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.

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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.

CASEA 51-year-old immunocompetent man presented left-side third nerve palsy. He had previously been diagnosed eight years earlier with an axillary large-cell nonHodgkin lymphoma (NHL), which had been treated with chemotherapy and radiotherapy. MRI showed pineal and hypothalamic lesions (Fig A and B) and computed tomography of the abdomen showed a spleen lesion. After splenectomy, the diagnosis of NHL was made. Laboratory findings showed enhanced serum lactate dehydrogenase (LDH) levels (594 U/l; reference value: 479 U/l) and enhanced IgG levels in the cerebrospinal fluid (15.4 mg/ dl; reference value: 3.4 mg/dl). Increased protein content and cell counts in the cerebrospinal fluid were also observed. The patient was treated with chemotherapy. Eleven months later, the pineal and hypothalamic lesions had disappeared, but a lesion had appeared in the right inferior horn of the right lateral ventricle (Fig C and D).

BackgroundThe study aims to examine whether the end of specialty in trauma surgery in 2003 influenced the scientific productivity of the area in Brazil.MethodsWe 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.ResultsWe 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.ConclusionThe 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.

A 6-year-old boy with focal seizures and headache. Diagnostic imaging demonstrated a right subcortical parietooccipital heterogeous expansive lesion, with growth into the adjacent ventricular system (Fig 1). Histological analysis led to the diagnosis of tanycytic ependymoma, as tumor cells have features resembling tanycytes (Fig 2). More than half of these tumors occur in the spinal cord. Supratentorial location is very rare, and may arise, as in this case, around the ventricle or from subcortical white matter 1-3 .

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.