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Clinical Densitometry

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https://www.readbyqxmd.com/read/27886084/intracranial-thrombus-morphology-and-composition-undergoes-time-dependent-changes-in-acute-ischemic-stroke-a-ct-densitometry-study
#1
Slaven Pikija, Jozef Magdic, Vladimir Trkulja, Peter Unterkreuter, Johannes Sebastian Mutzenbach, Helmut F Novak, Friedrich Weymayr, Larissa Hauer, Johann Sellner
The aim of our study was to assess whether cerebral artery clots undergo time-dependent morphological and compositional changes in acute ischemic stroke. We performed a retrospective chart review of patients admitted within 5 h from symptom onset to three European stroke centers and evaluated non-contrast-enhanced CT (NECT) for hyperdense artery signs (HAS) in 2565 scans. The occlusion site, density of HAS expressed in Hounsfield units (HU), area of HAS, and relative density (rHU) (HU clot/HU non-affected artery) were studied and related to time from symptom onset, clinical severity, stroke etiology, and laboratory parameters...
November 23, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27881164/administration-of-anti-receptor-activator-of-nuclear-factor-kappa-b-ligand-rankl-antibody-for-the-treatment-of-osteoporosis-was-associated-with-amelioration-of-hepatitis-in-a-female-patient-with-growth-hormone-deficiency-a-case-report
#2
Ayumu Takeno, Masahiro Yamamoto, Masakazu Notsu, Toshitsugu Sugimoto
BACKGROUND: Growth hormone deficiency (GHD) is associated with non-alcoholic fatty liver disease (NAFLD). A recent animal study showed that hepatocyte-specific receptor activator of nuclear factor-kappa B (RANK) knockout mice had significantly lower liver fat content compared with control mice concomitant with a decrease in production of inflammatory cytokines such as tumor necrosis factor-α (TNF-α) from hepatocytes and kupffer cells. The role of anti-RANK ligand (RANKL) antibody for osteoporosis on hepatitis in patients with aGHD is still unknown...
November 24, 2016: BMC Endocrine Disorders
https://www.readbyqxmd.com/read/27870622/dual-energy-ct-for-the-musculoskeletal-system
#3
Paul I Mallinson, Tyler M Coupal, Patrick D McLaughlin, Savvas Nicolaou, Peter L Munk, Hugue A Ouellette
The principal advantages of dual-energy computed tomography (CT) over conventional CT in the musculoskeletal setting relate to the additional information provided regarding tissue composition, artifact reduction, and image optimization. This article discusses the manifestations of these in clinical practice-urate and bone marrow edema detection, metal artifact reduction, and tendon analysis, with potential in arthrography, bone densitometry, and metastases surveillance. The basic principles of dual-energy CT physics and scanner design will also be discussed...
December 2016: Radiology
https://www.readbyqxmd.com/read/27843230/preclinical-cataract-masquerading-as-post-lasik-regression
#4
Rohit Shetty, Nikhil Negalur, Mathew Kurian, Rushad Shroff
The purpose of this case report is to bring forth a rare clinical scenario where preclinical cataract mimics post-LASIK regression and to describe the role of aberrometry in detecting higher order aberrations (HOAs) and early lens changes. A 36-year-old female presented with blurring of vision since 1 year after having undergone an uneventful LASIK surgery 3 years prior. Corneal topography and aberrometry were within normal limits. Although the lens was morphologically normal on slit lamp examination, increased HOAs and lenticular density were detected...
September 2016: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/27836529/twelve-years-of-experience-with-miglustat-in-the-treatment-of-type-1-gaucher-disease-the-spanish-zagal-project
#5
Pilar Giraldo, Marcio Andrade-Campos, Pilar Alfonso, Pilar Irun, Koldo Atutxa, Antonio Acedo, Abelardo Barez, Margarita Blanes, Vicente Diaz-Morant, Ma Angeles Fernández-Galán, Rafael Franco, Cristina Gil-Cortes, Vicente Giner, Angela Ibañez, Paz Latre, Ines Loyola, Elisa Luño, Roberto Hernández-Martin, Blanca Medrano-Engay, José Puerta, Inmaculada Roig, Javier de la Serna, Olga Salamero, Lucia Villalón, Miguel Pocovi
We report data from a prospective, observational study (ZAGAL) evaluating miglustat 100mg three times daily orally. in treatment-naïve patients and patients with type 1 Gaucher Disease (GD1) switched from previous enzyme replacement therapy (ERT). Clinical evolution, changes in organ size, blood counts, disease biomarkers, bone marrow infiltration (S-MRI), bone mineral density by broadband ultrasound densitometry (BMD), safety and tolerability annual reports were analysed. Between May 2004 and April 2016, 63 patients received miglustat therapy; 20 (32%) untreated and 43 (68%) switched...
October 24, 2016: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/27824385/corneal-scheimpflug-densitometry-following-photorefractive-keratectomy-in-myopic-eyes
#6
Marie Boulze-Pankert, Romuald Dariel, Louis Hoffart
PURPOSE: To evaluate the modification of corneal optical densitometry following photorefractive keratectomy (PRK) using Scheimpflug topography. METHODS: Corneal densitometry (0 to 100 grayscale units [GSU]), pachymetry, and keratometry were evaluated using a rotating Scheimpflug camera (Pentacam HR; Oculus Optikgeräte, GmbH, Wetzlar, Germany) at baseline and 1 and 3 months following PRK in myopic patients. Subjective refraction, uncorrected distance visual acuity, corrected distance visual acuity, and corneal haze (0 to 4 on common subjective scale) were evaluated preoperatively at baseline, 1 month, and 3 months...
November 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27814296/early-evidence-of-low-bone-density-and-decreased-serotonergic-synthesis-in-the-dorsal-raphe-of-a%C3%A2-tauopathy-model-of-alzheimer-s-disease
#7
Christine M Dengler-Crish, Matthew A Smith, Gina N Wilson
Reduced bone mineral density (BMD) and its clinical sequelae, osteoporosis, occur at a much greater rate the rate in patients with Alzheimer's disease (AD), often emerging early in the disease before significant cognitive decline is seen. Reduced BMD translates to increased bone fracture risk, decreased quality of life, and increased mortality for AD patients. However, the mechanism responsible for this observation is unclear. We hypothesize that bone loss is an additional component of an AD prodrome, changes that emerge prior to dementia and are mediated by dysfunction of the central serotonergic pathways...
November 3, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27797988/cross-sectional-and-longitudinal-study-protocols-of-the-adiposity-and-bone-metabolism-effects-of-exercise-induced-weight-loss-in-obese-adolescents-adibox-project
#8
Elodie Chaplais, Frédéric Dutheil, Geraldine Naughton, David Greene, Bruno Pereira, David Thivel, Daniel Courteix
INTRODUCTION: A need exists for sustainable and clinically effective weight management interventions, suitable for preventing well-linked chronic disease such as diabetes and cardiovascular disease and some less investigated secondary conditions such as bone alteration. The ADIposity and BOne metabolism: effects of eXercise-induced weight loss in obese adolescents (ADIBOX) protocol was designed to provide a better understanding of the interaction between adipokines and bone hormones in adolescents with obesity and how a 10-month physical activity programme may affect these interactions...
October 18, 2016: BMJ Open
https://www.readbyqxmd.com/read/27756092/parathyroid-hormone-polymorphism-rs6254-is-associated-with-the-development-and-severity-of-osteoporosis-in-asymptomatic-but-not-normocalcemic-hyperthyroidism
#9
G Díaz-Soto, E Romero, J L Pérez-Castrillón, O I Jauregui, D de Luis Román
Although normocalcemic and asymptomatic hyperparathyroidism (HPT) are becoming more common, they remain only partially understood. Parathyroid hormone (PTH) polymorphisms have been associated with disease severity in classical HPT. The aim of the present study was to evaluate the clinical effect of PTH polymorphism (rs6254) in normocalcemic and asymptomatic HPT. A prospective study of 61 consecutive patients with normocalcemic or asymptomatic HPT was carried out. Secondary causes of HPT were ruled out. All patients were followed for≥1 year...
October 18, 2016: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/27743070/african-americans-have-lower-tbs-than-whites-among-densitometry-patients-at-a-chicago-academic-center
#10
R K Jain, T J Vokes
: Trabecular bone score, an indirect measure of bone structure, may differ between ethnicities. We found that African Americans had lower trabecular bone score than do whites referred for densitometry, even when controlling for age and abdominal soft tissue thickness. PURPOSE: Trabecular bone score (TBS), an indirect measure of bone structure, has been shown to predict fractures in predominantly white populations. Analysis of NHANES data revealed lower TBS in African Americans than in whites...
October 14, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27741541/bone-densitometry-in-children
#11
Judith E Adams
Maximizing peak bone mass in childhood is relevant to optimizing bone health in later life, so the study of the skeleton in children in health and disease is important. Dual-energy X-ray absorptiometry (DXA) is the most widely used clinical tool for the assessment of bone status in children. Technological developments in DXA enable vertebral fracture assessment at much lower ionizing radiation doses than spinal radiographs. Quantitative computed tomography remains predominantly a research tool but has some advantages over DXA in not being size dependent...
July 2016: Seminars in Musculoskeletal Radiology
https://www.readbyqxmd.com/read/27737446/expression-of-%C3%AE-adrenergic-receptor-subtypes-in-proliferative-involuted-and-propranolol-responsive-infantile-hemangiomas
#12
James D Phillips, Haihong Zhang, Ting Wei, Gresham T Richter
Importance: Propranolol hydrochloride has become the primary medical treatment for problematic infantile hemangioma; however, the expression of propranolol's target receptors during growth, involution, and treatment of hemangioma remains unclear. Objective: To measure and compare the expression of β1-, β2-, and β3-adrenergic receptors (ADBR1, ADBR2, and ADBR3, respectively) in proliferative (n = 10), involuted (n = 11), and propranolol-responsive (n = 12) hemangioma tissue...
October 13, 2016: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/27670687/peripheral-quantitative-computed-tomography-pqct-for-the-assessment-of-bone-strength-in-most-of-bone-affecting-conditions-in-developmental-age-a-review
#13
Stefano Stagi, Loredana Cavalli, Tiziana Cavalli, Maurizio de Martino, Maria Luisa Brandi
Peripheral quantitative computed tomography provides an automatical scan analysis of trabecular and cortical bone compartments, calculating not only their bone mineral density (BMD), but also bone geometrical parameters, such as marrow and cortical Cross-Sectional Area (CSA), Cortical Thickness (CoTh), both periosteal and endosteal circumference, as well as biomechanical parameters like Cross-Sectional Moment of Inertia (CSMI), a measure of bending, polar moment of inertia, indicating bone strength in torsion, and Strength Strain Index (SSI)...
September 26, 2016: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/27669735/bone-densitometry-in-children-and-adolescents
#14
Laura K Bachrach, Catherine M Gordon
Concerns about bone health and potential fragility in children and adolescents have led to a high interest in bone densitometry. Pediatric patients with genetic and acquired chronic diseases, immobility, and inadequate nutrition may fail to achieve expected gains in bone size, mass, and strength, leaving them vulnerable to fracture. In older adults, bone densitometry has been shown to predict fracture risk and reflect response to therapy. The role of densitometry in the management of children at risk of bone fragility is less clear...
September 26, 2016: Pediatrics
https://www.readbyqxmd.com/read/27662240/american-association-of-clinical-endocrinologists-and-american-college-of-endocrinology-clinical-practice-guidelines-for-the-diagnosis-and-treatment-of-postmenopausal-osteoporosis-2016
#15
Pauline M Camacho, Steven M Petak, Neil Binkley, Bart L Clarke, Steven T Harris, Daniel L Hurley, Michael Kleerekoper, E Michael Lewiecki, Paul D Miller, Harmeet S Narula, Rachel Pessah-Pollack, Vin Tangpricha, Sunil J Wimalawansa, Nelson B Watts
AACE = American Association of Clinical Endocrinologists AFF = atypical femur fracture ASBMR = American Society for Bone and Mineral Research BEL = best evidence level BMD = bone mineral density BTM = bone turnover marker CBC = complete blood count CI = confidence interval DXA = dual-energy X-ray absorptiometry EL = evidence level FDA = U.S. Food and Drug Administration FLEX = Fracture Intervention Trial (FIT) Long-term Extension FRAX(®) = Fracture Risk Assessment Tool GFR = glomerular filtration rate GI = gastrointestinal HORIZON = Health Outcomes and Reduced Incidence with Zoledronic Acid Once Yearly IOF = International Osteoporosis Foundation ISCD = International Society for Clinical Densitometry IU = international units IV = intravenous LSC = least significant change NBHA = National Bone Health Alliance NOF = National Osteoporosis Foundation 25(OH)D = 25-hydroxy vitamin D ONJ = osteonecrosis of the jaw PINP = serum carboxy-terminal propeptide of type I collagen PTH = parathyroid hormone R = recommendation RANK = receptor activator of nuclear factor kappa-B RANKL = receptor activator of nuclear factor kappa-B ligand RCT = randomized controlled trial RR = relative risk S-CTX = serum C-terminal telopeptide SQ = subcutaneous VFA = vertebral fracture assessment WHO = World Health Organization...
September 2, 2016: Endocrine Practice
https://www.readbyqxmd.com/read/27643923/american-association-of-clinical-endocrinologists-and-american-college-of-endocrinology-clinical-practice-guidelines-for-the-diagnosis-and-treatment-of-postmenopausal-osteoporosis-2016-executive-summary
#16
Pauline M Camacho, Steven M Petak, Neil Binkley, Bart L Clarke, Steven T Harris, Daniel L Hurley, Michael Kleerekoper, E Michael Lewiecki, Paul D Miller, Harmeet S Narula, Rachel Pessah-Pollack, Vin Tangpricha, Sunil J Wimalawansa, Nelson B Watts
AACE = American Association of Clinical Endocrinologists AFF = atypical femur fracture ASBMR = American Society for Bone and Mineral Research BEL = best evidence level BMD = bone mineral density BTM = bone turnover marker CBC = complete blood count CI = confidence interval DXA = dual-energy X-ray absorptiometry EL = evidence level FDA = U.S. Food and Drug Administration FLEX = Fracture Intervention Trial (FIT) Long-term Extension FRAX(®) = Fracture Risk Assessment Tool GFR = glomerular filtration rate GI = gastrointestinal HORIZON = Health Outcomes and Reduced Incidence with Zoledronic Acid Once Yearly IOF = International Osteoporosis Foundation ISCD = International Society for Clinical Densitometry IU = international units IV = intravenous LSC = least significant change NBHA = National Bone Health Alliance NOF = National Osteoporosis Foundation 25(OH)D = 25-hydroxy vitamin D ONJ = osteonecrosis of the jaw PINP = serum carboxy-terminal propeptide of type I collagen PTH = parathyroid hormone R = recommendation RANK = receptor activator of nuclear factor kappa-B RANKL = receptor activator of nuclear factor kappa-B ligand RCT = randomized controlled trial RR = relative risk S-CTX = serum C-terminal telopeptide SQ = subcutaneous VFA = vertebral fracture assessment WHO = World Health Organization...
September 2016: Endocrine Practice
https://www.readbyqxmd.com/read/27616291/bone-mass-outcomes-in-patients-with-osteoporosis-treated-with-risedronate-after-alendronate-failure-a-12-month-follow-up-study
#17
Leonardo Teixeira Mendonça, Marcelo Medeiros Pinheiro, Vera Lúcia Szejnfeld, Charlles Heldan de Moura Castro
Oral bisphosphonates are the drugs most frequently used for the treatment of osteoporosis. Clinicians usually switch between these drugs in clinical practice based on differences in efficacy. We aim to investigate the reasons associated with switching between oral bisphosphonates and to evaluate bone mass response and the incidence of fractures 12 mo after the exchange in a cohort of patients with osteoporosis seen at a tertiary hospital. Patients with osteoporosis who switched between oral bisphosphonates between January 2007 and December 2014 were included...
September 5, 2016: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/27614576/bone-health-measures-in-glucocorticoid-treated-ambulatory-boys-with-duchenne-muscular-dystrophy
#18
Cuixia Tian, Brenda L Wong, Lindsey Hornung, Jane C Khoury, Lauren Miller, Jean Bange, Irina Rybalsky, Meilan M Rutter
Osteoporosis is a major problem in boys with Duchenne Muscular Dystrophy (DMD), attributable to muscle weakness and glucocorticoid therapy. Consensus regarding bone health assessment and management is lacking. Lumbar spine areal bone mineral density by dual-energy X-ray absorptiometry (DXA) is frequently the primary measure used, but has limitations for boys with DMD. We retrospectively studied 292 ambulant glucocorticoid-treated boys with DMD categorized by functional mobility score, FMS 1, 2 or 3. We assessed DXA whole body and lumbar spine areal bone mineral density and content Z-scores adjusted for age and height, lateral distal femur areal bone mineral density Z-scores, frequency of fractures, and osteoporosis by International Society for Clinical Densitometry 2013 criteria...
August 22, 2016: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/27591444/-estimation-of-mandibular-bone-status-and-lumbar-bone-mineral-density-in-postmenopausal-women
#19
Maciej Stagraczyński, Tomasz Kulczyk, Agnieszka Podfigurna, Błażej Męczekalski
UNLABELLED: Osteoporosis is a serious health problem among postmenopausal women. Many clinical studies have shown a correlation between low bone mineral density (BMD) parameters of spinal column, hip and bone status of mandible. AIM: The aim of the study was to compare the status of mandibular bone and the lumbar part of the spine in postmenopausal women with osteoporosis, osteopenia and normal BMD. MATERIALS AND METHODS: 47 postmenopausal women (mean age 54...
August 2016: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/27591052/corneal-densitometry-as-a-novel-technique-for-monitoring-amiodarone-therapy
#20
Maged Alnawaiseh, Lars Zumhagen, Sven Zumhagen, Lea Schulte, André Rosentreter, Friederike Schubert, Nicole Eter, Gerold Mönnig
PURPOSE: The clinical efficacy and toxicity of amiodarone may be determined more effectively by tissue deposition than by levels of the agent in serum. Therefore, corneal densitometry might be useful for therapeutic monitoring. The aim of the study is to evaluate Scheimpflug corneal densitometry in patients with amiodarone keratopathy (AK). DESIGN: Comparative case series. PARTICIPANTS: Sixty-six patients receiving amiodarone therapy and 66 healthy controls were consecutively enrolled in this study...
August 30, 2016: Ophthalmology
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