oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 1 )

2019 ( 17 )

2018 ( 28 )

2017 ( 42 )

Custom range...

Search Results: 1 - 10 of 20509 matches for " Vianna Alberto Domingues "
All listed articles are free for downloading (OA Articles)
Page 1 /20509
Display every page Item
Calcifica es malignas da mama: correla o mamografia-anatomia patológica
Vianna Alberto Domingues
Radiologia Brasileira , 2001,
Abstract:
Calcifica??es malignas da mama: correla??o mamografia-anatomia patológica
Vianna, Alberto Domingues;Marchiori, Edson;
Radiologia Brasileira , 2002, DOI: 10.1590/S0100-39842002000300003
Abstract: we carried out 30 comparison studies to establish the relationship between mammography and pathology findings in 29 patients with malignant breast tumors that presented calcifications associated with the lesion on the mammograms. the main purpose of this work was to verify whether the shapes of the calcifications correspond to specific types of tumor, and could be related to the location they originate from. two objective features of the calcifications observed on the mammograms were studied: shape and distribution. this study showed that carcinomas of the comedo type presented a high frequency of pleomorphic calcifications (95.5%) and a ductal distribution pattern in 66.5% of the cases. cribriform carcinomas that were not associated to the comedo type presented only round calcifications in 66.5% of the cases, prevailing an undefined distribution pattern (78.5%). micropapillary tumors that were not associated to the comedo type presented only round calcifications in 66.5% of the cases, prevailing an undefined distribution pattern (66.5%). none of the tumors showed a lobular distribution pattern. shapeless calcifications in the absence of a tumoral nodule may be suggestive of infiltrative ductal carcinoma. considering the histological architectural pattern of the 30 tumors, 24 (80%) showed the expected calcification shapes.
Calcifica es malignas da mama: correla o mamografia-anatomia patológica
Vianna Alberto Domingues,Marchiori Edson
Radiologia Brasileira , 2002,
Abstract: Neste trabalho foram realizados 30 estudos de correla o entre os achados da mamografia e da anatomia patológica em 29 pacientes com tumores malignos na mama, cujas mamografias apresentaram calcifica es relacionadas com as les es. Os objetivos principais foram: verificar se as formas das calcifica es corresponderam a tipos específicos de tumores e se as formas das calcifica es estavam relacionadas aos locais onde eram formadas. Foram estudados dois aspectos objetivos das calcifica es identificados nas mamografias: forma e distribui o. Este estudo concluiu que os carcinomas tipo comedo tiveram elevada freqüência de calcifica es pleomorfas (95,5%) e padr o de distribui o ductal em 66,5% dos casos. Os carcinomas tipo cribriforme, quando n o associados ao tipo comedo, evidenciaram somente calcifica es arredondadas em 66,5% dos casos e predominancia de distribui o indefinida (78,5%). Os tumores micropapilares, quando n o associados ao tipo comedo, mostraram somente calcifica es arredondadas em 66,5% dos casos e predominancia do padr o de distribui o indefinido (66,5%). Nenhum tumor mostrou padr o de distribui o lobular. Calcifica es amorfas na ausência de nódulo tumoral s o suspeitas de carcinoma ductal infiltrante. De acordo com o padr o histológico arquitetural dos 30 tumores, 24 (80%) tiveram calcifica es com as formas esperadas.
Calcifica??es arredondadas como único achado mamográfico no carcinoma da mama: correla??o mamografia-anatomia patológica
Vianna, Alberto Domingues;Marchiori, Edson;Vianna, Alexandre de Souza;Vianna, Pedro Erthal de Souza;
Radiologia Brasileira , 2005, DOI: 10.1590/S0100-39842005000300003
Abstract: objective: to determine the relationship between mammography findings and pathology results in patients with breast tumors associated with round calcifications. materials and methods: we analyzed 16 patients with malignant breast tumors whose mammograms showed round calcifications as the sole finding. the histological types, number of calcifications and the most frequent distribution patterns were studied. results: the most common histological type of these tumors was cribriform carcinoma in 42.9% of the cases, followed by micropapillary carcinoma (23.8%), comedo (19%) and infiltrating ductai carcinoma (9.5%). association of two or more histological types was seen in five cases in a total of 21 tumors. uncharacteristic distribution pattern was observed in 56% of the cases, ductal pattern in 31.5% and lobular pattern in 12.5%. regarding the number of calcifications, more than 20 calcifications were seen in 75% of the cases, between 10 and 20 calcifications in 12.5%, and less than 10 calcifications in 12.5%. conclusion: malignant breast tumors may present round calcifications as the sole mammographic finding. these calcifications may present a lobular, ductal or uncharacteristic pattern of distribution.
Canceriza??o de lóbulos: correla??o de achados mamográficos e histológicos
Vianna, Alberto Domingues;Gasparetto, Taísa Davaus;Torres, Gisela Costa;Saddy, José Carlos;Marchiori, Edson;
Radiologia Brasileira , 2011, DOI: 10.1590/S0100-39842011000500003
Abstract: objective: to characterize the mammographic appearance of cancerization of lobules by ductal carcinoma in situ (dcis), by correlating imaging and histological findings. materials and methods: this retrospective study was based on a review of the histopathological reports of 135 patients who underwent breast biopsy. a diagnosis of cancerization of lobules by dcis was confirmed in 12 patients. two cases were excluded because the histopathological sections were not available to correlate pathological and mammographic findings. all mammograms were retrospectively reviewed and categorized by two experienced breast radiologists, with no knowledge of the histological findings. results: nine cases (90%) presented clusters of round microcalcifications, and one (10%) had round and linear calcifications. the distribution of the calcifications was defined as lobular in all the cases. histopathological study showed four cases of cribriform dcis, two cases of comedo dcis, one case of solid dcis, one case of cribriform associated with solid dcis, and one case of cribriform associated with solid and comedo dcis. in the case showing round and linear calcifications, the histological subtype was cribriform dcis. with respect to the number of microcalcifications, nine cases presented more than 20, and only one case showed less than 10 microcalcifications. conclusion: in our cohort, the mammographic evaluation of patients with dcis presenting cancerization of lobules demonstrated clusters of microcalcifications in a lobular distribution. although clusters of round calcifications are typically associated with a benign process, cancerization of lobules by dcis may produce a similar pattern, thus mimicking a benign condition.
Opacidades em vidro fosco nas doen as pulmonares difusas: correla o da tomografia computadorizada de alta resolu o com a anatomopatologia
Santos Maria Lúcia de Oliveira,Marchiori Edson,Vianna Alberto Domingues,Souza Jr. Arthur Soares
Radiologia Brasileira , 2003,
Abstract: Opacidade em vidro fosco é achado freqüentemente visto na tomografia computadorizada de alta resolu o do tórax e se traduz pelo aumento do coeficiente de atenua o dos pulm es, mas sem apagar as marcas broncovasculares. Por sua inespecificidade, a associa o com outros achados radiológicos, clínicos e anatomopatológicos deve ser considerada para uma interpreta o diagnóstica mais correta. Neste trabalho foram analisados 62 exames tomográficos de pacientes com doen as pulmonares difusas, de 14 etiologias diferentes, em que opacidades em vidro fosco foram o achado único ou predominante, e feita correla o anatomopatológica por meio de biópsias ou necropsias. Na pneumocistose as opacidades em vidro fosco corresponderam, histologicamente, à ocupa o alveolar por material espumoso contendo parasitos; no carcinoma bronquíolo-alveolar, a espessamento dos septos alveolares e ocupa o de sua luz por muco e células tumorais; na paracoccidioidomicose, a espessamento dos septos alveolares, áreas de fibrose e alvéolos contendo exsudato broncopneum nico; na sarcoidose, a fibrose ou a acúmulo de granulomas; na fibrose pulmonar idiopática, a espessamento dos septos alveolares por fibrose; na bronquiolite obliterante com pneumonia em organiza o, a pneumonia intersticial com áreas de organiza o intra-alveolar. A ocupa o alveolar por sangue foi observada nos casos de leptospirose, hemossiderose idiopática, metástases de tumor renal e na aspergilose invasiva; por vacúolos de gordura na pneumonia lipídica; por material protéico e lipoprotéico na silicoproteinose e na proteinose alveolar; e por líquido de edema na insuficiência cardíaca congestiva.
Opacidades em vidro fosco nas doen?as pulmonares difusas: correla??o da tomografia computadorizada de alta resolu??o com a anatomopatologia
Santos, Maria Lúcia de Oliveira;Marchiori, Edson;Vianna, Alberto Domingues;Souza Jr., Arthur Soares;Moraes, Heleno Pinto de;
Radiologia Brasileira , 2003, DOI: 10.1590/S0100-39842003000600003
Abstract: ground-glass opacity is a finding frequently seen in high-resolution computed tomography examinations of the chest and is characterized by hazy increased attenuation of lung, however without blurring of bronchial and vascular margins. due to its unspecificity, association with other radiological, clinical and pathological findings must be considered for an accurate diagnostic interpretation. in this paper were reviewed 62 computed tomography examinations of patients with diffuse pulmonary diseases of 14 different etiologies in which ground-glass opacity was the only or the most remarkable finding, and correlated this findings with pathology abnormalities seen on specimens obtained from biopsies or necropsies. in pneumocystosis, ground-glass opacities correlated histologically with alveolar occupation by a foaming material containing parasites, in bronchioloalveolar cell carcinoma with thickening of the alveolar septa and occupation of the lumen by mucus and tumoral cells, in paracoccidioidomycosis with thickening of the alveolar septa, areas of fibrosis and alveolar bronchopneumonic exsudate, in sarcoidosis with fibrosis or clustering of granulomas and in idiopathic pulmonary fibrosis with alveolar septa thickening due to fibrosis. alveolar occupation by blood was found in cases of leptospirosis, idiopathic hemosiderosis, metastatic kidney tumor and invasive aspergillosis whereas oily vacuoli were seen in lipoid pneumonia, proteinaceus and lipoproteinaceus material in silicoproteinosis and pulmonary alveolar proteinosis, and edematous fluid in cardiac failure.
Osteossarcoma parosteal: aspectos na radiologia convencional
Nanci Neto, Francisco;Marchiori, Edson;Vianna, Alberto Domingues;Aymoré, Ierecê Lins;Almeida, Ana Luiza Brito de;Irion, Klaus L.;Collares, Felipe Birchal;
Radiologia Brasileira , 2007, DOI: 10.1590/S0100-39842007000200004
Abstract: objective: to evaluate the most significant features of parosteal osteosarcoma and to describe the most frequent findings on conventional radiology. materials and methods: a retrospective study was performed including 26 cases of patients with parosteal osteosarcoma from the archives of "clube do osso", rio de janeiro, rj, brazil, with analysis of main clinical and radiological findings. results: the disease was prevalent in female patients in the third decade of life. main clinical findings were the increase in volume on the site of the tumor (77% of cases) and local pain (68% of cases). the most frequent site of tumor was the popliteal fossa (40%), and metaphyseal involvement has occurred in 92% of cases. the most frequent radiological findings were densely mineralized lesions on juxtacortical locations, and irregularly thickened adjacent host cortex (92.3%), with adherence areas being observed in 88.5% of cases, besides lobular (50%) or irregular (38.5%) tumor margins. also, a radiolucent line between the tumor and the adjacent bone (48%), a denser mineralization on the basis than in the periphery of the tumor (42.3%), and a small rate of periosteal reaction (15.4%) were found. conclusion: although computed tomography and magnetic resonance imaging are important modalities for identifying some aspects of parosteal osteosarcoma, conventional x-ray is essential in the initial evaluation of this type of lesion, most frequently allowing differential diagnosis with other surface bone lesions.
Paravertebral Mass in a Patient with Hemolytic Anemia: Computed Tomographic Findings
Juliana Fran a Carvalho,Edson Marchiori,Gláucia Zanetti,Claudia Mauro Mano,Branca Sarcinelli-Luz,Flávia Gavinho Vianna,Carla Assed,Isabella Guedes Santos,Alair Augusto S. M. D. Santos,Alberto Domingues Vianna
Case Reports in Medicine , 2010, DOI: 10.1155/2010/724279
Abstract: Extramedullary hematopoiesis is characterized by the presence of hematopoietic tissue outside of the bone marrow and is typically associated with chronic hemolytic anemias. Intrathoracic extramedullary hematopoiesis is a rare and usually asymptomatic condition. The authors report a case of a 57-year-old man with intrathoracic extramedullary hematopoiesis and hereditary spherocytosis. Clinical and laboratory evaluation, together with radiological findings, are described. The diagnosis of the disease was confirmed by tissue biopsy.
Eficácia e seguran?a de dois inaladores de pó seco usados para a aplica??o de furoato de mometasona em pacientes com asma
Pereira, Carlos Alberto de Castro;Vianna, Flávia Fillardo;Cukier, Alberto;Stelmach, Rafael;Oliveira, Júlio César Abreu de;Carvalho, Erich Vidal;Gomes, Edimar Pedrosa;Mayo, Suzete Varela;Chibante, Ant?nio Monteiro da Silva;Domingues, Cláudia Patrícia;
Jornal Brasileiro de Pneumologia , 2010, DOI: 10.1590/S1806-37132010000400004
Abstract: objective: mometasone furoate (mf) is a new, potent synthetic inhaled corticosteroid. worldwide, mf is administered via a dry-powder inhaler that contains multiple doses. as a preparation that would be more cost-effective, single-dose mf capsules were developed in brazil. the objective of the present study was to evaluate the efficacy and safety of the two inhalers for mf administration in patients with asthma. methods: a randomized, multicenter, open-label, parallel-group clinical trial involving 74 adult patients with moderate, persistent asthma who were randomized into two groups to receive approximately 400 μg of mf once a day for 60 days, either via the multiple-dose inhaler or via the newly developed single-dose inhaler. results: no significant differences were observed between the two groups regarding the primary endpoints (fev1 and rescue medication use) or the secondary endpoints (morning pef, tolerability, and safety, the last as assessed on the basis of hypothalamic-pituitary-adrenal axis function). conclusions: the use of the single-dose inhaler developed in brazil for mf administration is as effective and safe as is that of a standard inhaler in the treatment of patients with asthma.
Page 1 /20509
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.