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https://www.readbyqxmd.com/read/28327166/arthroscopic-findings-of-a-diagnostic-dilemma-hip-pathology-with-normal-imaging
#1
Joel Glenn Buikstra, Camdon Fary, Phong Tran
BACKGROUND: Patients with groin, hip and pelvic pain but normal findings on MRI and minimal changes on x-ray can be a diagnostic problem. This paper looks at the arthroscopic findings of patients who have had hip pain and a positive response to an intra-articular anaesthetic but have non-contributory imaging. We hypothesized that standard MRI's were missing significant pathology and if there was a response to intra-articular local anaesthesia, pathology found during arthroscopy was likely...
March 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28325425/treatment-of-scaphotrapeziotrapezoid-osteoarthritis-with-the-pyrocardan-%C3%A2-implant-results-with-a-minimum-follow-up-of-2-years
#2
E Gauthier, M-V Truffandier, E Gaisne, P Bellemère
The aim of this study was to report the results of arthroplasty using a mobile pyrocarbon implant (Pyrocardan(®)) for isolated scaphotrapeziotrapezoid (STT) osteoarthritis. The hypothesis was that this arthroplasty leads to functional improvement without carpal instability. Twenty patients (22 implants) were included with a minimum follow-up of 2 years and an average age of 59.6 years. Outcome criteria were pain (VAS scale), QuickDASH and PRWE scores, strength (grip and pinch), wrist mobility, the Kapandji index, carpal height and the capitolunar angle measured on X-rays...
April 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28323692/hyperlordosis-is-associated-with-facet-joint-pathology-at-the-lower-lumbar-spine
#3
Thorsten Jentzsch, James Geiger, Matthias A König, Clément M L Werner
STUDY DESIGN: A retrospective study. OBJECTIVE: Our study opted to clarify the remaining issues of lumbar lordosis (LL) with regard to (1) its physiological values, (2) age, (3) sex, and (4) facet joint (FJ) arthritis and orientation using computed tomography (CT) scans. SUMMARY OF BACKGROUND DATA: Recent studies have questioned whether LL really decreases with age, but study sample sizes have been rather small and mostly been based on x-rays...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28323691/mri-may-serve-as-a-valid-alternative-to-standing-radiography-in-evaluating-the-sagittal-alignment-of-the-upper-thoracic-spine
#4
Fei Wang, Xu Sun, Saihu Mao, Zhen Liu, Jun Qiao, Feng Zhu, Zezhang Zhu, Tao Pan, Ling Chen, Qinghua Zhao, Yong Qiu
STUDY DESIGN: This study is of a retrospective radiographic design. OBJECTIVE: The objective of the study was to compare supine magnetic resonance images (MRI) with standing x-ray scanning in the evaluation of the sagittal alignment of the upper thoracic spine. SUMMARY OF BACKGROUND DATA: X-ray films have been reported to be inaccurate in evaluating the proximal thoracic sagittal alignment because of poor visibility of the upper thoracic region...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28315662/insights-into-the-establishment-of-chromatin-states-in-pluripotent-cells-from-studies-of-x-inactivation
#5
REVIEW
Andreas Postlmayr, Anton Wutz
Animal development entails the sequential and coordinated specialisation of cells. During cell differentiation transcription factors, cell signalling pathways and chromatin associated protein complexes cooperate in regulating the expression of a large number of genes. Here we review the present understanding of the establishment of chromatin states by focusing on X chromosome inactivation (XCI) as a model for facultative heterochromatin formation in female embryonic cells. The inactive X chromosome (Xi) is large enough to be investigated by biochenical and microscopy techniques...
March 15, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28304320/optimal-radiologic-position-of-an-umbilical-venous-catheter-tip-as-determined-by-echocardiography-in-very-low-birth-weight-newborns
#6
B C F Karber, J Nielsen, D Balsam, C Messina, D Davidson
OBJECTIVE: To compare chest X-ray with echocardiogram (ECHO) in the localization of an umbilical venous catheter (UVC) tip in very low birth weight infants (VLBW). Secondary objectives determined the association between techniques for tip placement by the vertebral body level on X-ray, as well as the length of the thoracic inferior vena cava-right atrial (TIVC-RA) junction by ECHO. STUDY DESIGN: Prospective, sequentially enrolled, masked, single regional perinatal center study...
March 16, 2017: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/28301465/an-smc-like-protein-binds-and-regulates-caenorhabditis-elegans-condensins
#7
Lucy Fang-I Chao, Meha Singh, James Thompson, John R Yates, Kirsten A Hagstrom
Structural Maintenance of Chromosomes (SMC) family proteins participate in multisubunit complexes that govern chromosome structure and dynamics. SMC-containing condensin complexes create chromosome topologies essential for mitosis/meiosis, gene expression, recombination, and repair. Many eukaryotes have two condensin complexes (I and II); C. elegans has three (I, II, and the X-chromosome specialized condensin IDC) and their regulation is poorly understood. Here we identify a novel SMC-like protein, SMCL-1, that binds to C...
March 16, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28289634/long-term-outcome-and-factors-affecting-prognosis-of-extracorporeal-shockwave-therapy-for-chronic-refractory-achilles-tendinopathy
#8
Joon-Youn Lee, Kyungjae Yoon, Youbin Yi, Chul-Hyun Park, Jung-Sang Lee, Kyoung-Ho Seo, Young Sook Park, Yong-Taek Lee
OBJECTIVE: To investigate the factors affecting prognosis of extracorporeal shockwave therapy (ESWT) for chronic refractory Achilles tendinopathy (AT). METHODS: Thirty-six patients (48 consecutive feet) with chronic AT (>6 months) and who underwent ESWT for 'poor' or 'fair' grade in Roles-Maudsley Score (RMS) after unsuccessful conservative treatment were included in the present study. A maximum of 12 sessions of ESWT were conducted until treatment success: RMS reached 'good' or 'excellent'...
February 2017: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28287011/follow-up-after-initial-surgical-treatment-of-soft-tissue-sarcomas-in-the-extremities-and-trunk-wall
#9
Thea Bechmann Hovgaard, Tine Nymark, Ole Skov, Michael Mørk Petersen
BACKGROUND/OBJECTIVES: Evaluation of our surveillance program for soft tissue sarcomas (STS) and borderline tumors (BT) for identification of local recurrence and lung metastases the first 2 years postoperatively. METHODS: We retrospectively assessed the medical files of all patients (n = 232) with STS and BT of the extremities and trunk wall who underwent surgery from 2010 to 2013. Two-hundred-and-thirty-two patients were included in the local recurrence study and 116 patients in the lung metastasis study...
March 13, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28281191/lumbar-interbody-fusion-with-utilization-of-recombinant-human-bone-morphogenetic-protein-a-retrospective-real-life-study-about-277-patients
#10
Stéphane Litrico, Tristan Langlais, Florent Pennes, Antoine Gennari, Philippe Paquis
The purpose of this study was to report an independent real-life experience about the use of recombinant human bone morphogenetic protein 2 in lumbar interbody fusion with a special focus on complications. This is a retrospective single-center cohort study between 2007 and 2013 including 277 patients treated for anterior or posterior lumbar fusion with recombinant human bone morphogenetic protein 2. We report the complications occurring during the 12 first postoperative months and analyze the fusion rate on X-rays...
March 10, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28275167/novel-opsin-gene-variation-in-large-bodied-diurnal-lemurs
#11
Rachel L Jacobs, Tammie S MacFie, Amanda N Spriggs, Andrea L Baden, Toni Lyn Morelli, Mitchell T Irwin, Richard R Lawler, Jennifer Pastorini, Mireya Mayor, Runhua Lei, Ryan Culligan, Melissa T R Hawkins, Peter M Kappeler, Patricia C Wright, Edward E Louis, Nicholas I Mundy, Brenda J Bradley
Some primate populations include both trichromatic and dichromatic (red-green colour blind) individuals due to allelic variation at the X-linked opsin locus. This polymorphic trichromacy is well described in day-active New World monkeys. Less is known about colour vision in Malagasy lemurs, but, unlike New World monkeys, only some day-active lemurs are polymorphic, while others are dichromatic. The evolutionary pressures underlying these differences in lemurs are unknown, but aspects of species ecology, including variation in activity pattern, are hypothesized to play a role...
March 2017: Biology Letters
https://www.readbyqxmd.com/read/28265719/health-state-utility-values-and-patient-reported-outcomes-before-and-after-vertebral-and-non-vertebral-fractures-in-an-osteoporosis-clinical-trial
#12
T Imai, S Tanaka, K Kawakami, T Miyazaki, H Hagino, M Shiraki
We assessed the health state utility value (HSUV) reductions associated with vertebral fractures using data collected in the Japanese Osteoporosis Intervention Trial-03 (JOINT-03). Our analysis revealed that assessment of HSUVs after morphometric vertebral fracture is important to capture the burden of vertebral fractures. INTRODUCTION: Evaluation of the HSUV after fracture is important to calculate the quality-adjusted life years (QALYs) of osteoporosis patients, which is essential information in the context of health economic evaluation...
March 6, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28257538/multidisciplinary-approach-to-complicated-pregnancy
#13
Josip Andelo Borovac, Josko Bozic, Tina Ticinovic Kurir, Nikola Zaja, Kresimir Kolic, Vedran Hrboka
A nulliparous pregnant woman in her mid-20s and in the 32nd week of gestation presented to the emergency department with severe headache and vomiting. She had an uneventful medical history; however, the physical examination upon hospital admission revealed a hypertensive emergency, papilledema, and 2+ dipstick proteinuria. Upon establishing the diagnosis of preeclampsia, aggressive therapy with corticosteroids, antihypertensive medication, and seizure prophylaxis was initiated. Hemodynamic stability was achieved within 24 hours and the patient remained in the observation unit located within the gynecology clinic...
March 2017: Southern Medical Journal
https://www.readbyqxmd.com/read/28253835/abdominal-aortic-calcification-on-a-plain-x-ray-and-the-relation-with-significant-coronary-artery-disease-in-asymptomatic-chronic-dialysis-patients
#14
M K de Bie, M S Buiten, J I Rotmans, M Hogenbirk, M J Schalij, T J Rabelink, J W Jukema
BACKGROUND: Coronary artery disease (CAD) is common in asymptomatic chronic dialysis patients and plays an important role in their poor survival. Early identification of these high-risk patients could improve treatment and reduce mortality. Abdominal aortic calcification (AAC) has previously been associated with CAD in autopsy studies. Since the AAC can be quantified easily using a lateral lumbar X-ray we hypothesized that the extent of AAC as assessed on a lateral lumbar X-ray might be predictive of the presence of significant CAD in dialysis patients...
March 2, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28248317/perfect-x-ray-focusing-via-fitting-corrective-glasses-to-aberrated-optics
#15
Frank Seiboth, Andreas Schropp, Maria Scholz, Felix Wittwer, Christian Rödel, Martin Wünsche, Tobias Ullsperger, Stefan Nolte, Jussi Rahomäki, Karolis Parfeniukas, Stylianos Giakoumidis, Ulrich Vogt, Ulrich Wagner, Christoph Rau, Ulrike Boesenberg, Jan Garrevoet, Gerald Falkenberg, Eric C Galtier, Hae Ja Lee, Bob Nagler, Christian G Schroer
Due to their short wavelength, X-rays can in principle be focused down to a few nanometres and below. At the same time, it is this short wavelength that puts stringent requirements on X-ray optics and their metrology. Both are limited by today's technology. In this work, we present accurate at wavelength measurements of residual aberrations of a refractive X-ray lens using ptychography to manufacture a corrective phase plate. Together with the fitted phase plate the optics shows diffraction-limited performance, generating a nearly Gaussian beam profile with a Strehl ratio above 0...
March 1, 2017: Nature Communications
https://www.readbyqxmd.com/read/28242140/mri-guided-lung-sbrt-present-and-future-developments
#16
REVIEW
Martin J Menten, Andreas Wetscherek, Martin F Fast
Stereotactic body radiotherapy (SBRT) is rapidly becoming an alternative to surgery for the treatment of early-stage non-small cell lung cancer patients. Lung SBRT is administered in a hypo-fractionated, conformal manner, delivering high doses to the target. To avoid normal-tissue toxicity, it is crucial to limit the exposure of nearby healthy organs-at-risk (OAR). Current image-guided radiotherapy strategies for lung SBRT are mostly based on X-ray imaging modalities. Although still in its infancy, magnetic resonance imaging (MRI) guidance for lung SBRT is not exposure-limited and MRI promises to improve crucial soft-tissue contrast...
February 24, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28238247/dysfunction-of-an-on-x-heart-valve-by-pannus
#17
Cipriano Abad, Stefano Urso, Elsa Gomez, Maria De la Vega
A 68-year-old woman with a history of previous double-valve replacement with On-X mechanical heart valves presented with clinical, echocardiographic and cardiac catheterization signs of obstruction of the On-X tricuspid heart valve prosthesis. The patient was successfully reoperated, but at surgery the valve was seen to be invaded by an abnormal overgrowth of pannus that blocked one of the leaflets. A small amount of non-obstructive fresh thrombus was also observed. The valve was successfully replaced with a biological heart valve prosthesis...
September 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28236072/differences-in-limb-alignment-and-femoral-mechanical-anatomical-angles-using-two-dimension-versus-three-dimension-radiographic-imaging
#18
Frédéric Sailhan, Louis Jacob, Moussa Hamadouche
PURPOSE: The purpose of this study was to compare the femoral mechanical-anatomical (FMA) and mechanical femoro-tibial (MFT) angles in an osteoarthritic population using the 2D (two dimension) and the 3D (three dimension) EOS low-dose biplanar radiographic system (EOS). METHODS: FMA and MFT angles were calculated in 127 adults with osteoarthritis. In 2D, FMA angle was measured between the femoral mechanical axis and the femoral anatomical axis, and MFT angle between the femoral mechanical axis and the tibial mechanical axis...
February 24, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28228904/bone-scan-findings-in-calcific-tendinitis-at-the-gluteus-maximus-insertion-some-illustrative-cases
#19
Karel Van Damme, Liesbeth De Coster, Koen Mermuys, Anja Van den Eeckhaut, Natascha Walgraeve, Frank De Geeter
We describe the bone scan and single-photon emission computed tomography/computed tomography findings in calcific tendinitis of the gluteus maximus and discuss its pathophysiology. Although this tendinopathy is mostly self-limiting, awareness of this disease is important for 2 reasons. First, it may explain acute hip symptoms in patients in the resorptive phase of the calcifications. Second, it should be considered as a differential diagnosis for bone scan hot spots in the vicinity of the gluteus maximus tendon and for cortical erosion seen in that region on X-rays or CT...
March 2017: Radiology case reports
https://www.readbyqxmd.com/read/28220403/dosimetry-in-mars-spectral-ct-topas-monte-carlo-simulations-and-ion-chamber-measurements
#20
Gray Lu, Steven Marsh, Jerome Damet, Pierre Carbonez, John Laban, Christopher Bateman, Anthony Butler, Phil Butler
Spectral computed tomography (CT) is an up and coming imaging modality which shows great promise in revealing unique diagnostic information. Because this imaging modality is based on X-ray CT, it is of utmost importance to study the radiation dose aspects of its use. This study reports on the implementation and evaluation of a Monte Carlo simulation tool using TOPAS for estimating dose in a pre-clinical spectral CT scanner known as the MARS scanner. Simulated estimates were compared with measurements from an ionization chamber...
February 20, 2017: Australasian Physical & Engineering Sciences in Medicine
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