracheal narrowing and that narrowing worsened with age (all 8 patients over 15years had greater than 50% narrowing). Eight out of 28 patients were categorized as severe (>75%) tracheal narrowing when images were evaluated in neutral head and neck position. Of the 19 patients with tracheal narrowing, compression by the tortuous brachiocephalic artery was the most common cause (n=15). Evidence of such tracheal narrowing was evident as early as at 2years of age. The etiology of tracheal impingement by the brachiocephalic artery in Morquio A appears to be due to a combination of the narrow thoracic inlet crowding structures and the disproportionate growth of trachea and brachiocephalic artery in relationship to the chest cavity leading to tracheal tortuosity. In conclusion, tracheal narrowing, often due to impression from the crossing tortuous brachiocephalic artery, increases with age in Morquio A patients. Greater attention to the trachea is needed when evaluating cervical spine MRIs as well as other imaging and clinical investigations, with the goal of establishing a timely treatment protocol to reduce the mortality rate in this patient population.
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Affiliation(s)
- Shunji Tomatsu
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, United States.
| | - Lauren W Averill
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, United States
| | - Kazuki Sawamoto
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, United States
| | - William G Mackenzie
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, United States
| | - Michael B Bober
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, United States
| | - Christian Pizarro
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, United States
| | - Christopher J Goff
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, United States
| | - Li Xie
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, United States
| | - Tadao Orii
- Department of Pediatrics, Gifu University, Gifu, Japan
| | - Mary Theroux
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, United States.
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17
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Guimaraes CV, DeFlorio RM, Averill LW, Walters KE, Beasley RA, Donnelly LF. Implementation of Standardized Reports Within a Pediatric Health Care System With Geographically Dispersed Sites. J Am Coll Radiol 2015; 12:1293-5. [DOI: 10.1016/j.jacr.2015.06.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 06/08/2015] [Accepted: 06/16/2015] [Indexed: 10/22/2022]
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18
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Averill LW, Kandula VVR, Akyol Y, Epelman M. Fetal Brain Magnetic Resonance Imaging Findings In Congenital Cytomegalovirus Infection With Postnatal Imaging Correlation. Semin Ultrasound CT MR 2015; 36:476-86. [PMID: 26614131 DOI: 10.1053/j.sult.2015.04.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Fetal brain magnetic resonance imaging (MRI) is a powerful tool in the diagnosis of symptomatic congenital cytomegalovirus infection, requiring a detailed search for specific features. A combination of anterior temporal lobe abnormalities, white matter lesions, and polymicrogyria is especially predictive. Fetal MRI may provide a unique opportunity to detect anterior temporal cysts and occipital horn septations, as dilation of these areas may decrease later in development. Cortical migration abnormalities, white matter abnormalities, cerebellar dysplasia, and periventricular calcifications are often better depicted on postnatal imaging but can also be detected on fetal MRI. We present the prenatal brain MRI findings seen in congenital cytomegalovirus infection and provide postnatal imaging correlation, highlighting the evolution of findings at different times in prenatal and postnatal developments.
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Affiliation(s)
- Lauren W Averill
- Department of Medical Imaging, Nemours/A.I. duPont Hospital for Children, Wilmington, DE.
| | - Vinay V R Kandula
- Department of Medical Imaging, Nemours/A.I. duPont Hospital for Children, Wilmington, DE
| | - Yakup Akyol
- Department of Medical Imaging, Nemours/A.I. duPont Hospital for Children, Wilmington, DE
| | - Monica Epelman
- Department of Radiology (Medical Imaging), Nemours Children׳s Hospital, Orlando, FL
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19
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Epelman M, Daneman A, Donnelly LF, Averill LW, Chauvin NA. Neonatal Imaging Evaluation of Common Prenatally Diagnosed Genitourinary Abnormalities. Semin Ultrasound CT MR 2014; 35:528-54. [DOI: 10.1053/j.sult.2014.07.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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20
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Abstract
Together, leukemia and lymphoma account for half of all childhood malignancies. Leukemia and lymphoma arise from similar cell lines and can have overlapping imaging features; however, the clinical presentation, imaging strategies, and treatment protocols can vary substantially based on the specific subtype. Although imaging does not play a central role in staging or monitoring disease in childhood leukemia, findings on imaging may be the first indication of the diagnosis. Advanced imaging, especially positron emission tomography/computed tomography, has moved to the forefront of staging and treatment response evaluation in Hodgkin's disease and non-Hodgkin's lymphoma. Imaging also plays a key role in evaluating the myriad of treatment complications that are commonly seen with chemotherapy and associated neutropenia. Future efforts will be largely focused on decreasing radiation exposure to these children, utilizing reduced or radiation-free modalities, such as positron emission tomography/magnetic resonance and diffusion-weighted whole-body imaging with background suppression, as well as refining surveillance imaging strategies. The purpose of this article is to briefly review the classification of pediatric leukemia and lymphoma, illustrate common imaging findings at presentation throughout the body, describe staging and therapeutic response evaluation, and show a spectrum of commonly encountered complications of treatment.
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Affiliation(s)
- Lauren W Averill
- Medical Imaging, Nemours/A.I. duPont Hospital for Children, Wilmington, DE.
| | - Gunsel Acikgoz
- Medical Imaging, Nemours/A.I. duPont Hospital for Children, Wilmington, DE
| | - Robin E Miller
- Nemours Center for Cancer and Blood Disorders, Nemours/A.I. duPont Hospital for Children, Wilmington, DE
| | - Vinay V R Kandula
- Medical Imaging, Nemours/A.I. duPont Hospital for Children, Wilmington, DE
| | - Monica Epelman
- Department of Medical Imaging, Nemours Children's Hospital, Orlando, FL
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21
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Averill LW, Stevenson KL, Kecskemethy HH, Reichard K, Datto GA, Grissom L. Pre- and postoperative imaging of adolescents undergoing laparoscopic adjustable gastric banding surgery. Pediatr Radiol 2012; 42:834-41. [PMID: 22419051 DOI: 10.1007/s00247-012-2363-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 12/21/2011] [Accepted: 01/13/2012] [Indexed: 11/28/2022]
Abstract
BACKGROUND As childhood obesity rates rise, laparoscopic adjustable gastric banding (LAGB) is being investigated as a bariatric surgical option in adolescents. OBJECTIVE To examine pre- and postoperative imaging in adolescents undergoing LAGB, describe the most common abnormal preoperative imaging findings, and illustrate the typical appearance and variants on postoperative upper-gastrointestinal (UGI) examinations. MATERIALS AND METHODS A retrospective chart review was performed of all adolescents from 2008 to 2010 undergoing LAGB at a single tertiary-care pediatric hospital. The picture archiving and communication system was queried for all imaging obtained before and after surgery. Postoperative UGI studies were analyzed for common patterns. RESULTS Twenty-seven obese adolescents who underwent LAGB were identified. Twenty-five had preoperative imaging, most commonly a UGI study (81.5%). Eight UGI studies were abnormal but did not impact surgery. Preoperative chest and neck radiographs were also common. Intraoperative imaging was rare. Seventy-three postoperative UGI studies were performed on 22 children (range, 2-12 studies). A common postoperative imaging pattern was observed in 19/22 (86%) children. No complications were observed. CONCLUSION The most common pre- and postoperative imaging studies in adolescents undergoing LAGB are UGI studies. Pediatric radiologists should be familiar with the imaging of LAGB as this procedure becomes increasingly common.
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Affiliation(s)
- Lauren W Averill
- Department of Medical Imaging, Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE 19803, USA.
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