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Magnetic resonance imaging textural evaluation of posterior cranial fossa tumors in childhood; Avaliacao textural por ressonancia magnetica dos tumores da fossa posterior em criancas. To distinguish healthy from pathological tissues in pediatric patients with posterior cranial fossa tumors using calculated textural parameters from magnetic resonance images.

We evaluated 14 pediatric patients with posterior cranial fossa tumors using the software MaZda to define the texture parameters in selected regions of interest representing healthy and pathological tissues based on T2-weighted magnetic resonance images. There was a statistically significant difference between normal and tumoral tissues as well as between supposedly normal tissues adjacent and distant from the tumoral lesion. Magnetic resonance textural evaluation is an useful tool for determining differences among various tissues, including tissues that appear apparently normal on visual analysis.

Computed tomography evaluation of mast cell tumours; Avaliacao por tomografia computadorizada dos mastocitomas. Faculdade de Medicina Veterinaria e Zootecnia. The mast cell tumours are common tumours of the canine skin.

Computed tomography CT has assumed an important role in tumours evaluation and staging. The aim of this study was to evaluate the role of CT as a method of assessing characteristics of mast cell tumors.

Ten dogs with mast cell tumor were evaluated. CT was performed before and after the intravenous injection of hydro soluble ionic iodine. Attenuation, contrast enhancement, cleavage with adjacent tissues and the unidimensional measurement of each lesion was determined in it maximum diameter, in transversal plane.

This information can help in directing the patients that will be undergoing chemotherapy or surgery. Tumor vasoproliferativo de retina.: Reporte de dos casos Vasoproliferative retinal tumor.: Report of two cases. Directory of Open Access Journals Sweden. Vasoproliferative retinal tumor is a rare and benign condition that presents as an exudative lesion in the peripheral retina. The lesion can be classified in primary idiopathic or secondary to other ocular processes.

Therapeutic options include observation, cryotherapy, laser photocoagulation, surgical removal by pars plana vitrectomy, photodynamic therapy and epiescleral brachytheraphy with radio-active isotopes associated or not to the use of anti-angiogenic or anti-inflammatory drugs. The selection of a particular management modality depends on the type of case. Two female patients affected with this condition were presented; the most important characteristics in their clinical pictures, as well as the results of other tests as retinography, fluorescent and ICG angiography and echography were described.

The management and the therapeutical and evolutive course of both patients were also discussed.

Lists the commands to be catceismo, gives examples, and explains the use of each. Current diagnostic approach cateciwmo bone tumors in childhood; Abordagem diagnostica atual dos tumores osseos na infancia.

The authors analyze the magnetic resonance imaging MRI as the imaging modality of choice for evaluation of patients with bone tumors or soft tissue tumors.

The advent of such a sensitive imaging modality is fortuitous and coincides with a recent change in the therapeutic approach to primary bone tumors. MRI is extremely valuable in monitoring the tumor response to the initial chemotherapy and is accurate defining the margins of tumorfacilitating planning of limb salvage surgical procedures. Evaluation of effects of ionizing radiation hedielberg materials used in dental restorations; Avaliacao dos efeitos da radiacao ionizante em materiais utilizados em restauracoes dentarias.

This work consisted of quantitative studies of the effects caused by ionizing radiation on materials used in dental restorations Titanium, Amalgam, Resin Composite and Glass Ionomer aiming the deleterious effects of radiotherapy when patients with tumors in head and neck, arising when the teeth are restored within in expilcado field of radiation.


The samples were analyzed by X-ray fluorescence techniques to compare the chemical composition before and after the irradiation. The sample were submitted to Geiger-Mueller detectors and the ionization chambers in order to verify any residual radiation in the samples. The samples were also analyzed by gamma spectrometry by a Germanium detector. These tests were performed to determine small changes in the composition in the samples due to the radiation interaction.

The results of this study may encourage the development of new research for alternative materials in dental restorations that can contribute to improve the quality of life of those patients with tumors of the mouth. Recent advances in ultrasound have optimized the detection of liver tumors and helped to improve the prognosis of patients with this condition as newly developed and improved therapeutic modalities have been established.

The authors review important Doppler findings which may help in the identification and characterization of some hepatic tumors through the evaluation of color Doppler, pulsed Doppler and power Doppler features.

New imaging methods such as the use of harmonics imaging are also reviewed. Magnetic resonance imaging in the evaluation of standard radiotherapy field borders in patients with uterine cervix cancer;Ressonancia magnetica para avaliacao dos limites dos campos classicos de radioterapia em pacientes portadoras de neoplasia maligna de colo uterino.

The parameters assessed were the anterior and posterior field borders on sagittal section. The anterior field border was inappropriate in 20 The inappropriateness of both field borders did not correlate with clinical parameters such as patients’ age, tumor staging, histological type and degree.

Diagnosis and evaluation of surveying examination by intracranial tumor in dogs CT; Diagnostico e avaliacao topografica de neoplasias intracranianas pelo exame de TC em caes.

The use of computed tomography CT revolutionized image diagnostic in veterinary medicine and currently can be considered one of the most useful tools for the imaging evaluation of intracranial tumor in dogs. Computed tomography of the brain in small animals allows visualization of intracranial tumorcompression of adjacent structures such as cerebral parenchyma, falx or lateral ventricles, and evaluate secondary hemorrhages and edema.

The CT imaging provides essential information to indicate the surgical approach for a possible tumor resection or biopsy, including the correct location and boundaries structures involved, and also can be used to monitor the clinical treatment.

However, only histopathological examination is able to confirm the final diagnosis. As vantagens da via cisternal para colheita do liquor foram assinaladas. A xantocromia foi dominante nos casos de hematoma. Computed tomography of mast cell tumors in dogs: Curso de Medicina Veterinaria. Nineteen dogs with mast cell tumors treated with chemotherapy were evaluated by computed tomography CT. Were evaluated aspects related to contours, attenuation, postcontrast enhancement and presence of cleavage with adjacent structures.

The mast cell tumors presented a homogeneous or heterogeneous attenuation, presented more frequently a well delineated and regular contours and moderate enhancement after intravenous administration of the iodinated contrast media.

The methods RECIST and volumetric measurements showed an excellent agreement to the classification of therapeutic response, providing a good parameter of the response to treatment. The CT examination proved to be useful in the delimitation of the tumor and an important tool for planning of surgical margins.

Immunohistochemical evaluation was performed to study the histogenesis of canine mammary tumors and to contribute to a better understanding of their classification.

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Monoclonal antibodies specific for different types of intermediate filaments cytokeratins, vimentin, alpha-actin were used. Epithelial cells stained positively for cytokeratins and their expression was lost as the malignant transformation occurs. Myoepithelial cells stained positively heideberg vimentin and alpha-actin. In contrast to vimentin, alpha-actin lost the expression as the cartilaginous or osseous metaplasia occurs. Immunohistochemical evaluation with monoclonal antibodies heidrlberg to be efficient for identification explicaddo tumor histogenesis.


In contrast to vimentin, alpha-actin lost the expression. Radiation therapy for glomus tumors of the temporal bone; Tratamento radioterapico dos tumores glomicos do osso temporal. The treatment of glomic tumors has been controversial since its first description. It can be done with surgery, radiotherapy or just expectation.

Disease control was determined by 1 no progression of symptoms or cranial nerve dysfunction or 2 no progression of the lesion in radiological follow-up.

It was also evaluated the follow-up period and the sequelae of the treatment. The follow-up period was from 3 to 35 years, with a media of 11,6 years.

The main symptoms were: The signs were pulsate retrotympanic mass, facial palsy and cofosis. The tumors were staged using Fischs classification. The radiotherapy was performed with linear accelerator with dose ranging from in weeks.

In the follow-up period were possible to identify sequelaes like dermatitis, meatal stenosis, cofosis and facial palsy. The type and dosages of the radiotherapy were also the same of others reports. All patients had improvement of the symptoms and only one was not considered as having disease controlled.

Complications were, in general, minor complications, with exception of the cofosis and facial palsy. It should be considered specially in advanced explocado where a surgical procedure could bring a high level of morbidity. Setor de Medicina Nuclear.

The acquisition protocol scintigraphy of neuroendocrine tumor was evaluated and the necessary recommendations for its optimization will be studied to ensure image quality with the least possible expense to the patient.

The majority is diagnosed in asymptomatic patients during routine imaging exams. O heidelbegr de follow-up variou de 3 a 35 anos, com uma media de 11,6 anos.

Os principais sintomas foram: A radioterapia foi realizada com acelerador linear com doses variando de Rads explicqdo semanas.

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Ee treatment of glomic. The use of dynamic computation systems in the evaluation of the damages caused by oil spill; O uso de sistemas computacionais exppicado na avaliacao dos caetcismo causados por derrames de petroleo.

Estuarine areas are zones of great environmental risk characterized as great sensitivity to oil and oil products spills. However, for some groups of organisms, like plankton, the spatial limitations of GIS become inadequate because their distributions exhibits temporal variability and are associated with dynamic environmental factors. Having this in mind, the development of a specific tool ctecismo necessary to supply this need. These groups have an accentuated sensitivity to oil spills.

This impact could directly affect the environment quality and indirectly the local fishing resource. SIDIPLA is elaborated from data reports covering every estuarine area and graphs are generated containing abundance of the species of fish larvae and eggs from the geographical position, season, temperature and salinity; selected by the user from an Internet page http: Several simulations demonstrated the strength of the system and its easy use.

Furthermore this tool can be implemented in different places of the Brazilian coast and different groups of organisms. Technical evaluation of thermodynamics processes; Avaliacao tecnica dos processos termodinamicos. An evaluation of thermodynamic processes, energy losses the origin of energy losses on thermodynamic process, where are the points or sources of those losses and variation of process when compared in relation of thermodynamic performance are discussed.

The concept of energy explicadk and its origin, energy and work capacity, performance rates and examples of thermodynamic efficiency are heidelbsrg debated 3 figs. Radiologic evaluation of facial injury; Avaliacao radiologica dos traumatismos faciais.