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Kumar K, Murugesan S. Synthesis, characterization and anti-bacterial activity of divalent transition metal complexes of hydrazine and trimesic acid. JOURNAL OF SAUDI CHEMICAL SOCIETY 2018. [DOI: 10.1016/j.jscs.2017.05.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kamble N, Mastammannavar V, Yadav R, Netravathi M, Kumar K, Pal P. Non-motor symptoms in patients with autosomal dominant spinocerebellar ataxia. Parkinsonism Relat Disord 2018. [DOI: 10.1016/j.parkreldis.2017.11.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Patil S, Thungappa S, Kumar K, Prasad K, Tilak T, Shashidhara H, Somashekhar S. Retrospective multicentric analysis of Indian patients with metastatic renal cell carcinoma on first-line sunitinib 2/1 schedule. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx661.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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54
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Khanna R, Kumar K, Roy R. A case study of primary malignancy of buccal mucosa using proton HR-MAS NMR spectroscopy on tissue specimens. J Oral Biol Craniofac Res 2017; 8:68-72. [PMID: 29556467 DOI: 10.1016/j.jobcr.2017.09.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 09/28/2017] [Indexed: 10/18/2022] Open
Abstract
The diagnosis and confirmation of oral SCC (squamous cell carcinoma) is still dependent on histopathology report in spite of development of radiological investigations. It is, thus important to understand the underlying molecular mechanisms and how the alterations in metabolic pathways effect the tumor development and progression. The simultaneous and comprehensive information about the presence and absence of small molecule metabolites and their relative concentrations has been provided by 1H HR-MAS NMR spectroscopy on tissue specimens. In this paper a unique case study was presented in order to correlate histological and NMR spectroscopic findings. The patient's initially lesion was found to be non-malignant in nature based on histological findings but its periodic localized recurrence even after laser ablation prompted us to perform HR-MAS based analysis and its role in identifying the metabolic alterations in known pathways occurring during its progressions. Thus it was confirmed after analysis that HR-MAS NMR can also be used as an analytical tool which is reliable in order to distinguish between malignant and non-malignant tissues, in combination with histopathology.
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Kaushik D, Joshi N, Kumar R, Gaba S, Sapra R, Kumar K. Negative pressure wound therapy versus gauze dressings for the treatment of contaminated traumatic wounds. J Wound Care 2017; 26:600-606. [PMID: 28976825 DOI: 10.12968/jowc.2017.26.10.600] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE This compares hospital suction negative pressure wound therapy (NPWT) with conventional gauze dressings in traumatic soft-tissue injury at a tertiary care centre. METHODS A prospective control study was conducted between September 2012 and November 2014. Patients with one or more traumatic soft-tissue injuries with contaminated wounds were allocated to either a test group (received NPWT) or control group (received conventional gauze). Wounds were assessed by two orthopaedic surgeons. If grade A was achieved, the wound was covered with split-thickness skin graft, flap or delayed primary closure; otherwise, revision debridement and NPWT/saline gauze dressings were applied. Descriptive statistics (mean, standard deviation and proportions) were used to summarise the study variables. The 95% confidence intervals (CI) for difference of mean were used. Chi-square test and Fisher's exact test were used to observe an association between the qualitative data and outcome variables. Unpaired T-Test and Mann-Whitney U test were used for analysis of the quantitative data. A p<0.05 was considered statistically significant. RESULTS A total of 104 patients were included. The mean number of dressings per patient was significantly lower in the NPWT group (3.4) than in the control group (20.7) (p<0.001). The time between injury and complete closure (12.5 versus 21.4 days) as well as duration of hospital stay (17.3 versus 23.8 days) was significantly less in the NPWT group (p<0.05). CONCLUSION NPWT has a role in healing traumatic wounds and can be delivered effectively through hospital suction NPWT, which can also reduce the cost of therapy. We recommend its regular use in all patients presenting with post-traumatic, soft-tissue injuries when primary coverage is not possible.
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Kumar K, Lewis S, Vinci S, Riera-Escamilla A, Fino MG, Tamburrino L, Muratori M, Larsen P, Krausz C. Evaluation of sperm DNA quality in men presenting with testicular cancer and lymphoma using alkaline and neutral Comet assays. Andrology 2017; 6:230-235. [DOI: 10.1111/andr.12429] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Revised: 07/14/2017] [Accepted: 08/21/2017] [Indexed: 02/03/2023]
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57
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Dhua A, Kumar K, Nagendla M, Bhatnagar V, Mridha A. Lingual leiomyomatous hamartoma with bifid tip of tongue and ankyloglossia in an infant. ACTA ACUST UNITED AC 2017. [DOI: 10.1111/ors.12296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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58
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V. Ramana P, Viswadevarayulu A, Kumar K, Adinarayana Reddy S. Synergetic enhanced day-light driven photocatalytic reduction of heavy metal Cr(VI) by graphene supported ZnO nanocubes. ACTA ACUST UNITED AC 2017. [DOI: 10.5185/amlett.2017.7057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Kumar R, Bhowmik S, Kumar K. Establishment and Effect of Constraint on Different Mechanical Properties of Bamboo Filler Reinforced Epoxy Composite. INT POLYM PROC 2017. [DOI: 10.3139/217.3311] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
With the growing apprehension about ecology and economics, the composite materials based on low-cost lignocellulosic biomass have generated a great interest of research. In this paper, a polymer composite has been developed using specific grade epoxy matrix and “particular micron size” bamboo filler and its different mechanical properties have been investigated. The mechanical properties were determined with a variation in different constraints like filler content, strain rate, temperature and chemical treatment to establish the applicability of the developed composite. From the results, it has been found that the static and dynamic mechanical properties of the developed composite are significantly influenced by the different parameters. The scanning electron micrographs demonstrated the even dispersion of particulate fillers in the matrix, agglomeration at higher filler loading and better adhesion due to alkali treatment. Also, the properties are comparable with the existing different bamboo based composite.
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Ewing T, Ahn M, Kumar K, Vaughn B, Roth H, Fan Z. 0865 SLEEP PARAMETERS OF PATIENTS WITH DUCHENNE MUSCULAR DYSTROPHY. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ramakrishnan S, Liu J, Khitrov MY, Kumar K, Tountas NA, Wesensten NJ, Balkin TJ, Reifman J. 0241 2B-ALERT APP AND WEB: TOOLS FOR MEASURING, PREDICTING, AND OPTIMIZING NEUROBEHAVIORAL PERFORMANCE AT INDIVIDUAL AND GROUP-AVERAGE LEVELS. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Woo HJ, Yu C, Kumar K, Reifman J. Large-scale interaction effects reveal missing heritability in schizophrenia, bipolar disorder and posttraumatic stress disorder. Transl Psychiatry 2017; 7:e1089. [PMID: 28398343 PMCID: PMC5416702 DOI: 10.1038/tp.2017.61] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 01/18/2017] [Accepted: 02/10/2017] [Indexed: 02/07/2023] Open
Abstract
Genetic susceptibility factors behind psychiatric disorders typically contribute small effects individually. A possible explanation for the missing heritability is that the effects of common variants are not only polygenic but also non-additive, appearing only when interactions within large groups are taken into account. Here, we tested this hypothesis for schizophrenia (SZ) and bipolar disorder (BP) disease risks, and identified genetic factors shared with posttraumatic stress disorder (PTSD). When considered independently, few single-nucleotide polymorphisms (SNPs) reached genome-wide significance. In contrast, when SNPs were selected in groups (containing up to thousands each) and the collective effects of all interactions were estimated, the association strength for SZ/BP rose dramatically with a combined sample size of 7187 cases and 8309 controls. We identified a large number of genes and pathways whose association was significant only when interaction effects were included. The gene with highest association was CSMD1, which encodes a negative regulator of complement activation. Pathways for glycosaminoglycan (GAG) synthesis exhibited strong association in multiple contexts. Taken together, highly associated pathways suggested a pathogenesis mechanism where maternal immune activation causes disruption of neurogenesis (compounded by impaired cell cycle, DNA repair and neuronal migration) and deficits in cortical interneurons, leading to symptoms triggered by synaptic pruning. Increased risks arise from GAG deficiencies causing complement activation and excessive microglial action. Analysis of PTSD data sets suggested an etiology common to SZ/BP: interneuron deficiency can also lead to impaired control of fear responses triggered by trauma. We additionally found PTSD risk factors affecting synaptic plasticity and fatty acid signaling, consistent with the fear extinction model. Our results suggest that much of the missing heritability of psychiatric disorders resides in non-additive interaction effects.
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Kumar K, Jaganmohan C, Reddy G, Mohanty S, Kumar J, Rao V. Facile Utilisation of Aldehyde Bisulfite Adducts: Synthesis of (E)-1,2- Diphenylethenes. LETT ORG CHEM 2017. [DOI: 10.2174/1570178614666170203095116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Chilukuri S, Naumaan M, Pawar S, Kumar K, Nalini Y, Subramaniam S. Radical Dose Escalated Image-guided Radiotherapy and Concurrent Cisplatinum for Locally Advanced Oesophageal Cancer: Potential Standard in Developing Country Setting. Clin Oncol (R Coll Radiol) 2017. [DOI: 10.1016/j.clon.2016.10.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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65
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Reddy Y, Chetty C, Kumar K, Dachinamoorthi D. Formulation and Optimization of Extended Release Matrix Tablets of Losartan Potassium Using Response Surface Methodology (RSM). JOURNAL OF PHARMACEUTICAL RESEARCH INTERNATIONAL 2017. [DOI: 10.9734/jpri/2017/36668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kumar K, King EA, Muzaale AD, Konel JM, Bramstedt KA, Massie AB, Segev DL, Cameron AM. A Smartphone App for Increasing Live Organ Donation. Am J Transplant 2016; 16:3548-3553. [PMID: 27402293 DOI: 10.1111/ajt.13961] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 06/22/2016] [Indexed: 01/25/2023]
Abstract
The incidence of live donor transplantation has declined over the past decade, and waitlisted candidates report substantial barriers to identifying a live donor. Since asking someone to donate feels awkward and unfamiliar, candidates are hesitant to ask directly and may be more comfortable with a passive approach. In collaboration with Facebook leadership (Facebook Inc., Menlo Park, CA), we developed a mobile application-an app-that enables waitlisted candidates to create a Facebook post about their experience with organ failure and their need for a live donor. We conducted a single-center prospective cohort study of 54 adult kidney-only and liver-only waitlisted candidates using the Facebook app. Cox proportional hazards models were used to describe donor referral on behalf of candidates using the app compared with matched controls. The majority of candidates who used the app reported it to be "good" or "excellent" with regard to the installation process (82.9%), readability (88.6%), simplicity (70.6%), clarity (87.5%) and the information provided (85.3%). Compared with controls, candidates using the Facebook app were 2.43 6.6117.98 times more likely to have a donor come forward on their behalf (p < 0.001). The Facebook app is an easy-to-use instrument that enables waitlisted candidates to passively communicate with their social network about their need for a live donor.
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Bogle OA, Kumar K, Attardo-Parrinello C, Lewis SEM, Estanyol JM, Ballescà JL, Oliva R. Identification of protein changes in human spermatozoa throughout the cryopreservation process. Andrology 2016; 5:10-22. [PMID: 27860400 DOI: 10.1111/andr.12279] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 07/15/2016] [Accepted: 07/30/2016] [Indexed: 01/11/2023]
Abstract
Cryoinjury is a consequence of cryopreservation and may have a negative impact on sperm quality regarding motility, morphology, and viability. This study was designed to identify potential proteomic changes in human sperm cells throughout the cryopreservation process. Comparisons made within this study included the detection of the sperm proteomic changes induced by incubation of the sperm cells with a protein-free cryoprotectant (with and without CryoSperm), and the proteomic changes induced by freezing, thawing, and subsequent after-thawing incubation at two different temperatures (0 °C vs. 23 °C). Tandem Mass Tag (TMT) peptide labeling coupled with LC-MS/MS was used for protein quantification. LC-MS/MS resulted in the identification of 769 quantifiable proteins. The abundance of 105 proteins was altered upon CryoSperm incubation. Freezing and thawing also induced substantial protein changes. However, fewer changes were observed when semen was thawed and then maintained after-thawing at approximately 0 °C than when it was maintained after-thawing at 23 °C, with 60 and 99 differential proteins detected, respectively, as compared to unfrozen semen incubated in CryoSperm. Collectively, these differences indicate that substantial changes occur in the sperm proteome at every stage of the cryopreservation process which may ultimately impair the sperm fertilizing capability. This is the first study to compare protein levels in fresh and cryopreserved semen using the TMT technology coupled to LC-MS/MS.
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Waxman R, Adebajo A, Robinson S, Walker D, Johnson M, Rahman A, Samanta A, Kumar K, Raza K, Helliwell P. A feasibility study of educational tools for osteomalacia. Clin Rheumatol 2016; 36:635-640. [PMID: 27785646 PMCID: PMC5323499 DOI: 10.1007/s10067-016-3451-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 10/09/2016] [Indexed: 11/25/2022]
Abstract
Many people in the UK, particularly people of South Asian origin, are advised to supplement their vitamin D intake, yet most do not. This suggests an unmet educational need. The osteomalacia mind map was developed to meet this need. The mind map contains culturally sensitive images, translated into Urdu and made interactive on a DVD. This study explores the feasibility of a randomised controlled study to measure the effect of education on improving vitamin D knowledge and adherence. This was a pilot and feasibility study. Cluster randomisation was used to avoid inter person contamination. Two South Asian women's groups were recruited to receive information about osteomalacia either by interactive DVD or an Arthritis Research UK leaflet. Knowledge and compliance were tested before and after the educational interventions via a knowledge questionnaire and the measurement of vitamin D and parathormone levels. The groups were found to be mismatched for knowledge, educational attainment and language at baseline. There were also organisational difficulties and possible confounding due to different tutors and translators. The DVD group had high knowledge at baseline which did not improve. The leaflet group had low knowledge at baseline that did improve. The DVD group had lower parathormone which did not change. The leaflet group had an increase in vitamin D but parathormone remained high. Performing a randomised study with this population utilising an educational intervention was difficult to execute. If cluster randomisation is used, extreme care must be taken to match the groups at baseline.
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Kumar A, Tiwari SP, Kumar K, Rai VK. Structural and optical properties of thermal decomposition assisted Gd2O3:Ho(3+)/Yb(3+) upconversion phosphor annealed at different temperatures. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 167:134-141. [PMID: 27284763 DOI: 10.1016/j.saa.2016.05.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 04/23/2016] [Accepted: 05/09/2016] [Indexed: 06/06/2023]
Abstract
The infrared to visible upconversion fluorescent nanoparticles of Ho(3+)/Yb(3+) codoped Gd2O3 phosphor is synthesized via thermal decomposition route. The as-synthesized sample was annealed at 800, 1000 and 1200°C for 3h and then structural and optical properties were studied. The Rietveld refinement of X-ray diffraction (XRD) data was analyzed to probe the effect of Ho(3+)/Yb(3+) dopant on the structural parameters of Gd2O3 host. The upconversion emission spectra of as-synthesized and annealed samples are compared using 980nm diode laser excitation and five emission bands noticed at 490, 539, 550, 667 and 757nm corresponding to the (5)F3→(5)I8, (5)F4→(5)I8, (5)S2→(5)I8,(5)F5→(5)I8 and (5)I4→(5)I8 manifolds, respectively. The local temperature induced by laser light is also calculated. The fluorescence intensity ratio (FIR) of two thermally coupled transitions (5)F4→(5)I8 and (5)S2→(5)I8 is plotted against the sample temperature and sensor sensitivity of sample is calculated.
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Kumar K, Dhaliwal S, Sookhoo S, Pozeg Z. ENDOVASCULAR REPAIR OF ACUTE TYPE A DISSECTION USING AN ISOLATED ASCENDING AORTIC SPECIFIC GRAFT - CASE REPORT. Can J Cardiol 2016. [DOI: 10.1016/j.cjca.2016.07.506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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71
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Kumar K, Cox QGN. Pin Arthrodesis of the Wrist – A Modified Technique. ACTA ACUST UNITED AC 2016; 30:461-3. [PMID: 15993523 DOI: 10.1016/j.jhsb.2005.05.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2004] [Accepted: 05/03/2005] [Indexed: 11/26/2022]
Abstract
An intramedullary pin is commonly used for wrist arthrodesis in patients with rheumatoid arthritis. However, pin migration is a recognized complication of this technique. We report the results of wrist fusion in 15 patients using a modified technique with a transverse blocking screw inserted into the metacarpal distal to the intramedullary pin to prevent distal migration and backing out of the intramedullary pin. The procedure is simple to perform, does not add significantly to the operating time and has not been associated with any complications.
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Perumal P, Srivastava SK, Ghosh SK, Baruah KK, Bag S, Rajoria JS, Kumar K, Rajkhowa C, Pande M, Srivastava N. Effects of low-density lipoproteins as additive on quality parameters and oxidative stress following cryopreservation of mithun (Bos frontalis
) spermatozoa. Reprod Domest Anim 2016; 51:708-16. [DOI: 10.1111/rda.12735] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 06/20/2016] [Indexed: 11/26/2022]
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Acharya S, Prusty N, Naik C, Kumar K. Maxillary Calcifying Epithelial Odontogenic Tumour. JNMA J Nepal Med Assoc 2016; 55:36-39. [PMID: 27935922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Abstract
The calcifying epithelial odontogenic tumor is a benign, locally invasive, slow-growing neoplasm occurring as intraosseous (94%) and extraosseous (6%) variants and with a frequency of 1-2%. Extraosseous variant is diagnosed slightly earlier than the intraosseous type. The intraosseous CEOT shows a maxilla:mandible site ratio of 1:2 and are mainly located in the premolar/molar region. Histologically, the CEOT is characterized by the occurrence of sheets, nests and masses of polyhedral, eosinophilic epithelial cells which may show cellular abnormalities including giant cell formation and nuclear pleomorphism. Some cells increase in size and produce a homogeneous, eosinophilic, 'amyloid-like' substance which may become calcified and which may be liberated as the cells break down. Enucleation with a margin of macroscopically normal tissue is the recommended treatment for CEOT involving the mandible. Maxillary CEOT are treated more aggressively, as they tend to grow more rapidly and do not usually remain well confined.
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Simons G, Belcher J, Morton C, Kumar K, Falahee M, Mallen C, Stack R, Raza K. FRI0078 Symptom Recognition and Its Effect on Help-Seeking in Rheumatoid Arthritis, Bowel Cancer and Angina: A Mixed Methods Approach. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Kumar K, Cordingley L, Maskell D, Nair N, Barton A. AB1089-HPR Perceptions of Patients with Rheumatoid Arthritis about Predictive Testing for Treatments: A Qualitative Study. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.1272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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