Effectiveness of Gefitinib as additional Radiosensitizer to Conventional Chemoradiation for Locally advanced non-metastatic Squamous Cell Carcinoma of Head and Neck. Prospective interventional Randomized Controlled Study

Approximately 90% of head and neck squamous cell carcinoma (HNSCC) overexpress epidermal growth factor receptor (EGFR). EGFR plays a role in predict­ing and modulating the response of HNSCC patients to radiation. Cetuximab is established as potent radiosensitizer.  However data regarding use of tyrosine kinase inhibitors like gefitinib is limited. Aim of this study is to establish the radiosensitizer efficacy of daily gefitinib with concurrent chemoradiotherapy in patients with locally advanced non metastatic HNSCC (LAHNSCC). Between July, 2008 to October, 2011, 104 patients with LAHNSCC were randomized into two arms; in Arm A (experimental arm), patients received gefitinib (250 mg orally daily along with cisplatin based chemoradiation) and Arm B (control arm), patients received concurrent cisplatin based chemoradiation with Cisplatin dose of 100mg/m2 intravenous infusion given on Days 1 and 22 with conventional fractionated radiation of 60-66 Gray. Response assessments were done using RECIST and adverse events by NCI-CTCAE version 3. The median follow-up time was 26 months (range 2-35 months). There was statistical difference in overall response between the two arms (p value 0.041) in favour of gefitinib arm (n=48) with overall response (ORR=CR+PR) of 91.6 % versus 69.5% in conventional cisplatin chemoradiation (n=46). Disease Free Survival favored the Gefitinib arm with Log Rank p value of 0.008. Gefitinib arm resulted in more grade 2 and 3 dermatitis, mucositis and diarrheal events. Adding Gefitinib to conventional chemoradiation in treatment of LAHNSCC improves ORR and DFS, with an increase in incidence of manageable toxicity. Keywords: Chemoradiation, Gefitinib, Radiosensitizer

Hepatoid Adenocarcinoma of the Stomach: a rare histology of Gastric Adenocarcinoma in an adolescent: a case report

Hepatoid adenocarcinoma is a rare subtype of extra-hepatic adenocarcinoma generally characterized by hepatocellular carcinoma like foci in the background of adenocarcinoma. Stomach is the most frequent site where hepatoid adenocarcinoma occurs, although it has been described in many other organs. We describe a case of 16 years old adolescent girl who was diagnosed as a case of “hepatoid adenocarcinoma of stomach, an unlikely presentation at this young age. Keywords: Hepatoid adenocarcinoma, stomach, adolescent

Epidermolytic hyperkeratosis: a rare case

A 6 month old girl presented with generalized hyperkeratosis, most marked over the flexures since birth. On the basis of the clinical& histopathologic findings, she was diagnosed as a case of epidermolytic hyperkeratosis .She was treated with retinoid therapy. Epidermolytic hyperkeratosis (EHK) is an uncommon form childhood keratinizing disorder. Early in life it is associated with generalized blistering and erythroderma. Later on, it produces rippled type of hyperkeratosis. The purpose of this report is to highlight the features of this rare case

The effect of compaction pressure, sintering time, and temperature on the characterization of an aluminum/alumina composite with rising alumina proportions

The purpose of this article is to investigate the effect of various process parameters such as compaction pressure, sintering temperature, and time on the physio-mechanical properties of a powder metallurgy-fabricated composite made of pure aluminium/alumina. Temperatures (580°C, 600°C, and 630°C), periods (1.5, 2, and 2.5 hr), compacting loads (30KN-65KN), and alumina percentages (2, 4, 6, and 8weight percent) are all considered. X-ray diffraction (XRD) and X-ray fluorescence spectroscopy (XRF) studies are carried out to determine the phases present and their proportions. Crystallite size study is performed using XRD data, and the Al+4 weight % alumina composite has the smallest size of any composite tested. For optimization, sintering density, porosity, and microhardness are calculated. Scanning electron microscopy (SEM) is used to analyse the different microstructures. At 600°C, 2 hr of operating time, and 4weight% alumina additions, the highest sintering density and microhardness are found

Multiple novel prostate cancer susceptibility signals identified by fine-mapping of known risk loci among Europeans

Genome-wide association studies (GWAS) have identified numerous common prostate cancer (PrCa) susceptibility loci. We have fine-mapped 64 GWAS regions known at the conclusion of the iCOGS study using large-scale genotyping and imputation in 25 723 PrCa cases and 26 274 controls of European ancestry. We detected evidence for multiple independent signals at 16 regions, 12 of which contained additional newly identified significant associations. A single signal comprising a spectrum of correlated variation was observed at 39 regions; 35 of which are now described by a novel more significantly associated lead SNP, while the originally reported variant remained as the lead SNP only in 4 regions. We also confirmed two association signals in Europeans that had been previously reported only in East-Asian GWAS. Based on statistical evidence and linkage disequilibrium (LD) structure, we have curated and narrowed down the list of the most likely candidate causal variants for each region. Functional annotation using data from ENCODE filtered for PrCa cell lines and eQTL analysis demonstrated significant enrichment for overlap with bio-features within this set. By incorporating the novel risk variants identified here alongside the refined data for existing association signals, we estimate that these loci now explain ∼38.9% of the familial relative risk of PrCa, an 8.9% improvement over the previously reported GWAS tag SNPs. This suggests that a significant fraction of the heritability of PrCa may have been hidden during the discovery phase of GWAS, in particular due to the presence of multiple independent signals within the same regio

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| < 0.03 at 95% confidence level. [Figure not available: see fulltext.

MUSiC : a model-unspecific search for new physics in proton-proton collisions at root s=13TeV

Results of the Model Unspecific Search in CMS (MUSiC), using proton-proton collision data recorded at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1), are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.Peer reviewe

Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe

Measurement of prompt open-charm production cross sections in proton-proton collisions at root s=13 TeV

The production cross sections for prompt open-charm mesons in proton-proton collisions at a center-of-mass energy of 13TeV are reported. The measurement is performed using a data sample collected by the CMS experiment corresponding to an integrated luminosity of 29 nb(-1). The differential production cross sections of the D*(+/-), D-+/-, and D-0 ((D) over bar (0)) mesons are presented in ranges of transverse momentum and pseudorapidity 4 < p(T) < 100 GeV and vertical bar eta vertical bar < 2.1, respectively. The results are compared to several theoretical calculations and to previous measurements.Peer reviewe