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Search Results: 1 - 10 of 8179 matches for " Bruno Arroja "
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Gummatous hepatic syphilis simulating malignancy Sífilis hepática simulando metastiza o hepática
Bruno Arroja,Isabel Cotrim,Martinha Henrique
Jornal Português de Gastrenterologia , 2012,
Abstract:
Kaposi's sarcoma of the rectum Sarcoma de Kaposi del recto
Sheila Ferreira,Bruno Arroja,Manuela Canhoto,Cristina Amado
Revista Espa?ola de Enfermedades Digestivas , 2011,
Abstract:
Gastric splenosis: a rare cause of digestive bleeding Esplenosis gástrica: una causa rara de hemorragia digestiva
Bruno Arroja,Nuno Almeida,Charl Rafael Macedo,Ana Paula Moreira
Revista Espa?ola de Enfermedades Digestivas , 2011,
Abstract:
Fistuliza o enterocutanea em doen a de Crohn severa Enterocutaneous fistula in severe Crohn’s disease
Bruno Arroja,Manuela Canhoto,Cláudia Gon?alves,Filipe Silva
Jornal Português de Gastrenterologia , 2010,
Abstract:
Anorectal Melanoma Melanoma Anorectal
Bruno Arroja,Manuela Canhoto,Cláudia Gon?alves,Filipe Silva
Jornal Português de Gastrenterologia , 2010,
Abstract:
Invasive amebiasis Amebíase invasiva
Bruno Arroja,Sheila Ferreira,Manuela Canhoto,Cláudia Gon?alves
Jornal Português de Gastrenterologia , 2010,
Abstract: Amebiasis is a relatively common infection in developing countries. Entamoeba histolytica is the parasitic agent responsible for invasive forms of this disease. Abdominal pain and hepatomegaly are classical findings when liver is affected and in some cases large volume abscesses may develop. Despite the mainstay for treatment remains antibiotics, interventional radiology techniques may be useful in more complicated cases. This report presents a case of invasive amebiasis affecting both the colon and liver of a 75 year old male. Diagnosis, treatment options and follow-up are discussed. The importance of abscess CT guided punction in specific lesions is emphasized. A amebíase constitui uma forma comum de infec o gastrointestinal nos países subdesenvolvidos, sendo a Entamoeba histolytica o agente parasitário responsável pelas formas invasivas da doen a. A dor abdominal e a hepatomegalia s o características clínicas típicas das situa es em que se verifica envolvimento hepático, estando descritos na literatura casos de abcessos hepáticos volumosos. Ainda que a antibioterapia seja a base do tratamento, alguns casos mais complexos porém, exigem o recurso a outro tipo de técnicas diferenciadas, nomeadamente as de radiologia interventiva. Os autores reportam um caso de amebíase invasiva com atingimento intestinal e hepático num homem de 75 anos de idade. S o discutidos o diagnóstico diferencial, as op es terapêuticas disponíveis e a evolu o da doen a.
Invasive amebiasis
Arroja,Bruno; Ferreira,Sheila; Canhoto,Manuela; Gon?alves,Cláudia; Silva,Filipe; Cotrim,Isabel; Vasconcelos,Helena; Pardal,Vítor;
Jornal Português de Gastrenterologia , 2010,
Abstract: amebiasis is a relatively common infection in developing countries. entamoeba histolytica is the parasitic agent responsible for invasive forms of this disease. abdominal pain and hepatomegaly are classical findings when liver is affected and in some cases large volume abscesses may develop. despite the mainstay for treatment remains antibiotics, interventional radiology techniques may be useful in more complicated cases. this report presents a case of invasive amebiasis affecting both the colon and liver of a 75 year old male. diagnosis, treatment options and follow-up are discussed. the importance of abscess ct guided punction in specific lesions is emphasized.
A note on the equivalence of a barotropic perfect fluid with a K-essence scalar field
Frederico Arroja,Misao Sasaki
Physics , 2010, DOI: 10.1103/PhysRevD.81.107301
Abstract: In this short note, we obtain the necessary and sufficient condition for a class of non-canonical single scalar field models to be exactly equivalent to barotropic perfect fluids, under the assumption of an irrotational fluid flow. An immediate consequence of this result is that the non-adiabatic pressure perturbation in this class of scalar field systems vanishes exactly at all orders in perturbation theory and on all scales. The Lagrangian for this general class of scalar field models depends on both the kinetic term and the value of the field. However, after a field redefinition, it can be effectively cast in the form of a purely kinetic K-essence model.
Strong scale dependent bispectrum in the Starobinsky model of inflation
Frederico Arroja,Misao Sasaki
Physics , 2012, DOI: 10.1088/1475-7516/2012/08/012
Abstract: We compute analytically the dominant contribution to the tree-level bispectrum in the Starobinsky model of inflation. In this model, the potential is vacuum energy dominated but contains a subdominant linear term which changes the slope abruptly at a point. We show that on large scales compared with the transition scale $k_0$ and in the equilateral limit the analogue of the non-linearity parameter scales as $(k/k_0)^2$, that is its amplitude decays for larger and larger scales until it becomes subdominant with respect to the usual slow-roll suppressed corrections. On small scales we show that the non-linearity parameter oscillates with angular frequency given by $3/k_0$ and its amplitude grows linearly towards smaller scales and can be large depending on the model parameters. We also compare our results with previous results in the literature.
Non-gaussianity from the trispectrum in general single field inflation
Frederico Arroja,Kazuya Koyama
Physics , 2008, DOI: 10.1103/PhysRevD.77.083517
Abstract: We compute the fourth order action in perturbation theory for scalar and second order tensor perturbations for a minimally coupled single field inflationary model, where the inflaton's lagrangian is a general function of the field's value and its kinetic energy. We obtain the fourth order action in two gauges, the comoving gauge and the uniform curvature gauge. Using the comoving gauge action we calculate the trispectrum at leading order in slow-roll, finding agreement with a previously known result in the literature. We point out that in general to obtain the correct leading order trispectrum one cannot ignore second order tensor perturbations as previously done by others. The next-to-leading order corrections may become detectable depending on the shape and we provide the necessary formalism to calculate them.
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