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https://www.readbyqxmd.com/read/28529661/slipped-capital-femoral-epiphysis-management-and-the-arthroscope
#1
F Accadbled, O May, C Thévenin-Lemoine, J Sales de Gauzy
BACKGROUND: In situ pinning of slipped capital femoral epiphysis (SCFE) results in various degrees of deformity of the femoral head-neck junction. Repetitive trauma from cam-type femoroacetabular impingement (FAI) can lead to labral tears and injury to the articular cartilage causing loss of function. Arthroscopic osteoplasty is an alternative to open procedure and to Southwick/Imhäuser-type osteotomies in symptomatic selected cases. SURGICAL TECHNIQUE: The amount of bone to be resected has to be carefully planned pre-operatively...
April 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28513173/the-photophysics-of-deoxycytidine-and-5-methyl-deoxycytidine-in-solution-a-comprehensive-picture-by-quantum-mechanical-calculations-and-femtosecond-fluorescence-spectroscopy
#2
Lara Martinez-Fernandez, Ana J Pepino, Javier Segarra-Martí, Justina Jovaisaite, Ignacio Vayá, Artur Nenov, Dimitra Markovitsi, Thomas Gustavsson, Akos Banyasz, Marco Garavelli, Roberto Improta
The study concerns the relaxation of electronic excited states of the DNA nucleoside Deoxycytidine (dCyd) and its methylated analogue 5-methyl-deoxycytidine (5mdCyd), known to be involved in the formation of UV-induced lesions of the genetic code. Due to the existence of four closely lying and potentially coupled excited states, the deactivation pathways in these systems are particularly complex and have not been assessed so far. Here, we provide a complete mechanistic picture of the excited state relaxation of dCyd/5mdCyd in three solvents, water, acetonitrile, and tetrahydrofuran by combining femtosecond fluorescence experiments, addressing the effect of solvent proticity on the relaxation dynamics of dCyd and 5mdCyd for the first time, and two complementary Quantum Mechanical approaches (CASPT2/MM and PCM/TD-CAM-B3LYP)...
May 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28504915/prevalence-of-os-styloideum-in-national-hockey-league-players
#3
Harry G Greditzer, Ian D Hutchinson, Christian S Geannette, Robert N Hotchkiss, Bryan T Kelly, Hollis G Potter
BACKGROUND: Os styloideum describes an accessory carpal ossicle between the trapezoid, the capitate, and the second and third metacarpals. Injuries to this tissue have been described as part of the carpal boss syndrome. While the etiology of os styloideum remains uncertain, it may represent a physiologic response to altered loading forces in the wrist, similar to the development of cam-type deformity in the hips of ice hockey players or the Bennett lesion in the shoulders of baseball pitchers...
May 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28476053/transmission-of-donor-derived-breast-carcinoma-as-a-recurrent-mass-in-a-keratolimbal-allograft
#4
Audra K Miller, Jonathan W Young, David J Wilson, Jennifer Dunlap, Winston Chamberlain
PURPOSE: To report a case of local transmission of invasive lobular carcinoma from a donor to a recipient in a keratolimbal allograft after cessation of systemic immunosuppressive therapy. METHODS: This is a case report including the clinicopathologic findings. Sections of the donor breast tumor and recipient conjunctival lesions were stained with hematoxylin and eosin. Immunohistochemical studies were performed using pancytokeratin, CK7, CK20, CAM 5.2, CD138, TTF1, estrogen receptor, progesterone receptor, GATA-3, GCDFP-15, and mammaglobin...
June 2017: Cornea
https://www.readbyqxmd.com/read/28446137/progressive-cutaneous-cryptococcosis-complicated-with-meningitis-in-a-myasthenia-gravis-patient-on-long-term-immunosuppressive-therapy-a-case-report
#5
Nguyen Thi Cam Huong, Ahmed M A Altibi, Nguyen My Hoa, Le Anh Tuan, Samar Salman, Sara Morsy, Nguyen Thi Bich Lien, Nguyen Thanh Truong, Nguyen Thi Hoang Mai, Pham Thi Le Hoa, Nguyen Ba Thang, Van The Trung
BACKGROUND: Cryptococcosis is an opportunistic infection caused by the encapsulated yeast Cryptococcus neoformans and most remarkably manifests in HIV-infected individuals, especially in the settings of very low CD4 count. Development of cryptococcosis in HIV-uninfected individuals is exceedingly rare and usually signifies a marked immunodeficiency. Cryptococcosis in association with myasthenia gravis or thymoma has been previously documented in only very few cases in the literature. CASE PRESENTATION: We reported a complicated case of severe cutaneous cryptococcosis in a 39-year-old Vietnamese male patient with myasthenia gravis on long-term immunosuppressive therapy...
April 26, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28435197/development-of-nested-polymerase-chain-reaction-based-diagnosis-of-duck-enteritis-virus-and-detection-of-dna-polymerase-gene-from-non-descriptive-duck-breeds-of-west-bengal-india
#6
Partha Sarathi Mandal, Sunit Kumar Mukhopadhayay, Saktipada Pradhan, Samiran Mondal, Chandrakanta Jana, Nimai Chandra Patra, Rabindra Nath Hansda
AIM: The study was undertaken to detect the clinical signs, postmortem lesions of embryonated duck plague (DP) infected eggs, and histopathological changes of chorioallantoic membrane (CAM) in non-descriptive ducks of West Bengal with special reference to standardize nested polymerase chain reaction (PCR). MATERIALS AND METHODS: After postmortem of suspected carcasses, samples were collected for virus isolation and identification through specific pathogen free (Khaki Campbell) embryonated duck eggs...
March 2017: Veterinary World
https://www.readbyqxmd.com/read/28422359/clinical-evaluation-of-indirect-particle-filled-composite-resin-cad-cam-partial-crowns-after-24-months
#7
Moritz Zimmermann, Christina Koller, Marcel Reymus, Albert Mehl, Reinhard Hickel
PURPOSE: Resin-based CAD/CAM compound materials might be promising for single-tooth restorations. Insufficient clinical data are available for this new material class. The purpose of this study was to describe initial clinical in vivo results for indirect particle-filled composite resin CAD/CAM restorations after 24 months. MATERIALS AND METHODS: Indirect particle-filled composite resin restorations were fabricated with a CAD/CAM method (CEREC Bluecam intraoral scanner, CEREC MCXL milling unit) by calibrated dental students...
April 19, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28372702/editorial-commentary-hip-femoroacetabular-impingement-correction-risk-versus-reward-or-how-much-is-too-much
#8
EDITORIAL
J W Thomas Byrd
When performing arthroscopic surgical management of symptomatic cases of hip femoroacetabular impingement (FAI), it is important to consider how much cam lesion resection is required, if any. Generally, failure to adequately address a cam lesion could result in progressive damage to the articular cartilage. Thus, while it is important to consider exactly how much arthroscopic intervention is necessary to achieve successful results, the potential consequences of neglecting a cam lesion are at least as worrisome as the risks of indicated cam lesion treatment...
April 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28342138/does-removal-of-subchondral-cortical-bone-provide-sufficient-resection-depth-for-treatment-of-cam-femoroacetabular-impingement
#9
Penny R Atkins, Stephen K Aoki, Ross T Whitaker, Jeffrey A Weiss, Christopher L Peters, Andrew E Anderson
BACKGROUND: Residual impingement resulting from insufficient resection of bone during the index femoroplasty is the most-common reason for revision surgery in patients with cam-type femoroacetabular impingement (FAI). Development of surgical resection guidelines therefore could reduce the number of patients with persistent pain and reduced ROM after femoroplasty. QUESTIONS/PURPOSES: We asked whether removal of subchondral cortical bone in the region of the lesion in patients with cam FAI could restore femoral anatomy to that of screened control subjects...
March 24, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28326214/open-and-arthroscopic-with-mini-open-surgical-hip-approaches-for-treatment-of-pigmented-villonodular-synovitis-and-concomitant-hip-pathology
#10
Bridget Ellsworth, Atul F Kamath
Background. Pigmented villonodular synovitis (PVNS) is a rare benign tumor affecting large joints and prompts excision to prevent local destruction of the joint. The purpose of this case report is to describe two differing surgical approaches for management of PVNS of the hip in patients requiring concomitant treatment for additional hip pathology. Methods. This report discusses the presentation, clinical and radiographic findings, and operative management of two contrasting cases of PVNS of the hip. Case 1 describes a 31-year-old female with localized PVNS in addition to a labral tear treated with arthroscopic labral repair followed by tumor excision via a mini-open incision...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28267302/cytomorphology-of-metastatic-pituitary-carcinoma-to-the-bone
#11
Christopher M Chandler, Xiaoqi Lin
Metastatic pituitary carcinoma to bone is rare. In this report, we present a case of a 59-year-old female with recurrent pituitary adenoma of the sparsely granulated somatotroph subtype with metastasis to a few bony sites 10 years later. Needle core biopsy (NCB) with touch preparations was performed on a 5 mm lesion in left ilium. Diff-Quik stained NCB touch preparation slides showed a few loosely cohesive epithelial polygonal cells that were arranged in nests or acini, or singly, had scant vacuolated cytoplasm and eccentrically located round nuclei (plasmacytoid) with slight nuclear pleomorphism, fine granular chromatin, conspicuous nucleoli, and smooth nuclear membrane...
March 7, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28244926/biomechanical-evaluation-of-the-depth-of-resection-during-femoral-neck-osteoplasty-for-anterior-impingement-following-slipped-capital-femoral-epiphysis
#12
Kevin M Dale, Geoffrey T Burns, Ying Li
BACKGROUND: Femoroacetabular impingement as a result of slipped capital femoral epiphysis (SCFE) has been treated traditionally with a proximal femoral osteotomy, but open and arthroscopic femoral osteoplasty is becoming increasingly popular. Cam lesions result from excess bone primarily at the anterolateral femoral head-neck junction. SCFEs result from posterior and inferior slippage of the femoral epiphysis, causing the metaphysis to move anteriorly. This study's purpose was to compare fourth-generation sawbones standard femurs with SCFE femurs to determine whether bone resection from the anterior metaphysis results in similar biomechanical properties...
February 27, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28149735/dynamic-hip-examination-for-assessment-of-impingement-during-hip-arthroscopy
#13
Renato Locks, Jorge Chahla, Justin J Mitchell, Eduardo Soares, Marc J Philippon
Arthroscopic procedures for treatment of hip pathology are growing exponentially as a result of continued improvements in the understanding of intra- and extra-articular hip anatomy and technological advancements in instrumentation. Nevertheless, it has been reported that the main cause of revision hip arthroscopy is related to a suboptimal intrasurgical management of the abnormal morphology in femoroacetabular impingement (FAI). Under-resection, over-resection, and in some cases combined under-resection and over-resection at different locations of the cam lesion at the femoral head-neck junction may lead to poor outcomes as a result of residual impingement or the iatrogenic creation of structural instability...
December 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28149715/remplissage-of-the-femoral-head-neck-junction-in-revision-hip-arthroscopy-a-technique-to-correct-excessive-cam-resection
#14
Jonathan M Frank, Jorge Chahla, Justin J Mitchell, Eduardo Soares, Marc J Philippon
Femoroacetabular impingement (FAI) is an increasingly recognized cause of hip pain. This pathology often involves abnormal femoral neck shape (cam-type FAI), acetabular over coverage (pincer-type FAI), or mixed pathology. Surgical treatment of this entity includes labral repair and femoral head-neck osteochondroplasty. A mindful arthroscopic technique is of paramount importance, because maintaining the integrity of the labrum and a corresponding neck volume has been reported to be vital in maintaining the hip suction seal...
December 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28097642/adrenal-cyst-with-both-m%C3%A3-llerian-and-mesothelial-differentiation-a-clinicopathological-and-immunohistochemical-study-with-implications-for-histogenesis
#15
Łukasz Koperski, Benedykt Szczepankiewicz, Paweł Pihowicz, Łukasz Fus, Ewa Wolińska, Barbara Górnicka
True epithelial-lined cysts are rare forms of adrenal cystic lesions, the pathogenesis of which is still not fully understood. In this report we present a case of an adrenal cyst diagnosed incidentally on imaging in a 31-year-old, previously healthy, obese woman. Due to non-specific hormonal disorders and enlargement of the lesion, a right-sided laparoscopic adrenalectomy was performed. The cyst was lined predominantly by ciliated cuboidal-to-columnar, Müllerian-type epithelium, and focally by flat-to-cuboidal, mesothelium-like lining...
January 18, 2017: Histology and Histopathology
https://www.readbyqxmd.com/read/28072581/-131-i-activity-quantification-of-gamma-camera-planar-images
#16
Raquel Barquero, Hugo P Garcia, Monica G Incio, Pablo Minguez, Alexander Cardenas, Daniel Martínez, Michael Lassmann
A procedure to estimate the activity in target tissues in patients during the therapeutic administration of (131)I radiopharmaceutical treatment for thyroid conditions (hyperthyroidism and differentiated thyroid cancer) using a gamma camera (GC) with a high energy (HE) collimator, is proposed. Planar images are acquired for lesions of different sizes r, and at different distances d, in two HE GC systems. Defining a region of interest (ROI) on the image of size r, total counts n g are measured. Sensitivity S (cps MBq(-1)) in each acquisition is estimated as the product of the geometric G and the intrinsic efficiency η 0...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28066736/joint-preservation-after-hip-arthroscopy-in-patients-with-fai-prospective-analysis-with-a-minimum-follow-up-of-seven-years
#17
Fernando Comba, Carlos Yacuzzi, Pablo J Ali, Gerardo Zanotti, Martin Buttaro, Francisco Piccaluga
BACKGROUND: The purpose of this study is to evaluate the clinical outcomes, radiological degenerative progression and the joint preservation rate in a series of patients with Femoroacetabular Impingement (FAI) treated with hip arthroscopy at a minimum follow-up of 7 years. The predictive factors for total hip arthroplasty (THA) requirement were analyzed. MATERIALS AND METHODS: Between February 2008 and February 2009, 42 consecutive patients treated with hip arthroscopy due to FAI syndrome were included...
July 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28063144/undifferentiated-carcinoma-of-the-ampulla-of-vater
#18
Misuzu Yamada, Daisuke Furukawa, Naoki Yazawa, Hideki Izumi, Yoshihito Masuoka, Taro Mashiko, Yoshiaki Kawaguchi, Masami Ogawa, Yohei Kawashima, Tetsuya Mine, Kenichi Hirabayashi, Toshio Nakagohri
Undifferentiated carcinoma of the ampulla of Vater is a rare disease with unclear and clinical characteristics and prognosis. Here, we report the case of a 61-year-old man with undifferentiated carcinoma of the ampulla of Vater. He presented to our hospital with an increase in hepatobiliary system enzymes that was detected during a health check-up. Imaging and endoscopy demonstrated a tumor with ulcer in the ampulla of Vater, which was diagnosed as a carcinoma by biopsy. No distant metastasis was observed. Subtotal stomach-preserving pancreaticoduodenectomy was performed...
December 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28038707/cystic-and-necrotic-papillary-renal-cell-carcinoma-prognosis-morphology-immunohistochemical-and-molecular-genetic-profile-of-10-cases
#19
Kvetoslava Peckova, Petr Martinek, Kristyna Pivovarcikova, Tomas Vanecek, Reza Alaghehbandan, Kristyna Prochazkova, Delia Perez Montiel, Milan Hora, Faruk Skenderi, Monika Ulamec, Pavla Rotterova, Ondrej Daum, Jiri Ferda, Whitney Davidson, Ondrej Ondic, Magdalena Dubova, Michal Michal, Ondrej Hes
Conflicting data have been published on the prognostic significance of tumor necrosis in papillary renal cell carcinoma (PRCC). Although the presence of necrosis is generally considered an adverse prognostic feature in PRCC, we report a cohort of 10 morphologically distinct cystic and extensively necrotic PRCC with favorable biological behavior. Ten cases of type 1 PRCC with a uniform morphologic pattern were selected from the 19 500 renal tumors, of which 1311 were PRCCs in our registry. We focused on precise morphologic diagnosis supported by immunohistochemical and molecular-genetic analysis...
February 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/27787917/quantitative-comparison-of-cortical-bone-thickness-using-correspondence-based-shape-modeling-in-patients-with-cam-femoroacetabular-impingement
#20
Penny R Atkins, Shireen Y Elhabian, Praful Agrawal, Michael D Harris, Ross T Whitaker, Jeffrey A Weiss, Christopher L Peters, Andrew E Anderson
The proximal femur is abnormally shaped in patients with cam-type femoroacetabular impingement (FAI). Impingement may elicit bone remodeling at the proximal femur, causing increases in cortical bone thickness. We used correspondence-based shape modeling to quantify and compare cortical thickness between cam patients and controls for the location of the cam lesion and the proximal femur. Computed tomography images were segmented for 45 controls and 28 cam-type FAI patients. The segmentations were input to a correspondence-based shape model to identify the region of the cam lesion...
October 27, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
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