Metástasis gingival de adenocarcinoma de colon

La cavidad oral es lugar de asiento de tumores metastásicos, sobre todo con origen en mama y pulmón. La mayoría de los casos afectan por este orden a los huesos mandibular y maxilar, aunque en ocasiones se desarrollan sobre las partes blandas intraorales. Presentamos el caso de un paciente de 62 años diagnosticado de adenocarcinoma de colon sigmoide con metástasis ganglionares y hepáticas, que 6 meses después presenta una lesión vegetante en la encía, interpretada inicialmente como neoplasia primaria de encía, que tras ser biopsiada fue diagnosticada como adenocarcinoma intestinal metastásico. El estudio histológico es obligatorio para diferenciar un adenocarcinoma de los carcinomas de células escamosas, habituales en la zona, y las técnicas inmunohistoquímicas permiten diferenciar entre un tumor metastásico, sea intestinal o de otro origen, y un adenocarcinoma primario originado en glándulas salivares menores de la zona. La presencia de un tumor diseminado con extensión intraoral acarrea un pronóstico ominoso, aunque si se trata de una metástasis única es posible un tratamiento quirúrgico radical con una supervivencia mayor.Metastatic tumors involve the oral cavity, and the most common primary sites are the breast and lung. Most cases affect the mandible and maxilla in that order, although some of them can be located in the soft perioral tissues. We report the case of a 62-year-old male who had been diagnosed with sigmoid adenocarcinoma with nodal and liver metastasis, who presented 6 months later with a gingival polypoid tumor, at first considered as a primary neoplasm of gingiva, that was diagnosed in a biopsy as metastatic intestinal adenocarcinoma. The histological evaluation is essential to separate adenocarcinoma from the commoner in this site squamous cell carcinoma, and the immunohistochemical techniques are useful to distinguish metastatic tumor versus primary adenocarcinoma from the minor salivary glands of the area. The intraoral spread of a disseminated neoplasm is generally a sign of bad prognosis, although a longer survival can be expected if a radical surgical treatment of a solitary metastasis is carried out

Colon adenocarcinoma with metastasis to the gingiva

La cavidad oral es lugar de asiento de tumores metastásicos, sobre todo con origen en mama y pulmón. La mayoría de los casos afectan por este orden a los huesos mandibular y maxilar, aunque en ocasiones se desarrollan sobre las partes blandas intraorales. Presentamos el caso de un paciente de 62 años diagnosticado de adenocarcinoma de colon sigmoide con metástasis ganglionares y hepáticas, que 6 meses después presenta una lesión vegetante en la encía, interpretada inicialmente como neoplasia primaria de encía, que tras ser biopsiada fue diagnosticada como adenocarcinoma intestinal metastásico. El estudio histológico es obligatorio para diferenciar un adenocarcinoma de los carcinomas de células escamosas, habituales en la zona, y las técnicas inmunohistoquímicas permiten diferenciar entre un tumor metastásico, sea intestinal o de otro origen, y un adenocarcinoma primario originado en glándulas salivares menores de la zona. La presencia de un tumor diseminado con extensión intraoral acarrea un pronóstico ominoso, aunque si se trata de una metástasis única es posible un tratamiento quirúrgico radical con una supervivencia mayor

Estudio taxonómico preliminar de la ficoflora planctónica en la zona aluvial del Río Colorado (La Pampa, Argentina)

This work is part of a larger project on the study of algal biodiversity of a lotic system in La Pampa province. In this first stage we analyze the algal flora of samples collected during the summer season and autumn of 2010. The study area is located in the floodplain of the Colorado River, the natural boundary between the provinces of La Pampa and Río Negro at its intersection with Provincial Route 11 (Department Lihuel Calel). The methodology used in the collection followed the standard parameters for lotic environments. The samples were fixed with 4% formaldehyde and deposited in the herbarium of the Faculty of Agronomy (UNLPam) under the symbol SRFA. The preliminary results of the algal flora of summer and autumn shows 64 taxa, of which 26.5% corresponds to Cyanophyceae, 36% to Chlorophyceae and Bacillariophyceae, and 1.5% to Dinophyceae. During the summer the class Chlorophyceae species contributed 40% and fall did the Bacillariophyceae with 43.7%. The 37.5% of the registered species were common to both seasons

Ficoflora de la laguna Don Tomás (La Pampa, Argentina)

The work deals with the analyze composition and seasonal distribution of phytoplantonic species of Don Tomas Shallow lake during an annual cycle. Six monthly samples were collected (August 2002 to July 2003) and they were qualitatively studied. The physical and chemical parameters were registered in the same time. The index of similarity of Sorensen was made In order to determine the degree of similarity of the seasonal distribution of the taxa. The phytoplanctonic taxocenosis community richness specific of the was of 159 taxa. Groups with a noticeable seasonal distribution were showed with cluster analyzed. Four seasonal groups were identified. September, October and November correspond to the spring; the second group, summer, was integrated for December, January and February, and the third group was constituted for March, April, May, June and July. Different environmental conditions during the winter of 2002 had isolated the results of August.El objetivo del presente trabajo es analizar la composición y la distribución estacional de las especies fitoplanctónicas de la Laguna Don Tomás durante un ciclo anual. Se colectaron muestras mensuales (agosto 2002 a julio 2003), los que se estudiaron cualitativamente. Asimismo, se analizaron parámetros fisicoquímicos. Se realizó un análisis de clusters en base al índice de similitud de Sorensen, para determinar la distribución de los taxa. La riqueza específica de la taxocenosis fitoplanctónica fue de 159 taxa. Los cluster mostraron agrupamientos con una marcada distribución estacional. Se identificaron cuatro grupos. El primero compuesto por los meses de septiembre, octubre y noviembre corresponden a la primavera, el segundo grupo, verano, integrado por diciembre, enero y febrero y el tercer grupo está constituido por marzo, abril, mayo, junio y julio. Los resultados correspondientes al mes de Agosto se aíslan del resto del año por condiciones ambientales particulares

Estudio del fitoplancton aguas arriba y aguas abajo del dique Embalse Casa de Piedra, Río Colorado (La Pampa, Argentina)

In order to study the phytoplankton composition of the Colorado river, seasonal samples were taken during the period between May 2010 and April 2011. The study area is a natural border basin of the provinces of La Pampa and Río Negro and a transitional basin of Patagonia Argentina without records of previous studies. Selected sampling points are located upstream and downstream of the dam reservoir Casa de Piedra. In this study are presented preliminary results of phytoplankton composition analized in emplaced sites at 38º01’58”S-67º52’90”W to 288 msnm and 38°14’55’’ S-67º11’49’’W to 232 msnm. Samples were collected with plankton net of 20 μm mesh size and physicochemical variables were recorded simultaneously. Phytoplankton samples were observed in vivo and then fixed in 4% formalin and embedded in the herbarium of the SRFA UNLPam. As a result of the qualitative study so far hundred forty-one taxa were reported, of which twenty-nine belong to Cyanophyceae, fourty five to Chlorophyceae and fifty five to Bacillariophyceae. The index of similarity of Bray Curtis with S= 48 separates the sampled sites. The greatest similarity is between summer and autumn of 2011 with S = 66.66. Among the common species of Bacillariophyceae, with Aulacoseira granulata var. angustissima, Melosira varians, Fragilaria crotonensis, Cocconeis placentula var. euglypta, Epithemia sorex, Nitzschia sigma, N. sigmoidea and Cymatopleura solea were the highest percentage of occurrence at the study sites. Our results represent a great advance in the knowledge and distribution of algae in this region of the country.Para estudiar la composición del fitoplancton del río Colorado, se tomaron muestras estacionales durante el período comprendido entre mayo de 2010 y abril de 2011. El área de estudio es una cuenca natural fronteriza de las provincias de La Pampa y Río Negro y una cuenca de transición de la Patagonia Argentina. Sin registros de estudios previos. Los puntos de muestreo seleccionados están ubicados aguas arriba y aguas abajo del embalse de la presa Casa de Piedra. En este estudio se presentan los resultados preliminares de la composición de fitoplancton analizada en sitios emplazados a 38º01’58” S; 67º52’90” W a 288 msnm y 38° 14’55” S-67º11’49” W a 232 msnm. Las muestras se colectaron con una red de plancton de un tamaño de malla de 20 μm y las variables fisicoquímicas se registraron simultáneamente. Las muestras de fitoplancton se observaron in vivo y luego se fijaron en formalina al 4% y se incluyeron en el herbario del SRFA UNLPam. Como resultado del estudio cualitativo realizado hasta la fecha, se informaron ciento cuarenta y un taxones, de los cuales veintinueve pertenecen a Cyanophyceae, cuarenta y cinco a Chlorophyceae y cincuenta y cinco a Bacillariophyceae. El índice de similitud de Bray Curtis con S = 48 separa los sitios muestreados. La mayor similitud es entre verano y otoño de 2011 con S = 66,66 entre las especies comunes de Bacillariophyceae, con Aulacoseira granulata var. angustissima, Melosira varians, Fragilaria crotonensis, Cocconeis placentula var. euglypta, Epithemia sorex, Nitzschia sigma, N. sigmoidea y Cymatopleura solea fueron el porcentaje más alto de ocurrencia en los sitios de estudio. Nuestros resultados representan un gran avance en el conocimiento y distribución de algas en esta región del país

Search for Technicolor Particles Produced in Association with a W Boson at CDF

7 páginas, 3 figuras, 1 tabla.-- PACS numbers: 14.80.Tt, 12.60.Nz, 13.85.Rm.-- CDF Collaboration: et al.We present a search for the technicolor particles ρT and πT in the process pp̅ →ρT→WπT at a center of mass energy of √s=1.96  TeV. The search uses a data sample corresponding to approximately 1.9  fb-1 of integrated luminosity accumulated by the CDF II detector at the Fermilab Tevatron. The event signature we consider is W→ℓν and πT→bb̅ , bc̅ or bu̅ depending on the πT charge. We select events with a single high-pT electron or muon, large missing transverse energy, and two jets. Jets corresponding to bottom quarks are identified with multiple b-tagging algorithms. The observed number of events and the invariant mass distributions are consistent with the standard model background expectations, and we exclude a region at 95% confidence level in the ρT-πT mass plane. As a result, a large fraction of the region m(ρT)=180–250  GeV/c2 and m(πT)=95–145  GeV/c2 is excluded.We thank Ken Lane for many fruitful discussions, the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; the Swiss National Science Foundation; the A.P. Sloan Foundation; the Bundesministerium für Bildung und Forschung, Germany; the World Class University Program, the National Research Foundation of Korea; the Science and Technology Facilities Council and the Royal Society, UK; the Institut National de Physique Nucleaire et Physique des Particules/CNRS; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; and the Academy of Finland.Peer reviewe

Search for standard model Higgs boson production in association with a W boson using a neural network discriminant at CDF

15 páginas, 4 figuras, 7 tablas.-- CDF Collaboration: et al.We present a search for standard model Higgs boson production in association with a W boson in proton-antiproton collisions (pp ->(WH)-H-+/--> l nu bb) at a center of mass energy of 1.96 TeV. The search employs data collected with the CDF II detector that correspond to an integrated luminosity of approximately 1.9 fb(-1). We select events consistent with a signature of a single charged lepton (e(+/-)/mu(+/-)), missing transverse energy, and two jets. Jets corresponding to bottom quarks are identified with a secondary vertex tagging method, a jet probability tagging method, and a neural network filter. We use kinematic information in an artificial neural network to improve discrimination between signal and background compared to previous analyses. The observed number of events and the neural network output distributions are consistent with the standard model background expectations, and we set 95% confidence level upper limits on the production cross section times branching fraction ranging from 1.2 to 1.1 pb or 7.5 to 102 times the standard model expectation for Higgs boson masses from 110 to 150 GeV/c(2), respectively.We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; the Swiss National Science Foundation; the A.P. Sloan Foundation; the Bundesministerium für Bildung und Forschung, Germany; the Korean Science and Engineering Foundation and the Korean Research Foundation; the Science and Technology Facilities Council and the Royal Society, UK; the Institut National de Physique Nucleaire et Physique des Particules/CNRS; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación, and Programa Consolider- Ingenio 2010, Spain; the Slovak R&D Agency; and the Academy of Finland.Peer reviewe

Study of the associated production of photons and b-quark jets in pp̅ collisions at √s=1.96 TeV

8 páginas, 2 figuras, 1 tabla.-- PACS numbers: 12.38.Qk, 13.85.Qk, 13.87.Ce.-- CDF Collaboration: et al.The cross section for photon production in association with at least one jet containing a b quark has been measured in proton antiproton collisions at root s = 1.96 TeV. The data sample used corresponds to an integrated luminosity of 340 pb(-1) collected with the CDF II detector. Both the differential cross section as a function of photon transverse energy E-T(gamma) and the total cross section are measured and compared to a next-to-leading order prediction of the process are presented.We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; the Swiss National Science Foundation; the A.P. Sloan Foundation; the Bundesministerium für Bildung und Forschung, Germany; the World Class University Program, the National Research Foundation of Korea; the Science and Technology Facilities Council and the Royal Society, UK; the Institut National de Physique Nucleaire et Physique des Particules/CNRS; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación, and Programa Consolider- Ingenio 2010, Spain; the Slovak R&D Agency; and the Academy of Finland.Peer reviewe

Combined Tevatron upper limit on gg -> H -> W+W- and constraints on the Higgs boson mass in fourth-generation fermion models

12 páginas, 4 figuras, 2 tablas.-- CDF Collaboration: et al.We combine results from searches by the CDF and D0 collaborations for a standard model Higgs boson (H) in the process gg -> H -> W+W- in p (p) over bar collisions at the Fermilab Tevatron Collider at root s = 1.96 TeV. With 4.8 fb(-1) of integrated luminosity analyzed at CDF and 5.4 fb(-1) at D0, the 95% confidence level upper limit on sigma(gg -> H) x B(H -> W+W-) is 1.75 pb at m(H) = 120 GeV, 0.38 pb at m(H) = 165 GeV, and 0.83 pb at m(H) = 200 GeV. Assuming the presence of a fourth sequential generation of fermions with large masses, we exclude at the 95% confidence level a standard-model-like Higgs boson with a mass between 131 and 204 GeV.We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by DOE and NSF (USA), CONICET and UBACyT (Argentina), CNPq, FAPERJ, FAPESP and FUNDUNESP (Brazil), CRC Program, CFI, NSERC and WestGrid Project (Canada), CAS and CNSF (China), Colciencias (Colombia), MSMT and GACR (Czech Republic), Academy of Finland (Finland), CEA and CNRS/IN2P3 (France), BMBF and DFG (Germany), Ministry of Education, Culture, Sports, Science and Technology (Japan), World Class University Program, National Research Foundation (Korea), KRF and KOSEF (Korea), DAE and DST (India), SFI (Ireland), INFN (Italy), CONACyT (Mexico), NSC(Republic of China), FASI, Rosatom and RFBR (Russia), Slovak R&D Agency (Slovakia), Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010 (Spain), The Swedish Research Council (Sweden), Swiss National Science Foundation (Switzerland), FOM (The Netherlands), STFC and the Royal Society (UK), and the A.P. Sloan Foundation (USA).Peer reviewe

Verrucous carcinoma of the oral mucosa: an epidemiological and follow-up study of patients treated with surgery in 5 last years

Introduction: Oral Verrucous Carcinoma (OVC) is described apart of the Squamous Cell Carcinoma (SCC) due to its specific properties. The objective of our study is to show our series of cases of OVC and to compare with the SCC in terms of clinical manifestations, epidemiology, histopathology, treatment and follow-up. Material and Methods: This is a retrospective study of all the OVC treated in our department between January- 2007 and December-2011. The analyzed variables were sex, age, localization in the oral cavity, histopathology, number of biopsies needed to diagnose OVC, TNM classification, treatment and recurrences during follow-up. Results: Our sample was composed by n=14 patients, 57% female, with a mean age of 69.14 years. The most com - mon localization was buccal mucosa (n=5). Seven patients were diagnosed of OVC with the first biopsy. TNM classification was: pT1: 7 patients, pT2: 3 patients, pT3: 3 patients, pT4: 1 patient. No cervical metastases were observed either in cervical neck dissection or during the follow-up of the patients. The treatment was surgery with clinical resection margins up to 1 cm in all cases, followed by radiotherapy in selected cases. Only n=1 patient (7.69%) presented a recurrence after 34 months of follow-up. The overall survival rate was 92.85%. Conclusions: In our population, OVC represents the 6.16% of all oral cavity and oropharynx cancer, and is more frequent in female patients above 70 years old. It uses to rise over a previous lesion, and usually affects the buccal mucosa. In patients with high suspicious lesions, more than one biopsy may be needed to diagnose OVC. No pa - tient showed cervical dissemination. In our experience, treatment based on local resection, without cervical neck dissection, could be a good option for these patients