Assuntos
Transplante de Rim/efeitos adversos , Transtornos Linfoproliferativos/etiologia , Transtornos Linfoproliferativos/patologia , Complicações Pós-Operatórias/etiologia , Complicações Pós-Operatórias/patologia , Toxoplasmose Cerebral/patologia , Adulto , Diagnóstico Diferencial , Feminino , Humanos , Transtornos Linfoproliferativos/diagnóstico por imagem , Imageamento por Ressonância Magnética , Espectroscopia de Ressonância Magnética , Complicações Pós-Operatórias/diagnóstico por imagem , Toxoplasmose Cerebral/diagnóstico por imagemRESUMO
Ilustramos este ensaio iconográfico de linfoma do sistema nervoso central com imagens de ressonância magnética obtidas em nosso serviço nos últimos 13 anos e discutimos algumas das principais características radiológicas deste tipo de linfoma, primário e secundário. O linfoma sistema nervoso central é um tumor relativamente infrequente, mas alguns achados na ressonância magnética podem sugerir este diagnóstico.
The authors illustrate the present pictorial essay about central nervous system lymphoma with magnetic resonance images obtained in their institution over the past 13 years. Some of the main radiological findings in primary and secondary presentations of this type of lymphoma are discussed. Central nervous system lymphoma is a relatively uncommon tumor, but magnetic resonance imaging findings may suggest the diagnosis.
Assuntos
Humanos , Masculino , Feminino , Pré-Escolar , Adulto Jovem , Pessoa de Meia-Idade , Sistema Nervoso Central , Diagnóstico Diferencial , Linfoma/diagnóstico , Espectroscopia de Ressonância Magnética , Imagem de Difusão por Ressonância MagnéticaRESUMO
OBJECTIVE: This paper aimed at studying presentations of the central nervous system (CNS) lymphoma using structural images obtained by magnetic resonance imaging (MRI). METHODS: The MRI features at presentation of 15 patients diagnosed with CNS lymphoma in a university hospital, between January 1999 and March 2011, were analyzed by frequency and cross tabulation. RESULTS: All patients had supratentorial lesions; and four had infra- and supratentorial lesions. The signal intensity on T1 and T2 weighted images was predominantly hypo- or isointense. In the T2 weighted images, single lesions were associated with a hypointense signal component. Six patients presented necrosis, all of them showed perilesional abnormal white matter, nine had meningeal involvement, and five had subependymal spread. Subependymal spread and meningeal involvement tended to occur in younger patients. CONCLUSION: Presentations of lymphoma are very pleomorphic, but some of them should point to this diagnostic possibility.
Assuntos
Neoplasias do Sistema Nervoso Central/diagnóstico , Linfoma/diagnóstico , Imageamento por Ressonância Magnética , Adulto , Fatores Etários , Idoso , Biópsia , Sistema Nervoso Central/patologia , Neoplasias do Sistema Nervoso Central/patologia , Meios de Contraste , Feminino , Humanos , Linfoma/patologia , Masculino , Pessoa de Meia-Idade , Necrose , Fatores Sexuais , Estatísticas não Paramétricas , Adulto JovemRESUMO
OBJECTIVE: This paper aimed at studying presentations of the central nervous system (CNS) lymphoma using structural images obtained by magnetic resonance imaging (MRI). METHODS: The MRI features at presentation of 15 patients diagnosed with CNS lymphoma in a university hospital, between January 1999 and March 2011, were analyzed by frequency and cross tabulation. RESULTS: All patients had supratentorial lesions; and four had infra- and supratentorial lesions. The signal intensity on T1 and T2 weighted images was predominantly hypo- or isointense. In the T2 weighted images, single lesions were associated with a hypointense signal component. Six patients presented necrosis, all of them showed perilesional abnormal white matter, nine had meningeal involvement, and five had subependymal spread. Subependymal spread and meningeal involvement tended to occur in younger patients. CONCLUSION: Presentations of lymphoma are very pleomorphic, but some of them should point to this diagnostic possibility.
OBJETIVO: Este trabalho teve como objetivo estudar as apresentações do linfoma do sistema nervoso central (SNC) por meio de imagens estruturais, obtidas por ressonância magnética (RM). MÉTODOS: Foram analisadas as características das imagens por RM, à apresentação, de 15 pacientes diagnosticados com linfoma do SNC em um hospital universitário, entre janeiro de 1999 e março de 2011, pela frequência e por tabulação cruzada. RESULTADOS: Todos os pacientes apresentaram lesões supratentoriais; em quatro (27 por cento) havia lesões infra e supratentoriais. A intensidade do sinal em T1 e T2 foi predominantemente hipo ou isointensa. Lesões únicas foram associadas ao componente de sinal hipointenso nas imagens ponderadas em T2. Seis pacientes apresentaram necrose. Foram encontrados: alteração de sinal da substância branca perilesional em todos os pacientes, acometimento meníngeo em nove e disseminação subependimária em cinco. Disseminação subependimária e acometimento meníngeo tenderam a ocorrer nos pacientes mais jovens. CONCLUSÃO: As apresentações do linfoma no SNC são pleomórficas, mas algumas delas podem apontar para essa possibilidade diagnóstica.
Assuntos
Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem , Neoplasias do Sistema Nervoso Central/diagnóstico , Linfoma/diagnóstico , Imageamento por Ressonância Magnética , Fatores Etários , Biópsia , Meios de Contraste , Neoplasias do Sistema Nervoso Central/patologia , Sistema Nervoso Central/patologia , Linfoma/patologia , Necrose , Fatores Sexuais , Estatísticas não ParamétricasRESUMO
BACKGROUND: The study aims to examine whether the end of specialty in trauma surgery in 2003 influenced the scientific productivity of the area in Brazil. METHODS: We identified and classified the manuscripts and their authors, from databases such as PubMed, Scielo and Plataforma Lattes and sites like Google, in addition to the list of members of SBAIT, the sole society in Brazil to congregate surgeons involved in trauma care in the country. We applied statistical tests to compare the periods of 1997-2003 and 2004-2010. We also analyzed the following variables: impact factor of journals in which manuscripts were published, journals, regional origin of authors, time since graduation, and conducting post-doctorate abroad. RESULTS: We observed a significant increase in publication rates of the analyzed groups over the years. There was a predominance of quantitative studies from the Southeast (especially the state of São Paulo). More time elapsed after graduation and the realization of postdoctoral studies abroad influenced the individual scientific productivity. CONCLUSION: The number of articles published by authors from the area of trauma has been growing over the past 14 years in Brazil. The end of the specialty in trauma surgery in the country did not influence the scientific productivity in the area.
RESUMO
OBJECTIVE: To assess the proportion of papers presented at the XXI Panamerican Congress of Trauma, VIII Congress of the Brazilian Society of Integrated Assistance to the Traumatized (SBAIT) and X Brazilian Congress of Trauma Leagues (CoLT) that were published in full. METHODS: In the events cited, based in Campinas in 2008, 347 papers abstracts of were presented and published. To evaluate the proportion of complete published works a retrospective observational study was conducted, reviewing the biomedical databases PubMed and SciELO, with support from Google, from the title of the abstracts and list of authors. RESULTS: Of 347 papers considered, 25 (7.3%) were from foreign services and 322 (92.7%) national. Ten (2.9%) papers were published, of which six (1.7%) of nursing and four (1.2%) medical. Among these, four thesis publications were identified and only one international work has been published. CONCLUSION: Despite a large number of papers presented at trauma conferences in Brazil, the publications in this area are rare. The academy and the societies of surgery need to encourage the submission of scientific papers even before the presentation in Congresses in order for them to be evaluated for publication in indexed journals.
