Homocysteine serum levels in patients with ruptured and unruptured intracranial aneurysms: a case-control study / Homocisteína sérica em pacientes com aneurismas rotos e não rotos: um estudo caso-controle

Abstract Background There is very few data regarding homocysteine's influence on the formation and rupture of intracranial aneurysms. Objective To compare homocysteine levels between patients with ruptured and unruptured intracranial aneurysms, and to evaluate possible influences of this molecule on vasospasm and functional outcomes. Methods This is a retrospective, case-control study. We evaluated homocysteinemia differences between patients with ruptured and unruptured aneurysms; and the association of homocysteine levels with vasospasm and functional outcomes. Logistic regressions were performed. Results A total of 348 participants were included: 114 (32.8%) with previous aneurysm rupture and 234 (67.2%) with unruptured aneurysms. Median homocysteine was 10.75μmol/L (IQR = 4.59) in patients with ruptured aneurysms and 11.5μmol/L (IQR = 5.84) in patients with unruptured aneurysms. No significant association was detected between homocysteine levels and rupture status (OR = 0.99, 95% CI = 0.96-1.04). Neither mild (>15μmol/L; OR = 1.25, 95% CI 0.32-4.12) nor moderate (>30μmol/L; OR = 1.0, 95% CI = 0.54-1.81) hyperhomocysteinemia demonstrated significant correlations with ruptured aneurysms. Neither univariate (OR = 0.86; 95% CI 0.71-1.0) nor multivariable age-adjusted (OR = 0.91; 95% CI = 0.75-1.05) models evidenced an association between homocysteine levels and vasospasm. Homocysteinemia did not influence excellent functional outcomes at 6 months (mRS≤1) (OR = 1.04; 95% CI = 0.94-1.16). Conclusion There were no differences regarding homocysteinemia between patients with ruptured and unruptured intracranial aneurysms. In patients with ruptured aneurysms, homocysteinemia was not associated with vasospasm or functional outcomes.

RESUMO Antecedentes Existem poucos dados sobre a influência da homocisteína na formação e rotura de aneurismas intracranianos (AI). Objetivo Comparar os níveis de homocisteína entre pacientes com AI rotos e não rotos e influências no vasoespasmo e resultados funcionais. Métodos Estudo caso-controle, que avaliou as diferenças de homocisteinemia entre pacientes com aneurismas rotos e não rotos, além da associação entre níveis de homocisteína, vasoespasmo e estado funcional. Regressões logísticas foram realizadas. Resultados Um total de 348 participantes foram incluídos: 114 (32,8%) com aneurismas rotos e 234 (67,2%) não rotos. A homocisteína mediana foi de 10,75μmol/L (IQR = 4,59) nos rotos e 11,5μmol/L (IQR = 5,84) nos não rotos. Não houve associação significativa entre os níveis de homocisteína e o status de ruptura (OR = 0,99, 95% CI = 0,96-1,04). Nem a hiperhomocisteinemia leve (>15μmol/L; OR = 1,25, 95% CI = 0,32-4,12) nem a moderada (>30μmol/L; OR = 1,0, 95% CI = 0,54-1,81) mostraram correlações significativas com aneurismas rotos. Modelos univariados (OR = 0,86; 95% CI = 0,71-1,0) e multivariados ajustados por idade (OR = 0,91; 95% CI = 0,75-1,05) não evidenciaram associação entre homocisteína e vasoespasmo. A homocisteinemia não influenciou resultados funcionais excelentes em seis meses (mRS ≤ 1) (OR = 1,04; 95% CI = 0,94-1,16). Conclusão Não houve diferenças em relação à homocisteinemia entre pacientes com aneurismas intracranianos rotos e não rotos. Em pacientes com aneurismas rotos, a homocisteinemia não foi associada ao vasoespasmo ou resultados funcionais.

Age as a predictive factor for reduced intracranial compliance in patients with headache / Idade como fator preditor de complacência intracraniana reduzida em pacientes com cefaleia

Abstract Background Increased intracranial pressure (ICP) consists of a set of signs and symptoms related to changes in intracranial compliance (ICC) and ICP. Objective This study presents a retrospective analysis of patients who underwent non-invasive monitoring of ICC based on complaints of headache, correlating decreased brain compliance and increased intracranial pressure. Methods Noninvasive ICC monitoring was performed using a Brain4care device, which contains a strain gauge and a recorder connected to a mechanical device that touches the scalp surface in the frontoparietal area lateral to the sagittal suture. This tool monitors the ICP by identifying small changes in skull measurements that are caused by pressure variations, i.e., skull deformation is associated with the detection of changes in mean ICP. A clinical evaluation of 32 patients with complaints of headache occurred from the analysis of their medical records. Results Of the 32 patients initially chosen, it was possible to complete the analysis of 18 due to the availability of data in the medical records. From the non-invasive monitoring of the ICC, the following data were collected: time-to-peak, P2/P1 ratio, age, and gender. From the statistical analysis of age and P2/P1 ratio, it was noted that as age increases, ICC tends to decrease regardless of sex (p < 0.05). Conclusion This study concluded that there is a correlation between changes in intracranial compliance and headache complaints in outpatients. There was also a relationship between age and decreased intracranial compliance but without a specific pain pattern.

Resumo Antecedentes O aumento da pressão intracraniana (PIC) consiste em um conjunto de sinais e sintomas relacionados a mudanças na complacência intracraniana (CIC) e na PIC. Objetivo Este estudo apresenta uma análise retrospectiva de pacientes que foram submetidos ao monitoramento não invasivo da CIC com base em queixas de cefaleia, correlacionando a diminuição da complacência cerebral e o aumento da pressão intracraniana. Métodos O monitoramento não invasivo da CIC foi realizado utilizando um dispositivo Brain4Care, que contém um medidor de tensão e um gravador conectado a um dispositivo mecânico que toca a superfície do couro cabeludo na área frontoparietal lateral à sutura sagital. Esta ferramenta monitora a PIC identificando pequenas alterações nas medidas do crânio que são causadas por variações de pressão, ou seja, a deformação do crânio está associada à detecção de alterações na PIC média. Uma avaliação clínica de 32 pacientes com queixas de cefaleia ocorreu a partir da análise de seus prontuários médicos. Resultados Dos 32 pacientes inicialmente escolhidos, foi possível concluir a análise de 18 devido à disponibilidade de dados nos prontuários médicos. A partir do monitoramento não invasivo da CIC, foram coletados os seguintes dados: time-to-peak, relação P2/P1, idade e sexo. Da análise estatística de idade e relação P2/P1, observou-se que à medida em que a idade aumenta, a CIC tende a diminuir independentemente do sexo (p < 0,05). Conclusão Este estudo concluiu que existe uma correlação entre as mudanças na CIC e a queixa de cefaleia em pacientes ambulatoriais. Houve também uma relação entre idade e diminuição da CIC, mas sem um padrão de dor específico.

Neutrophil-to-lymphocyte and platelet-to-lymphocyte ratios and prognosis after aneurysmal subarachnoid hemorrhage: a cohort study / Razão neutrófilos-linfócitos e razão plaquetas-linfócitos e o prognóstico de hemorragia subaracnóidea aneurismática: um estudo de coorte

Abstract Background Subarachnoid hemorrhage (SAH) prognosis remains poor. Vasospasm mechanism might be associated with inflammation. Neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) have been studied as inflammation markers and prognostic predictors. Objective We aimed to investigate NLR and PLR in admission as predictors of angiographic vasospasm and functional outcome at 6 months. Methods This cohort study included consecutive aneurysmal SAH patients admitted to a tertiary center. Complete blood count was recorded at admission before treatment. White blood cell count, neutrophil count, lymphocyte count, platelet count, NLR, and PLR were collected as independent variables. Vasospasm occurrence-modified Rankin scale (mRS), Glasgow outcome scale (GOS), and Hunt-Hess score at admission and at 6 months were recorded as dependent variables. Multivariable logistic regression models were used to adjust for potential confounding and to assess the independent prognostic value of NLR and PLR at admission. Results A total of 74.1% of the patients were female, with mean age of 55.6 ± 12.4 years. At admission, the median Hunt-Hess score was 2 (interquartile range [IQR] 1), and the median mFisher was 3 (IQR 1). Microsurgical clipping was the treatment for 66.2% of the patients. Angiographic vasospasm incidence was 16.5%. At 6 months, the median GOS was 4 (IQR 0.75), and the median mRS was 3 (IQR 1.5). Twenty-one patients (15.1%) died. Neutrophil-to-lymphocyte ratio and PLR levels did not differ between favorable and unfavorable (mRS > 2 or GOS < 4) functional outcomes. No variables were significantly associated with angiographic vasospasm. Conclusion Admission NLR and PLR presented no value for prediction of functional outcome or angiographic vasospasm risk. Further research is needed in this field.

Resumo Antecedentes O prognóstico da hemorragia subaracnoidea (HSA) permanece ruim. Vasoespasmo pode estar associado à inflamação. Razões neutrófilo-linfócito (NLR) e plaqueta-linfócito (PLR) têm sido estudadas como marcadores de inflamação e prognóstico. Objetivo Investigar NLR e PLR na admissão como preditores de vasoespasmo angiográfico e desfecho aos 6 meses. Métodos Este estudo de coorte incluiu pacientes consecutivos com HSA aneurismática de um centro terciário. Contagem de leucócitos, neutrófilos, linfócitos e plaquetas, proporção de neutrófilos para linfócitos e de plaquetas para linfócitos foram coletados como variáveis independentes. Ocorrência de vasoespasmo, escala de Rankin modificada, escala de desfecho de Glasgow e o escore de Hunt-Hess na admissão e 6 meses após a mesma foram registradas como variáveis dependentes. Modelos de regressão logística multivariável foram usados para ajustar potenciais fatores de confusão e avaliar valor prognóstico independente de NLR e PLR. Resultados Um total de 74,1% pacientes eram do sexo feminino, com idade média de 55,6 ± 12,4 anos. Na admissão, a pontuação média de Hunt-Hess foi de 2 (IQR 1) e a mediana de mFisher foi de 3 (IQR 1). Clipagem microcirúrgica foi o tratamento escolhido para 66,2% dos pacientes. A incidência de vasoespasmo angiográfico foi de 16,5%. Aos 6 meses, a escala de desfecho de Glasgow mediana era 4 (IQR 0,75) e a escala de Rankin modificada mediana era 3 (IQR 1,5). Vinte e um pacientes (15,1%) morreram. Os níveis de NLR e PLR não diferiram entre resultados funcionais favoráveis e desfavoráveis (mRS > 2 ou GOS < 4). Nenhuma variável foi significativamente associada ao vasoespasmo angiográfico. Conclusão Razão neutrófilo-linfócito e a PLR não apresentaram valor preditivo de desfecho funcional ou risco de vasoespasmo angiográfico. Mais pesquisas são necessárias neste campo.

Non-Invasive Study of Intracranial Pressure in Pre- and Post-Chemotherapy Patients for the Treatment of Breast Neoplasia

Introduction: Breast cancer is the most common type among women and brings to them significant organic changes. A new intracranial pressure monitorization method consists of an external system of sensors that detects micrometric deformations on the cranial bones and transmits, in real-time, electrical signals that are visualized on a monitor. Objective: To identify changes in intracranial pressure due to chemotherapy connections through non-invasive methodology. Methods: The present study was conducted at Hospital Santa Casa de Misericordia in the city of Ponta Grossa, PR, Brazil in 2017. The variables P2/P1 ratio (ICP morphological evaluation), laboratory parameters, comorbidities, and clinical aspects of the volunteers were evaluated. The vascular toxicity of chemotherapy often causes endothelial dysfunction, resulting in a loss of vasodilation effects and suppresses anti-inflammatory and vascular repair functions. Results: The values of the P2/P1 ratio before and after chemotherapy were also compared between groups. A statistically significant difference was observed in the pre chemotherapy P2/P1 values compared to the post-chemotherapy values. Conclusion: Variations in ICP may occur in cancer patients. Further studies are necessary to evaluate if this change may contribute to the chemotherapy side effects occurrence.

Role of temporary arterial occlusion in subarachnoid hemorrhage outcomes: a prospective cohort study

Purpose: Temporary arterial occlusion (TAO) is a widespread practice in the surgical treatment of intracranial aneurysms. This study aimed to investigate TAO's role during ruptured aneurysm clipping as an independent prognostic factor on short- and long-term outcomes. Methods: This prospective cohort included 180 patients with ruptured intracranial aneurysms and an indication of microsurgical treatment. Patients who died in the first 12 hours after admission were excluded. Results: TAO was associated with intraoperative rupture (IOR) (odds ratio ­ OR = 10.54; 95% confidence interval ­ 95%CI 4.72­23.55; p < 0.001) and surgical complications (OR = 2.14; 95%CI 1.11­4.07; p = 0.01). The group with TAO and IOR had no significant difference in clinical (p = 0.06) and surgical (p = 0.94) complications compared to the group that had TAO, but no IOR. Among the 111 patients followed six months after treatment, IOR, number of occlusions, and total time of occlusion were not associated with Glasgow Outcome Scale (GOS) in the follow-up (respectively, p = 0.18, p = 0.30, and p = 0.73). Among patients who underwent TAO, IOR was also not associated with GOS in the follow-up (p = 0.29). Conclusions: TAO was associated with IOR and surgical complications, being the latter independent of IOR occurrence. In long-term analysis, neither TAO nor IOR were associated with poor clinical outcomes.

Analysis of serum cholesterol, statins and atherosclerotic plaque in ruptured and unruptured intracranial aneurysm / Análise de colesterol sérico, estatina e placa aterosclerótica em aneurisma intracraniano roto e não roto

Introduction Intracranial aneurysm (IA) is a major healthcare concern. The use of statin to reduce serum cholesterol has shown evidence to reduce cardiovascular risk in various diseases, but the impact on IA has not been described. This study aims to determine whether statin use, and serum cholesterol levels interfere with outcomes after IA event. Methods A cohort of patients with IA was analyzed. Patients social and demographics data were collected.Modified Rankin scale (mRS) score after 6months of follow-up was the endpoint. The data regarding statins use, presence or not of atherosclerotic plaque in radiological images and serum cholesterol of 35 patients were included in our study. Linear regression models were used to determine the influence of those 6 variables in the clinical outcome. Results The prevalence of atherosclerotic plaque, high cholesterol and use of statins was 34.3%, 48.5%, and 14.2%, respectively. Statins and serum cholesterol did not impact the overall outcome,measured by mRS after 6 months (p>0.05), but did show different tendencies when separated by IA rupture status. Serum cholesterol shows na important association with rupture of aneurysm (p»0.0382). High cholesterol and use of statins show a tendency for worse outcome with ruptured aneurysm, and the opposite is true for unruptured aneurysm. The presence of atherosclerotic plaques was not related with worse outcomes. Conclusions Multiple and opposite mechanisms might be involved in the pathophysiology of IA. Ruptured aneurysms are associated with higher levels of serum cholesterol. Serum cholesterol and statins use were not correlated with worse outcomes, but further studies are important to clarify these relationships.

Introdução Aneurisma intracranial (AI) é uma grande preocupação para a saúde. Evidências apontam que o uso de estatina para reduzir o colesterol sérico diminui o risco cardiovascular em diversas doenças, mas o impacto em AI ainda não foi descrito. Este estudo almeja determinar se o uso de estatina e o nível sérico de colesterol interferem no desfecho clínico após a ocorrência de AIs. Métodos Uma coorte de pacientes com AI foi analisada. Os dados sociodemográficos dos pacientes foram coletados. Ao final de 6 meses de acompanhamento, aplicou-se a escala modificada de Rankin (mRS). Os dados sobre uso de estatina, existência de placa aterosclerótica em imagens radiológicas, e colesterol sérico de 35 pacientes foram incluídos no estudo. Modelos de regressão linear foram usados para determinar a influência dessas 6 variáveis nos desfechos clínicos. Resultados A prevalência de placa aterosclerótica, colesterol elevado, e uso de estatina foram respectivamente 34,3%, 48,5% e 14,2%. Estatina e colesterol sérico não impactaram nos desfechos medidos pela mRS em 6 meses (p > 0,05), mas mostraram diferentes tendências quando separados pelo estado de ruptura do AI. Colesterol sérico apresenta uma importante associação com ruptura de aneurisma (p » 0,0382). Colesterol elevado e uso de estatinas representam uma tendência a piores desfechos para aneurismas rompidos, e o oposto é verdade para os não rompidos. A presença de placa aterosclerótica não está relacionada com piores resultados. Conclusões Mecanismos múltiplos e opostos podem estar envolvidos na patofisio logia do AI. Aneurismas rompidos estão associados com maiores níveis de colesterol sérico. Colesterol sérico e estatinas não foram correlacionados com piores desfechos, mas mais estudos são importantes para clarificar a relação entre esses fatores

Microsurgery versus embolization: different risk factors for short- and long- term outcomes of patients with ruptured aneurysms

Purpose: To evaluate the risk factors for poor outcomes after surgical and endovascular treatment of aneurysmal subarachnoid hemorrhage (aSAH). Methods: Patients with ≥ 18-years of age and aSAH were included, while patients who died within 12 h of admission or lost follow-up were excluded. All participants underwent standardized clinical and radiological assessment on admission and were reassessed at discharge and at 6-months follow-up using the Glasgow Outcome Scale (GOS). Results: Death at discharge was associated with female gender, anterior communication artery (ACoA) aneurysm location and presence of atherosclerotic plaque in the surgical group, and with age in the endovascular group. Both groups had clinical condition on follow-up associated with mFisher score on admission and hypertension. GOS on follow-up was also associated with presence of atherosclerotic plaque and multiple aneurysms in surgical group, and with age in endovascular group. Conclusions: Subjects treated surgically are prone to unfavorable outcomes if atherosclerotic plaques and multiple aneurysms are present. In patients with endovascular treatment, age was the main predictor of clinical outcome.

Could outcomes of intracranial aneurysms be better predict using serum creatinine and glomerular filtration rate?

Purpose: To analyze the role of serum creatinine levels as a biomarker of intracranial aneurysm outcomes. Methods: This is a prospective analysis of outcomes of patients with intracranial aneurysm. One hundred forty-seven patients with serum creatinine at admission and 6 months follow up were included. Linear and logistic regressions were used to analyze the data. Modified Rankin scale (mRS) was used to assess outcome. Results: Creatinine level was not directly related to aneurysm outcome nor aneurysm rupture (p > 0.05). However, patients with a glomerular filtration rate (GFR) lower than 72.50 mL·min­1 had an odds ratio (OR) of 3.049 (p = 0.006) for worse outcome. Similarly, aneurysm rupture had an OR of 2.957 (p = 0.014) for worse outcomes. Stepwise selection model selected 4 variables for outcomes prediction: serum creatinine, sex, hypertension and treatment. Hypertensive patients had, on average, an increase in 0.588 in mRS (p = 0.022), while treatment with microsurgery had a decrease in 0.555 (p = 0.038). Conclusions: Patients with higher GFR had better outcomes after 6 months. Patients with higher GFR had better outcomes after 6 months. Creatinine presented an indirect role in GFR values and should be included in models for outcome prediction.

Anatomy of the Middle Meningeal Artery

Introduction The middle meningeal artery (MMA) is an important artery in neurosurgery. As the largest branch of the maxillary artery, it provides nutrition to the meninges and to the frontal and parietal regions. Diseases, including dural arteriovenous fistula (DAVF), pseudoaneurysm, true aneurysm, traumatic arteriovenous fistula (TAVF), Moya-Moya disease (MMD), recurrent chronic subdural hematoma (CSDH), migraine, and meningioma,may be related to the MMA. The aim of the present study is to describe the anatomy of the MMA and to correlate it with brain diseases. Methods A literature review was performed using the PubMed, Scielo, Scientific Direct, Ebsco, LILACS, TripDataBase and Cochrane databases, with the following descriptors: neurosurgery, neuroanatomy, meninges and blood supply. Discussion The MMA is embedded in a cranial groove, and traumatic or iatrogenic factors can result in MMA-associated pseudoaneurysms or arteriovenous fistulas (AVFs). In hemodynamic stress, true aneurysms can develop. Arteriovenous fistulas, pseudoaneurysms, and true aneurysms can be effectively treated by endovascular or surgical removal. In MMD, the MMA plays a role in the development and in the improvement of collateral circulation. Finally, in cases of CSDH, when standard surgery and drainage fail, MMA embolization can constitute a great alternative. Conclusion The MMA is a relevant structure for the understanding of neurosurgical diseases. In conclusion, every neurosurgeon must know the anatomy of the MMA sufficiently to correlate it with the diagnosed pathology, thus obtaining treatment effectiveness and preventing brain lesion.

Eficácia do topiramato como terapia adicional em pacientes com estado epiléptico refratário: uma breve revisão sistemática / Efficacy of topiramate as an add-on therapy in patients with refractory status epilepticus: a short systematic review

RESUMO Objetivo: Identificar evidências atuais sobre topiramato para o estado de mal epiléptico refratário. Métodos: Foi revisada a literatura para investigar a eficácia do topiramato no tratamento de estado de mal epiléptico refratário. Os termos de busca utilizados foram: "status epilepticus", "refractory", "treatment" e "topiramate". Não se empregaram restrições. Resultados: A busca identificou 487 artigos que descreviam o uso de topiramato para tratamento de estado de mal epiléptico refratário e seus resultados. Relatos de caso, revisões e experimentos em animais foram excluídos. Após exclusão de duplicatas e aplicação dos critérios de inclusão e exclusão, restaram nove estudos. Realizaram-se análises descritivas e qualitativas, com os seguintes resultados: as taxas de resposta, definidas como término de crises até 72 horas após administração de topiramato, variaram entre 27% e 100%. A mortalidade variou de 5,9% a 68%. Desfechos funcionais positivos, definidos como alta hospitalar, volta à funcionalidade basal ou reabilitação, foram documentados por sete estudos, e as taxas variaram entre 4% e 55%. A maioria dos estudos reportou apenas efeitos colaterais leves ou ausentes. Conclusão: Topiramato foi efetivo em abortar estado de mal epiléptico refratário, apresentando baixa mortalidade e boa tolerabilidade. Portanto, topiramato poderia ser uma boa opção como terceira linha para estado de mal epiléptico refratário, porém mais estudos são necessários.

ABSTRACT Objective: To identify current evidence on the use of topiramate for refractory status epilepticus. Methods: We reviewed the literature to investigate the efficacy of topiramate in the treatment of refractory status epilepticus. The search terms used were "status epilepticus", "refractory", "treatment" and "topiramate". No restrictions were used. Results: The search yielded 487 articles that reported using topiramate as a treatment for refractory status epilepticus and its outcomes. Case reports, review articles, and animal experiments were excluded. After excluding duplicates and applying inclusion and exclusion criteria, nine studies were included for analyses. Descriptive and qualitative analyses were performed, and the results were as follows: response rates (defined as termination in-hospital until 72 hours after the administration of topiramate) varied from 27% to 100%. The mortality rate varied from 5.9% to 68%. Positive functional long-term outcomes, defined as discharge, back to baseline or rehabilitation, were documented by seven studies, and the rates ranged between 4% and 55%. Most studies reported no or mild adverse effects. Conclusion: Topiramate was effective in terminating refractory status epilepticus, presented relatively low mortality and was well tolerated. Therefore, topiramate could be a good option as a third-line therapy for refractory status epilepticus, but further studies are necessary.

Pterygopalatine Fossa: Microsurgical Anatomy and its Relevance for Skull Base Surgery

Introduction The purpose of this study was to define the anatomical relationships of the pterygopalatine fossa (PPF) and its operative implications in skull base surgical approaches. Methods Ten cadaveric heads were dissected at the Dianne and M Gazi Yasargil Educational Center MicrosurgicaLaboratory, in Little Rock, AK, USA. The PPF was exposed through an extended dissection with mandible and pterygoid plate removal. Results The PPF has the shape of an inverted cone. Its boundaries are the pterygomaxillary fissure; themaxilla, anteriorly; themedial plate of the pterygoid process, and greater wing of the sphenoid process, posteriorly; the palatine bone,medially; and the body of the sphenoid process, superiorly. Its contents are the maxillary division of the trigeminal nerve and its branches; the pterygopalatine ganglion; the pterygopalatine portion of the maxillary artery (MA) and its branches; and the venous network. Differential diagnosis of PPF masses includes perineural tumoral extension along the maxillary nerve, schwannomas, neurofibromas, angiofibromas, hemangiomas, and ectopic salivary gland tissue. Transmaxillary and transpalatal approaches require extensive resection of bony structures and are narrow in the deeper part of the approach, impairing the surgical vision and maneuverability. Endoscopic surgery solves this problem, bringing the light source to the center of the surgical field, allowing proper visualization of the surgical field, extreme close-ups, and different view angles. Conclusion We provide detailed information on the fossa's boundaries, intercommunications with adjacent structures, anatomy of the maxillary artery, and its variations. It is discussed in the context of clinical affections and surgical approaches of this specific region, including pterygomaxillary disjunction and skull base tumors.

Microsurgical and Endoscopic Anatomy of the Cavernous Sinus

Objective To describe the endoscopic and microsurgical anatomy of the cavernous sinus (CS) with focus on the surgical landmarks in microsurgical anatomy. Materials and methods Ten formalin-fixed central skull base specimens (20 CSs) with silicone-injected carotid arteries were examined through an extended endoscopic transsphenoidal approach. Fifteen formalin-fixed heads were dissected to simulate the surgical position in CS approaches. Results Endoscopic access enables identification of the anterior and posterior surgical corridors. Structures within the CS and on its lateral wall could be visualized and studied, but none of the triangular areas relevant to the transcranial microsurgical anatomy were fully visible through the endoscopic approach. Conclusion The endoscopic approach to the CS is an important surgical technique for the treatment of pathological conditions that affect this region. Correlating endoscopic findings with the conventional (transcranial)microsurgical anatomy is a useful way of applying the established knowledge into a more recent operative technique. Endoscope can provide access to the CS and to the structures it harbors.

Anterior Communicating Artery Aneurysm Uncommon Hemorrhagic Presentation: Case Report

Intracranial aneurysm rupture causes subarachnoid hemorrhage in 80% of the cases, and it may be associated with intracerebral hemorrhage and/or intraventricular hemorrhage (IVH) in 34% and 17% of the patients, respectively. However, on rare occasions, aneurysm rupturemay be present causing isolate intracerebral hemorrhage or IVH without subarachnoid hemorrhage. We describe an unusual case of an anterior communicating aneurysm rupture presented with IVH, without subarachnoid hemorrhage. Although isolated IVH is rare, aneurysm rupture is a possible condition. Patients presenting with head computed tomography revealing IVH without subarachnoid hemorrhage should be promptly investigated with contrasted image exam to identify and treat possible causes, even in the absence of subarachnoid hemorrhage.

Paraspinal Lumbar Spine Approach - Wiltse Access

Introduction Technical developments in spinal surgery have reduced the number of surgical incisions and of the length of time for the procedure. Objective Describe topographical landmarks, anatomy and characteristics of the Wiltse access, a paraspinal approach to the lumbar spine. Methods A review of the literature was performed using as databases: PubMed, Embase, Science Direct, the Cochran Database and Google Scholar. Total 22 papers met the inclusion criteria, and they were all published between 1959 and 2016. Discussion The Wiltse approach is performed by median skin incision with lateral muscle dissection between the multifidus and the longissimus muscles, in a natural pathway. This approach allows access to the pedicles and to the lateral recess, enabling the performance of posterior spinal fusion and decompression and minimally invasive discectomy techniques. This access is less traumatic than the median approach, and it is ideal for lower levels, like L4­5 and L5-S1. Conclusion The authors strongly encourage this approach because they believe that, when well-indicated, the benefits outweigh the disadvantages and complications due to the fact that it is a less invasive procedure.

Introdução Os desenvolvimentos técnicos na cirurgia da coluna vertebral têm proporcionado a redução das incisões cirúrgicas e da duração do procedimento. Objetivo Descrever marcos topográficos, anatômicos e características do acesso de Wiltse, uma abordagem da coluna vertebral lombar. Métodos A revisão bibliográfica foi realizada utilizando como banco de dados: PubMed, Embase, Science Direct, banco de dados Cochran e Google Scholar. Foram encontrados 22 trabalhos que atenderam aos critérios de inclusão, todos publicados entre 1959 e 2016. Discussão A abordagem de Wiltse é realizada pela incisão cutânea mediana com dissecção muscular lateral entre o músculo multifidus e o músculo longissimus, na via natural. Esta abordagem permite o acesso aos pedículos e ao recesso lateral, e a realização de fusão posterior e descompressão de fratura da coluna vertebral e técnicas de discectomia minimamente invasivas. Este acesso é menos traumático do que a abordagem mediana, e é ideal para níveis mais baixos, como L4­5 e L5-S1. Conclusão Os autores recomendam esta abordagem, pois acreditam que os benefícios desta técnica, quando bem indicada, superam as desvantagens e complicações por ser esta menos invasiva.

Epidemiological profile and findings found intra operatively of glioblastoma at the neurosurgery service of Santa Casa of Ribeirão Preto Hospital - SP - Brazil / Perfil epidemiológico y hallazgos intraoperatorios de los glioblastomas en el servicio de neurocirurgia del Hospital Santa Casa de Ribeirão Preto - SP - Brasil

Introducción: El Glioblastoma (GB) o Astrocitoma grado IV (OMS), representan 15-20 por ciento de los tumores del SNC y aproximadamente 50 por ciento de los gliomas en adultos. Objetivo: Revelar el perfil epidemiológico del HSCMRP, correlacionar los hallazgos macroscópicos y microscópicos durante la cirugía de enero de 2011 a noviembre de 2015. Método: Estudio epimedeológico observacional, descriptivo, retrospectivo, 429 casos de tumores intracraneales a partir de los datos obtenidos de los archivos de La institución y los registros patológicos de los pacientes tratados quirúrgicamente. Resultados: Tumores encontrados 429 y 96 (22,37 por ciento) GB, edad media de 59 años, predominante séptima década 33 por ciento. Una relación entre mujeres y hombres fue de 1:1.12, respectivamente. Las quejas más frecuentes: dolor de cabeza (58 por ciento), confusión (41 por ciento), hemiparesia 37 por ciento. Comorbilidades frecuentes: hipertensión (64 por ciento), diabetes (22 por ciento) y fumadores (24 por ciento). La topografía más común fue la frente izquierdo. El tiempo medio de inicio de los síntomas a la cirugía fue de 39 días. Resección completa en 76 por ciento de los casos. La duración media de la recurrencia fue de 96 días, en 68% de los pacientes se observó una exuberancia de los vasos trombosados durante la cirugía Hallazgos patológicos: necrosis 98 por ciento, mitosis atípica 96 por ciento, proliferación microvascular 73 por ciento y polimorfismo nuclear 57 por ciento. Discusión: GB estado del arte. Conclusión: Nuestros resultados son similares con la literatura. Observación intraoperatoria de vasos trombosados y agresividad tumoral en pacientes con peor pronóstico y menor tiempo de recaída sugiere que es real, sin embargo. El pequeño número de casos, necesita más investigación, incluyendo otros hallazgos y resultados inmunohistoquímicos.

Introduction: Glioblastoma (GB) or Astrocytoma grade IV (WHO), represent 15-20 percent of CNS tumors and approximately 50 percent of gliomas in adults. Objective: Reveal the epidemiological profile of HSCMRP, correlate macroscopic and microscopic findings during surgery treated from January 2011 to November 2015. Method: Observational epidemiological study, descriptive, retrospective, of medical records of 429 cases of intracranial tumors from data obtained from the files of the institution and pathological records of patients treated surgically. Results: Total tumors found 429 and 96 (22.37 percent) GB with a mean age of 59 years, predominant seventh decade of life 33 percent. A relationship between women and men was with little difference 1:1.12, respectively. The most common complaints were headache (58 percent), confusion (41 percent), hemiparesis 37 percent. Most prevalent comorbidities: hypertension (64 percent) and diabetes (22 percent) and smokers (24 percent). Most common topography were followed by left front lesions. The average time of onset of symptoms to surgery was 39 days. Complete resection in 76 percent of cases. The mean length of postoperative recurrence was 96 days, in 68 percent patients were noticed an exuberance of thrombosed vessels during surgery. Pathological findings: necrosis 98%, atypical mitosis 96%, microvascular proliferation 73 percent and nuclear polymorphism 57 percent. Discussion: GB state of art. Conclusion: Our results are very slightly with the literature. The association of intraoperative observation thrombosed vessels, and tumor aggressiveness in patients with worse prognosis and shorter time to relapse, suggests that it is real, however, the small number of cases, needs further investigation, including other findings and immunohistochemical results.

Association between Wegener´s granulomatosis and severe lumbar pain

Introducción: La granulomatosis de Wegener (GW) es una enfermedad autoinmune sistémica caracterizada por vasculitis granulomatosa necrotizante que afecta principalmente a las vías respiratorias superiores, pulmones y riñones. Sin embargo, con menos frecuencia puede afectar a los músculos, las articulaciones, la piel, los ojos, el sistema cardiovascular y el sistema nervioso. La presencia de dolor lumbar consiste en una manifestación clínica inusual debido a la afectación del sistema nervioso. Objetivo: El objetivo de este estudio es alertar a los profesionales de la salud acerca de la posibilidad de cortar el dolor lumbar estar relacionado con la granulomatosis de Wegener, su impacto en la vida diaria del paciente, así como los signos clínicos y las formas de diagnóstico. Materiales y Métodos: Revisión de la literatura utilizando PubMed, MEDLINE, Google Scholar, SciELO, EBSCO. Los trabajos seleccionados entre 1995 y 2013 por un total de 48 obras de las cuales se seleccionaron 21 de acuerdo con sus informes de afectación neurológica, diagnóstico y tratamiento. Discusión: Los síntomas neurológicos pueden ocurrir en 22-50 por ciento de los pacientes durante el curso de la GW. sistema nervioso (SNC) central es poco frecuente (sólo 2-8 por ciento de los pacientes) dolor lumbar .Severe es una manifestación clínica poco frecuente y puede estar asociada con la participación de sistema nervioso central y periférico. CNS debido a la compresión de la médula espinal a nivel lumbar. sistema nervioso periférico debido a la compresión de las raíces nerviosas. Conclusión: La granulomatosis de Wegener es ser una enfermedad sistémica puede presentar diferentes manifestaciones clínicas De acuerdo con el sitio involucrado. Es asociaciones con el dolor lumbar es rara y la refleja la afectación neurológica. Por lo tanto, en pacientes con dolor lumbar grave sin diagnóstico confirmado, granulomatosis de Wegener no debería ser considerado.

Introduction: Wegener’s granulomatosis (WG) is a systemic autoimmune disease characterized by necrotizing granulomatousvasculitis which primarily affects upper respiratory tract, lungs and kidneys. However, less frequently can affect muscles,joints, skin, eyes, cardiovascular system and nervous system. The presence of lumbar pain consists in an unusual clinicalmanifestation due to the involvement of the nervous system. Objective: The objective of this study is to alert health professionalsabout the possibility that severe lumbar pain be related to Wegener’s granulomatosis, it’s impact on the patient’s dailylife as well as clinical signs and diagnosis forms. Materials and Methods: Literature review using PubMed, MEDLINE, GoogleScholar, SciELO, EBSCO. Selected works from 1995 to 2013 totaling 48 works of which 21 were selected according to theirreports of neurological involvement, diagnosis and treatment. Discussion: Neurological symptoms may occur in 22-50 percent of patients during the course of WG. Central nervous system (CNS) involvement is uncommon (only 2-8 percent of patients).Severelumbar pain is a rare clinic manifestation and it can be associated with the involvement of central and peripheral nervous system.CNS due to compression of the spinal cord at the lumbar level. Peripheral nervous system due to compression of nerveroots. Conclusion: Wegener’s granulomatosis for being a systemic disease can present different clinical manifestations accordingto the involved site. It’s associations with lumbar pain is rare and reflects it’s neurological involvement. Therefore, inpatients with severe lumbar pain without confirmed diagnosis, Wegener’s granulomatosis should be considered.

Chronic Subdural Hematoma Spontaneous Resolution

Introduction Chronic subdural hematoma (CSH) is a hemorrhagic brain injury that persists for more than 21 days after its initial formation. The incidence is predominantly among the elderly population (> 65 years), and varies from 58 to 74/100,000 inhabitants. Spontaneous resolution is considered variable; in the literature series, it is < 1­20% of cases. Objectives To expose the CSH pathophysiological mechanisms of spontaneous resolution and some treatments that lead to hematoma volume reduction. Methods Literature review between 1971 to 2016, using the PubMed, Medline, Embase, Scielo, LILACS and Cochrane databases using key-words, with inclusion and exclusion criteria. Discussion Spontaneous resolution of the CSH pathophysiology is controversial; however, it can be attributed to four basic mechanisms: 1) outer capsule membrane maturation; 2) decreased fibrinolysis; 3) bidirectional flow of blood vessels; and 4) platelet plug. Some drugs, such as mannitol, corticosteroids, tranexamic acid and atorvastatin, contribute to CSH resolution, since they change the capsule membrane permeability, and inhibit the fibrinolytic and inflammatory systems. Conclusion Spontaneous resolution is unpredictable; in some cases, it has a large temporal evolution (of up to 6 years). It occurs in small or laminar collections, asymptomatic or with transient neurological symptoms, and the pathophysiology is still controversial to this day. Therefore, surgical treatment should remain the first option, even though the conservative management is adopted for some patients. Rigorous outpatient and radiological follow-up are recommended.

Introdução O hematoma subdural crônico (HSDC) é uma lesão cerebral hemorrágica que persiste por mais de 21 dias após o começo de sua formação. A sua incidência é predominantemente na população idosa (> 65 anos), e varia de 58­74 /100.000 habitantes, e sua resolução espontânea é considerada rara e variável nas séries da literatura em < 1­20% dos casos. Objetivos Expor os mecanismos fisiopatológicos que favorecem a resolução espontânea do HSDC e alguns tratamentos que favorecem a redução do volume do hematoma. Métodos Revisão bibliográfica entre 1971 e 2016, utilizando as bases de dados PubMed, Medline, Embase, Scielo, LILACS e Cochrane, por meio de palavras-chave, com critérios de inclusão e exclusão. Discussão A fisiopatologia da resolução espontânea dos HSDCs é controversa, porém pode ser atribuída a quatro mecanismos: 1) maturação da membrana externa da cápsula; 2) diminuição da fibrinólise; 3) fluxo bidireccional de vasos sanguíneos; e 4) tampão plaquetário. Alguns medicamentos, tais como manitol, corticoesteroides, ácido tranexâmico e atorvastatina, também podem favorecer a resolução dos HSDCs, uma vez que alteram a permeabilidade da membrana da cápsula e inibem os sistemas fibrinolítico e inflamatório. Conclusão A resolução espontânea é imprevisível; em alguns casos, tem ampla evolução temporal em até 6 anos. Ocorre em coleções pequenas ou laminares, assintomáticas ou com sintomas neurológicos transitórios, e sua fisiopatologia ainda hoje é controversa. Portanto, o tratamento cirúrgico deve continuar sendo a primeira opção, embora se adote uma conduta conservadora para alguns pacientes. O seguimento ambulatorial e radiológico rigoroso é recomendado.

Traumatic brain lesions in newborns / Lesões cerebrais traumaticas em recém nascidos

ABSTRACT The neonatal period is a highly vulnerable time for an infant. The high neonatal morbidity and mortality rates attest to the fragility of life during this period. The incidence of birth trauma is 0.8%, varying from 0.2-2 per 1,000 births. The aim of this study is to describe brain traumas, and their mechanism, anatomy considerations, and physiopathology of the newborn traumatic brain injury. Methods A literature review using the PubMed data base, MEDLINE, EMBASE, Science Direct, The Cochrane Database, Google Scholar, and clinical trials. Selected papers from 1922 to 2016 were studied. We selected 109 papers, through key-words, with inclusion and exclusion criteria. Discussion This paper discusses the risk factors for birth trauma, the anatomy of the occipito-anterior and vertex presentation, and traumatic brain lesions. Conclusion Birth-related traumatic brain injury may cause serious complications in newborn infants. Its successful management includes special training, teamwork, and an individual approach.

RESUMO O período neonatal é um período vulnerável para o recém nascido. As altas taxas de morbidade e mortalidade neonatal atestam a fragilidade da vida durante esta fase. Trauma durante o nascimento é de 0,8%, variando de 0,2 a 2 por 1000 nascimentos. O objetivo deste estudo é descrever o tocotraumatismo, seu mecanismo, considerações anatômicas e fisiopatologia da lesão em recém nascido. Métodos Revisão da literatura utilizando base de dados PubMed, MEDLINE, EMBASE, Science Direct, The Cochrane Detabase, Google Scolar, ensaios clínicos. Os trabalhos selecionados foram de 1922 a 2016. Foram selecionados 109 trabalhos, através de palavras-chave, inclusão e critérios de exclusão. Discussão Este artigo discute os fatores de risco para o trauma do nascimento, a anatomia da apresentação do vértex occipto-anterior e as lesões traumáticas cerebrais. Conclusão Lesão cerebral traumática no nascimento pode causar complicações graves nos recém-nascidos. O tratamento desta condição deve ser especializado, envolvendo trabalho, equipe e abordagem individualizado

Quadrigeminal cisterna lipoma: report of two cases and literature review / Lipoma da cisterna quadrigeminal: relato de dois casos e revisão da literatura

Intracranial lipomas are congenital, benign and slow-growing tumors. The incidence were 0.1 to 0.5 percent of all primary brain tumors and are often diagnosed in incidental findings of neuroradiological investigation. Lipoma in quadrigeminal region occurs in 25 percent of intracranial lipomas and has been reported as lipomas in quadrigeminal cistern (perimesencephalic cistern), quadrigeminal plate, ambiens cistern or superior medullary velum. MRI is the most major exam. The treatment is conservative in most cases, surgical removal is hampered by their deep location and contiguous with adjacent neurovascular structures. The authors report two cases of lipoma in the quadrigeminal region, incidental findings and discuss the clinical findings, neuroimaging and treatment.

Lipomas intracranianos são tumores congênito, benigno e de crescimento lento. Sua incidência é de 0.1 a 0.5 por cento de todos os tumores cerebrais primários e são frequentemente diagnosticados em achados incidental de investigação neuroradiológica. Lipoma na região quadrigeminal ocorre em 25 por cento dos lipomas intracranianos e tem sido relatados como lipomas na cisterna quadrigeminal (cisterna perimesencefálica), placa quadrigeminal, cisterna ambiens ou véu medular superior. O exame de eleição é ressonância magnética. O tratamento é conservador na maioria dos casos, a remoção cirúrgica é dificultada pela sua localização profunda e da contiguidade com estruturas neurovasculares adjacentes. Os autores relatam dois casos de lipoma na região quadrigeminal achados incidentalmente e discutem os achados clínicos, imagem e tratamento.