Melanoma Originating from the Dura-Mater: A Case Report and Review of the Literature.

Melanomas originating from the dura-mater are extremely rare tumors. The diagnosis is complex, and usually only made after excluding other entities. The prognosis is poor, with average free-disease survival of 20 months, after treatment with complete surgical excision and adjuvant therapy. We report the case of a 41-year-old asymptomatic patient, presenting with a subcutaneous mass in the left parieto-occipital region, later diagnosed as a primary dura mater melanoma. Treatment included complete microsurgical excision, radiotherapy and adjuvant immunotherapy. Therefore, due to the rare nature of the disease and its high lethality, correct diagnosis and treatment are medical challenges.

Immune-Mediated Hypertrophic Pachymeningitis and its Mimickers: Magnetic Resonance Imaging Findings.

Hypertrophic pachymeningitis (HP) is a rare and chronic inflammatory disorder presenting as localized or diffuse thickening of the dura mater. It can be idiopathic or an unusual manifestation of immune-mediated, infectious, and neoplastic conditions. Although some cases may remain asymptomatic, HP can lead to progressive headaches, cranial nerve palsies, hydrocephalus, and other neurological complications, which makes its recognition a fundamental step for prompt treatment. Regarding the diagnosis workup, enhanced MRI is the most useful imaging method to evaluate dural thickening. This article addresses the MR imaging patterns of immune-mediated HP, including immunoglobulin G4-related disease, neurosarcoidosis, granulomatosis with polyangiitis, rheumatoid pachymeningitis, and idiopathic HP. The main infectious and neoplastic mimicking entities are also discussed with reference to conventional and advanced MR sequences.

Processing, Characterization and Disintegration Properties of Biopolymers Based on Mater-Bi® and Ellagic Acid/Chitosan Coating.

Among the most promising synthetic biopolymers to replace conventional plastics in numerous applications is MaterBi® (MB), a commercial biodegradable polymer based on modified starch and synthetic polymers. Actually, MB has important commercial applications as it shows interesting mechanical properties, thermal stability, processability and biodegradability. On the other hand, research has also focused on the incorporation of natural, efficient and low-cost active compounds into various materials with the aim of incorporating antimicrobial and/or antioxidant capacities into matrix polymers to extend the shelf life of foods. Among these is ellagic acid (EA), a polyphenolic compound abundant in some fruits, nuts and seeds, but also in agroforestry and industrial residues, which seems to be a promising biomolecule with interesting biological activities, including antioxidant activity, antibacterial activity and UV-barrier properties. The objective of this research is to develop a film based on commercial biopolymer Mater-Bi® (MB) EF51L, incorporating active coating from chitosan with a natural active compound (EA) at two concentrations (2.5 and 5 wt.%). The formulations obtained complete characterization and were carried out in order to evaluate whether the incorporation of the coating significantly affects thermal, mechanical, structural, water-vapor barrier and disintegration properties. From the results, FTIR analysis yielded identification, through characteristic peaks, that the type of MB used is constituted by three polymers, namely PLA, TPS and PBAT. With respect to the mechanical properties, the values of tensile modulus and tensile strength of the MB-CHI film were between 15 and 23% lower than the values obtained for the MB film. The addition of 2.5 wt.% EA to the CHI layer did not generate changes in the mechanical properties of the system, whereas a 5 wt.% increase in ellagic acid improved the mechanical properties of the CHI film through the addition of natural phenolic compounds at high concentrations. Finally, the disintegration process was mainly affected by the PBAT biopolymer, causing the material to not disintegrate within the times indicated by ISO 20200.

Enfermedad de Rosai-Dorfman intracraneal: un infrecuente diagnóstico diferencial del meningioma. Reporte de un caso ilustrativo

La Enfermedad de Rosai-Dorfman es un trastorno infrecuente y de etiología desconocida. La presentación intracraneal es aún más rara y suele imitar la apariencia de un meningioma en las imágenes del encéfalo. Se presenta el caso de un paciente varón de 38 años que ingresa por una tumoración intracraneal, extra-axial y supratentorial asociada a déficit neurológico leve; con diagnóstico presuntivo de meningioma de la convexidad. Después de la intervención quirúrgica, el diagnóstico histológico definitivo fue de Enfermedad de Rosai-Dorfman intracraneal. Se debe considerar la Enfermedad de Rosai-Dorfman intracraneal dentro del diagnóstico diferencial de una lesión intracraneal extra-axial sugestiva de un meningioma debido a la similitud en las neuroimágenes y la presentación clínica entre ambas patologías.

Rosai-Dorfman disease is an infrequent condition with no known etiology. The intracranial presentation is even rarer, and it resembles the appearance of a meningioma in image studies. We present the case of a 38-year-old male patient who was admitted because of an extra-axial supratentorial cranial tumor, associated to mild neurological deficit. The presumptive diagnosis was convexity meningioma. After surgery, the definitive histologic diagnosis was intracranial Rosai-Dorfman disease. This condition should be considered in the differential diagnosis of an extra-axial intracranial lesion suggesting meningioma, because of similar neuroimaging results and the similar clinical picture.

Presence of mast cells in the rat pericranium ­ a tissue very sensitive to pain / Presença de mastócitos no pericrânio do rato ­ tecido muito sensível à dor

Objective: To evaluate mast cell presence in the pericranium of Wistar rats. Methods: Five male rats of the Wistar strain were used. The animals were housed under a 12 h light cycle with ad libitum access to food and water and allowed 10 days of acclimatization before tissue sampling. The five rats were anesthetized by intraperitoneal injection of ketamine/xylazine, 10/20 mg/kg. Following aseptic preparation of the head skin, a midline longitudinal incision was made to expose the pericranium. Two samples of the pericranium were taken, one from the right and one from the left. These samples were fixed in 10% buffered formaldehyde for 24 h. After fixation, tissue samples were paraffin-embedded and sectioned at 4 µm. Then, slides were deparaffinized, stained with a concentration of 0.1% toluidine blue for 1 min, and washed with distilled water. Last, slides were photomicrographed under 400x magnification to identify mast cells. Results: Mast cells were identified in the dura mater and the five rats' pericranium. In the dura mater, mast cells were also found in these rats. We found both granulated (intact) and degranulated mast cells. Conclusion: We suggest that future preclinical studies investigating the involvement of dural mast cells and other meningeal cell populations should also include pericranium samples to explore this structure's relevance in migraine pain and other headache disorders.

Objetivo: Avaliar a presença de mastócitos no pericrânio de ratos Wistar. Métodos: Foram utilizados cinco ratos machos da linhagem Wistar. Os animais foram alojados sob um ciclo de luz de 12 horas com acesso ad libitum a comida e água e tiveram 10 dias de aclimatação antes da amostragem de tecido. Os cinco ratos foram anestesiados por injeção intraperitoneal de cetamina/xilazina, 10/20 mg/kg. Após preparação asséptica da pele da cabeça, foi feita uma incisão longitudinal na linha média para expor o pericrânio. Foram retiradas duas amostras do pericrânio, uma da direita e outra da esquerda. Essas amostras foram fixadas em formaldeído tamponado a 10% por 24 horas. Após a fixação, as amostras de tecido foram embebidas em parafina e seccionadas a 4 µm. Em seguida, as lâminas foram desparafinizadas, coradas com concentração de azul de toluidina 0,1% por 1 min e lavadas com água destilada. Por fim, as lâminas foram fotomicrografadas com aumento de 400x para identificação de mastócitos. Resultados: Foram identificados mastócitos na dura-máter e no pericrânio dos cinco ratos. Na dura-máter, mastócitos também foram encontrados nesses ratos. Encontramos mastócitos granulados (intactos) e desgranulados. Conclusão: Sugerimos que futuros estudos pré-clínicos que investiguem o envolvimento de mastócitos durais e outras populações de células meníngeas também incluam amostras de pericrânio para explorar a relevância desta estrutura na dor da enxaqueca e em outros distúrbios de cefaleia.

Utilidad del protocolo de manejo de la paciente obstétrica grave guiado por ultrasonido (POGGU) en pacientes código mater / Usefulness of the protocol for the management of severe obstetric patients guided by ultrasound (POGGU) in patients codigo mater / Utilidade do protocolo de manejo da paciente obstétrica grave guiado por ultrassom (POGGU) em pacientes de código mater

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Abstract: Introduction: maternal mortality can still be considered an important public health problem in our country, within the strategies implemented to reduce morbidity-mortality, the code mater is created for our intensive therapy, based on care algorithms, where a cornerstone is the early and timely diagnosis, gaining relevance the use of ultrasound as a diagnostic m ethod in severe obstetric patients. In our unit, an ultrasound protocol was developed aimed at the assessment of severe obstetric patients, called protocol in severe obstetric patient guided by ultrasound or POGGU protocol. Objective: to determine if the Poggu protocol is useful for diagnostic integration and management of these patients. Material and methods: retrospective, analytical cross-sectional study, 507 patients were included in a period of 7 years, where once the mater code was activated, they went to the evaluation in search of symptoms and cardinal signs, depending on these, proceeded to carry out point of care ultrasonography, determining classes of intervention, bivariate analysis was performed, Student's t or Mann-Whitney U tests were used for continuous and discrete quantitative variables and Pearson's χ2 test for categorical and nominal ones. Variables were correlated between the types of categories and point of care ultrasounds and finally a multivariate analysis of binary logistic regression adjusted for variables with statistical and clinical significance. Results: it was obtained that grades II, III, and IV showed an association, reaching significance against point of care ultrasonography, based on the diagnosis (grade II) in 65/35 in abdominal, with a p = 0.000; pulmonary of 81/19, with a p = 0.015; heart rate of 82/18, with a p = 0.022; large vessels and response to volume of 57/43, with a p = 0.000. A usefulness was found in providing additional information (grade III) with p = 0.000, and in which ultrasonography was decisive for management (grade IV) with p = 0.000, finally, in the logistic regression a result was obtained squared or adjusted R of 0.50, that is, 50%, with an omnibus of p = 0.0001, finding that there is a moderate relationship between degrees and cardiac point of care ultrasonography and great vessels with response to volume. Conclusions: 99.6% of our studied population survived being operated on with the POGGU protocol within the multidisciplinary rapid response care process code mater. In 97.2% of the patients, at least one ultrasound window was obtained for patient assessment, an important fact, since it tells us about the ease of its realization, its implementation is suggested when activating the mater code, not only as an option, if not essential (making it an integral part of the obstetric triage technical guideline, maternal code and obstetric immediate response team), the use of ultrasound should be considered as an essential part of the intensivist's work when assessing an obstetric patient serious.

Resumo: Introdução: a mortalidade materna ainda pode ser considerada um importante problema de saúde pública em nosso país, dentro das estratégias implementadas para reduzir a morbidade-mortalidade, é criado o código máter pela nossa unidade de terapia intensiva, com base em algoritmos de atendimento, onde uma pedra angular é o precoce e oportuno diagnóstico, ganhando relevância o uso do ultrassom como método diagnóstico em pacientes obstétricas graves Na nossa unidade foi desenvolvido um protocolo de ultrassom para avaliação de pacientes obstétricas graves, denominado protocolo de pacientes obstétricas graves guiado por ultrassom ou protocolo POGGU. Objetivo: determinar se o protocolo para pacientes obstétricas graves guiadas por ultrassom ou o protocolo POGGU é útil para integração diagnóstica e manejo dessas pacientes. Material e métodos: estudo retrospectivo, transversal, descritivo e analítico. Incluíram-se 507 pacientes obstétricas que receberam atendimento médico nas quais o código máter foi ativado no período de 2015 a 2022. Uma vez recolhidos os dados das planilhas de coleta, eles foram registrados no banco de dados do Excel, posteriormente, os resultados foram processados no pacote estatístico Statistical Package for the Social Sciences (SPSS), para Windows versão 26.0, utilizaram-se medidas de frequência relativa (frequências absolutas e percentuais) e de tendência central e dispersão (média e desvio padrão) conforme o caso, realizaram-se análise bivariada, para variáveis quantitativas contínuas e discretas foram utilizados os testes t de Student ou U de Mann-Whitney. Para variáveis categóricas e nominais, foi utilizado o teste χ2 de Pearson. Finalmente, realizou-se uma análise multivariado de regressão logística, a significância estatística foi estabelecida como p < 0.05 ou < 5%. Resultados: obteve-se que os graus II, III e IV apresentaram associação, alcançando significância em relação à ultrassonografia point-of-care, corroborando o diagnóstico (grau II) em 65/35 em abdominal, com p = 0.000; pulmonar de 81/19, com p = 0.015; cardíaco de 82/18, com um p = 0.022; grandes vasos e resposta a volume de 57/43, com p = 0.000. Encontrou-se uma utilidade em fornecer informações adicionais (grau III) com p = 0.000, e em que o ultrassom foi decisivo para o manejo (grau IV) com p = 0.000, finalmente, na regressão logística obteve-se como resultado um R quadrado ou ajustado de 0.50, ou seja, 50%, com um omnibus de p = 0.0001, constatando que existe uma relação moderada entre graus e o ultrassom point-of-care cardíaco e grandes vasos com resposta ao volume. Conclusões: 99.6% da nossa população de estudo sobreviveram sendo intervencionados com o protocolo POGGU dentro do processo multidisciplinar do código máter de cuidados de resposta rápida. Em 97.2% dos pacientes foi obtida pelo menos uma janela de ultrassom para avaliação do paciente, dado importante, pois nos fala da facilidade de sua realização, sua implementação é sugerida no momento de acionar o código máter, e não apenas como uma opção, senão essencial (tornando-se parte integrante das diretrizes técnicas de triagem obstétrica, código máter e equipe de resposta imediata obstétrica), o uso do ultrassom deve ser considerado como parte essencial do trabalho do médico intensivista na avaliação de um obstetra paciente grave.

Storage and purification adaptations for the isolation of total RNA from the dura mater / Adaptações no armazenamento e purificação para o isolamento de RNA total da dura-máter

Abstract Background RNA extraction is a step that precedes several molecular techniques. The fibrous tissue, more specifically the dura mater, has several limitations in routine protocols, and lacks optimization protocols to overcome these problems. Objective To test stock reagents and purification kits, optimizing commercial kit protocols for RNA extraction from the dura mater. Methods Dura mater samples were obtained from eight Wistar rats and maintained in two different stabilizers. The samples were purified using four different protocols, and the RNA was evaluated for the yield and purity in NanoDrop 2000 (Thermo Scientific, Wilmington, DE, United States). Beta-actin gene was used for analyzing gene expression, since is one of the most used reference genes. Results The RNA preservation was similar in both stabilizers. The addition of an incubation step prior the purification protocols allowed better tissue digestion and RNA recovery. The RNA purified using the protocols membrane-based showed higher quality than liquid-liquid purification. This impact was observed in the 3-week evaluation using RT-qPCR. Conclusion Stabilizers are efficient for RNA preservation and membrane-based purification protocols are more suitable for RNA recovery from dura mater tissue, allowing the evaluation of gene expression in this type of tissue. Adaptations in the dura mater RNA extraction protocol differ from the pre-established protocols because it takes into account the peculiarity of fibrous tissue and low cellularity. In addition to providing a low-cost mechanism, based on techniques that are part of the laboratory routine, it is possible to improve the quality of the extracted material, ensuring greater efficiency in the use of subsequent techniques.

Resumo Antecedentes A extração de RNA é uma etapa que antecede várias técnicas moleculares. O tecido fibroso, mais especificamente a dura-máter, apresenta várias limitações nos protocolos de rotina e carece de protocolos de otimização para superar estes problemas. Objetivo Testar reagentes de estoque e kits de purificação, otimizando protocolos de kits comerciais para extração de RNA da dura-máter. Métodos Amostras de dura-máter foram obtidas de oito ratos Wistar e mantidas em dois estabilizadores diferentes. As amostras foram purificadas em quatro protocolos diferentes e o RNA foi avaliado quanto ao rendimento e pureza no NanoDrop 2000 (Thermo Scientific, Wilmington, DE, United States). O gene da beta-actina foi utilizado para analisar a expressão gênica, uma vez que é um dos genes de referência mais utilizados. Resultados A preservação do RNA foi semelhante em ambos os estabilizadores. A adição de uma etapa de incubação antes dos protocolos de purificação permitiu uma melhor digestão do tecido e recuperação de RNA. O RNA purificado pelos protocolos baseados em membrana apresentou qualidade superior ao da purificação líquido-líquido. Este impacto foi observado na avaliação de três semanas usando RT-qPCR. Conclusão Os estabilizadores são eficientes para preservação do RNA e os protocolos de purificação baseados em membrana são mais adequados para recuperação de RNA do tecido da dura-máter, permitindo a avaliação da expressão gênica neste tipo de tecido. As adaptações no protocolo de extração de RNA da dura-máter diferem dos protocolos preestabelecidos porque leva em consideração a peculiaridade do tecido fibroso e com baixa celularidade. Além de fornecer um mecanismo de baixo custo, baseado em técnicas que fazem parte da rotina laboratorial, é possível melhorar a qualidade do material extraído, garantindo maior eficácia no uso de técnicas subsequentes.

Deambulación precoz e incidencia de cefalea pospunción dural en paciente obstétrica propuesta para cesárea electiva / Early ambulation and incidence of postdural puncture headache in an obstetric patient proposed for elective cesarean section

Introducción: La cefalea pospunción dural es la complicación más habitual tras la anestesia neuroaxial, y es especialmente frecuente en obstetricia, un hallazgo común en el período posparto. Suele ser una complicación benigna y autolimitada, pero sin tratamiento puede conducir a otras complicaciones más graves. Objetivo: Describir la incidencia de cefalea pospunción dural en las pacientes obstétricas programadas para cesárea electiva con anestesia espinal y su relación con la deambulación precoz. Métodos: Se realizó un estudio observacional descriptivo en una serie de casos (50), todas las pacientes propuestas para cesárea electiva bajo el método anestésico espinal subaracnoideo con trocar calibre 25 en el período comprendido entre mayo a diciembre del 2018. Resultados: De un total de 50 pacientes estudiadas con edades entre 18 y 35 años de edad, al 96 por ciento se le realizó punción única de la duramadre, en todas se utilizó trócar 25, atraumático y ninguna presentó cefalea pospunción dural. Conclusiones: Se concluye que la incidencia de cefalea pospunción dural puede disminuir cuando se utilizan agujas espinales atraumáticas, de pequeño calibre; lo cual facilita también la deambulación temprana de la paciente(AU)

Introduction: Postdural puncture headache is the most common complication following neuraxial anesthesia, and is especially common in obstetrics, a common finding in the postpartum period. It is usually a benign and self-limited complication, but if not treated, it can lead to further serious complications. Objective: To describe the incidence of postdural puncture headache in obstetric patients scheduled for elective cesarean section with spinal anesthesia and its relationship with early ambulation. Methods: A descriptive observational study was carried out in a case series (50) of patients proposed for elective cesarean section under the subarachnoid spinal anesthesia method with 25-gauge trocar in the period from May to December 2018. Results: Out of a total of 50 patients aged 18-35 years who participated in the study, 96 percent underwent single dura mater puncture. In all cases, a 25-gauge trocar was used and none presented postdural puncture headache. Conclusions: The incidence of postdural puncture headache may be concluded to decrease when atraumatic spinal needles of small caliber are used, which also facilitates early ambulation of the patient(AU)

Histomorphometry of mast cells in the convexity of human intracranial dura mater.

Mast cells, known as pro-inflammatory effector cells, are immunocytes present in the meninges and may be involved in the pathophysiology of migraine. This study aims to evaluate the histomorphometric parameters of mast cells located in the convexity of the human intracranial dura mater. For this, samples of intracranial dura mater from eight human fresh cadavers were collected between 8- and 24-h post-mortem. The whole samples were fixed and, subsequently, two fragments of 1.5 cm² each were cut from four different areas of the dura mater convexity, containing a segment of the middle meningeal artery, totaling 64 fragments. After histological processing, the fragments were submitted to microtomy (5 and 10 µm), stained with toluidine blue (0.1%), or immunohistochemically labeled for tryptase, and analyzed using optical microscopy. The following histomorphometric parameters were evaluated: distance from mast cells to vessels, the density of mast cells, and percentage of mast cells with degranulation. Histomorphometric analyzes showed a higher density of mast cells in the vicinity of blood vessels (arterial and venous), with distances around 0-150 µm. A greater number of mast cells was detected near venous vessels in the periosteal layer (17.0 ± 10.1 cells/mm²) than in the meningeal layer (14.1 ± 7.0 cells/mm²) (p < 0.05). Mast cells from the region close to the superior sagittal sinus were found in greater quantity close to the venous vessels (16.7 ± 10.1 cells/mm²) than to the arterial vessels (11.2 ± 7.5 cells/mm²) (p < 0.05). In short, in the convexity of the human intracranial dura mater, mast cells are located close to blood vessels, with a greater number of cells next to the venous vessels of the periosteal layer and in the proximal region of the superior sagittal sinus.

Small-angle X-ray scattering to quantify the incorporation and analyze the disposition of magnetic nanoparticles inside cells.

Access to detailed information on cells loaded with nanoparticles with nanoscale precision is of a long-standing interest in many areas of nanomedicine. In this context, designing a single experiment able to provide statistical mean data from a large number of living unsectioned cells concerning information on the nanoparticle size and aggregation inside cell endosomes and accurate nanoparticle cell up-take is of paramount importance. Small-angle X-ray scattering (SAXS) is presented here as a tool to achieve such relevant data. Experiments were carried out in cultures of B16F0 murine melanoma and A549 human lung adenocarcinoma cell lines loaded with various iron oxide nanostructures displaying distinctive structural characteristics. Five systems of water-dispersible magnetic nanoparticles (MNP) of different size, polydispersity and morphology were analyzed, namely, nearly monodisperse MNP with 11 and 13 nm mean size coated with meso-2,3-dimercaptosuccinic acid, more polydisperse 6 nm colloids coated with citric acid and two nanoflowers (NF) systems of 24 and 27 nm in size resulting from the aggregation of 8 nm MNP. Up-take was determined for each system using B16F0 cells. Here we show that SAXS pattern provides high resolution information on nanoparticles disposition inside endosomes of the cytoplasm through the structure factor analysis, on nanoparticles size and dispersity after their incorporation by the cell and on up-take quantification from the extrapolation of the intensity in absolute scale to null scattering vector. We also report on the cell culture preparation to reach sensitivity for the observation of MNP inside cell endosomes using high brightness SAXS synchrotron source. Our results show that SAXS can become a valuable tool for analyzing MNP in cells and tissues.

Emociones y cuidados en el confinamiento hogareño durante la pandemia de covid-19 / Emoções e cuidados em confinamento domiciliar durante a pandemia do covid-19 / Care and emotions in home confinement during the covid-19 pandemic

RESUMEN El artículo problematiza, a través de relatos de prácticas cotidianas de cuidado, emociones que se organizan en torno a las diferentes configuraciones del cuidado infantil en el Área Metropolitana de Buenos Aires (Argentina). De esta forma, se trata de alimentar la mirada de las infancias, maternidades y paternidades urbanas en 'plural', con la meta de poder considerar el amplio repertorio de formas de disponerse, de estar y sentir que atraviesan el arco de experiencias de los arreglos familiares y el cuidado de hijos e hijas. ¿Cómo se reorganizaron los cuidados domésticos durante la pandemia? ¿Qué emociones y 'reglas del sentir' esto puso en evidencia? ¿Cómo impactaron los cambios en las fronteras del 'adentro' y el 'afuera' en las familias y en las subjetividades laborales y personales? Un primer nivel de análisis de la información empírica está estructurada por las formas de habitar (quiénes vivían con quiénes en términos de parentesco, con qué tipos de vivienda, haciendo qué uso del barrio), para presentar sobre ellas las tensiones emocionales, necesidades y estrategias que emergieron en los relatos.

RESUMO O artigo problematiza, por meio de relatos de práticas cotidianas do cuidado, as emoções que organizam-se em torno das diferentes configurações do cuidado das crianças na Área Metropolitana de Buenos Aires, (Argentina). Dessa forma, o artigo pretende contribuir a um olhar das infâncias, das maternidades e das paternidades no plural, com o objetivo de poder contemplar o amplo repertório de modos de experienciar, ser e sentir que perpassam o arco de experiências das dinâmicas familiares e do cuidado das crianças. Como os cuidados domésticos foram reorganizados durante a pandemia? Que emoções e regras do sentir isso trouxe à tona? Como as mudanças nas fronteiras do 'dentro' e 'fora' impactaram as famílias e as subjetividades pessoais e do trabalho? Um primeiro nível de análise da informação empírica é estruturado pelos modos de viver (quem conviveu com quem em termos do parentesco, em que tipo de habitação, qual uso da vizinhança), para apresentar tensões emocionais, necessidades e estratégias que surgiram nos relatos.

ABSTRACT. This article addresses the emotions around different configurations of childcare in the Metropolitan area of Buenos Aires, Argentina, based on narratives about everyday care practices. In doing so, the article aims to contribute to a pluralistic view of childhood and parenthood in order to consider the vast repertoire of dispositions, of being and feeling that are intertwined in family arrangements and childcare. How did the interviewees rearrange domestic care during the pandemic? What emotions and 'emotional norms' does that new situation reveal? How did the changes in the limits of inside and outside affect families and personal and labor subjectivities? A first level empirical data analysis is performed on the modes of inhabiting a home -who lived with whom, in which type of house, and what use they make of the resources in their neighborhood — in order to reflect upon the emotional tensions, needs and strategies that emerged from the narratives.

Quantitative evaluation of the regenerated dura mater in a decompressive skull trepanation model in rats / Evaluación cuantitativa de la duramadre regenerada en un modelo de perforación cranial descompresiva en ratas

SUMMARY: Regeneration of the dura mater following duraplasty using a collagen film, a chitosan film, or a combination of both with gelatin, was studied in a craniotomy and penetrating brain injury model in rats. Collagen autofluorescence in the regenerated dura mater was evaluated using confocal microscopy with excitation at λem = 488 nm and λem = 543 nm. An increase in regeneration of the extracellular matrix of connective tissue and an increase in matrix fluorescence were detected at 6 weeks after duraplasty. The major contributors to dura mater regeneration were collagen films, chitosan plus gelatin-based films, and, to a much lesser extent, chitosan-based films. By using autofluorescence densitometry of extracellular matrix, the authors were able to quantify the degree of connective tissue regeneration in the dura mater following duraplasty.

RESUMEN: Se estudió la regeneración de la duramadre después de una duraplastía utilizando una lámina de colágeno, una lamina de quitosano o una combinación de ambas con gelatina en un modelo de craneotomía y lesión cerebral en ratas. La autofluorescencia del colágeno en la duramadre regenerada se evaluó mediante microscopía confocal con excitación a λem = 488 nm y λem = 543 nm. Se observó un aumento en la regeneración de la matriz extracelular del tejido conectivo y un aumento en la fluorescencia de la matriz a las 6 semanas después de la duraplastía. Se observe un efecto significativo en la regeneración de la duramadre con las láminas de colágeno, las láminas en base de quitosano más gelatina y, en un menor grado, las láminas a base de quitosano. Mediante el uso de densitometría de autofluorescencia de la matriz extracelular, los autores lograron cuantificar el grado de regenera- ción del tejido conectivo en la duramadre después de la duraplastía.

Individual variation of tentorial notch morphometry in a series of neurocritical patients / Variación individual de la morfometría de la hendidura tentorial en una serie de pacientes neurocríticos

Background: Cadaveric studies on humans have shown anatomical variabilities in the morphometric characteristics of the tentorial notch. These anatomical variations could influence the worsening of neurocritical patients. Objectives: 1) To investigate the morphometric characteristics of the tentorial notch in neurocritical patients using computed tomography (CT); 2) To investigate the correlation between tentorial notch measurements by CT and by magnetic resonance imaging (MRI); and 3) To analyze the individual variability of the tentorial notch anatomy seen in neurocritical patients. Methods: Prospective series of neurocritical patients was examined. An imaging protocol for measurements was designed for CT and MRI. The level of the agreement of the measurements from CT and MR images was established. According to the measurements found, patients were divided into different types of tentorial notch. Results: We studied 34 neurocritical patients by CT and MRI. Measurements of the tentorial notch via CT and MRI showed significant agreement: concordance correlation coefficient of 0.96 for notch length and 0.85 for maximum width of tentorial notch. Classification of tentorial notch measurements according to the criteria established by Adler and Milhorat, we found the following: 15 patients (58%) corresponded to a "short" subtype; 7 (21%) to "small"; 3 (9%) to "narrow"; 2 (6%) to "wide"; 2 (6%) to "large"; 1 (3%) to "long"; and 4 (12%) to "typical". Conclusions: The anatomical variability of the tentorial notch could be detected in vivo by means of CT scan and MRI. Good agreement between the measurements made using these two imaging methods was found.

Antecedentes: Estudios cadavéricos en humanos han mostrado variabilidad anatómica en las características morfométricas de la hendidura tentorial (HT). Estas variaciones anatómicas podrían influir en el neurodeterioro agudo de los pacientes neurocríticos. Objetivos: 1) Investigar las características morfométricas de la HT en pacientes neurocríticos mediante tomografía computarizada (TC); 2) Investigar la correlación de las mediciones de la HT realizadas por TC y resonancia magnética (RM); 3) Analizar la variabilidad individual de la anatomía de la HT observada en pacientes neurocríticos. Métodos: Se examinó una serie prospectiva de pacientes neurocríticos. Se diseñó un protocolo de imágenes para mediciones por TC y RM. Se estableció la concordancia de las mediciones realizadas mediante TC y RM. Según las mediciones encontradas, los pacientes se dividieron en diferentes tipos de HT. Resultados: Estudiamos 34 pacientes neurocríticos por TC y RM. Las mediciones de la HT por TC y RM mostraron una concordancia significativa: coeficiente de correlación de concordancia de 0,96 para la longitud de la HT y 0,85 para el ancho máximo de la HT. Clasificando las medidas de la HT de acuerdo con los criterios establecidos por Adler y Milhorat, encontramos: 15 pacientes (58%) correspondieron al subtipo "corto", 7 (21%) al "pequeño", 3 (9%) al "estrecho" ", 2 (6%) a "ancho ", 2 (6%) al "grande ", 1 (3%) al "largo" y 4 (12%) al "típico". Conclusiones: Se pudo detectar variabilidad anatómica de la HT in vivo, mediante TC y RM. Se encontró una buena concordancia en las medidas obtenidas con ambos métodos imagenológicos.

Marginal zone lymphoma of the dura - two case reports with long-term follow-up.

Primary MALT lymphoma arising at the dura is a rare circumstance with no categorical therapeutic plan in literature. There are few reports available with different treatment courses. Here, we report two cases with a long-term follow-up after the same pattern of management and review the literature.

Percutaneous fetoscopic spina bifida repair: effect on ambulation and need for postnatal cerebrospinal fluid diversion and bladder catheterization.

OBJECTIVE: A trial comparing prenatal with postnatal open spina bifida (OSB) repair established that prenatal surgery was associated with better postnatal outcome. However, in the trial, fetal surgery was carried out through hysterotomy. Minimally invasive approaches are being developed to mitigate the risks of open maternal-fetal surgery. The objective of this study was to investigate the impact of a novel neurosurgical technique for percutaneous fetoscopic repair of fetal OSB, the skin-over-biocellulose for antenatal fetoscopic repair (SAFER) technique, on long-term postnatal outcome. METHODS: This study examined descriptive data for all patients undergoing fetoscopic OSB repair who had available 12- and 30-month follow-up data for assessment of need for cerebrospinal fluid (CSF) diversion and need for bladder catheterization and ambulation, respectively, from eight centers that perform prenatal OSB repair via percutaneous fetoscopy using a biocellulose patch between the neural placode and skin/myofascial flap, without suture of the dura mater (SAFER technique). Univariate and multivariate logistic regression analyses were used to examine the effect of different factors on need for CSF diversion at 12 months and ambulation and need for bladder catheterization at 30 months. Potential cofactors included gestational age at fetal surgery and delivery, preoperative ultrasound findings of anatomical level of the lesion, cerebral lateral ventricular diameter, lesion type and presence of bilateral talipes, as well as postnatal findings of CSF leakage at birth, motor level, presence of bilateral talipes and reversal of hindbrain herniation. RESULTS: A total of 170 consecutive patients with fetal OSB were treated prenatally using the SAFER technique. Among these, 103 babies had follow-up at 12 months of age and 59 had follow-up at 30 months of age. At 12 months of age, 53.4% (55/103) of babies did not require ventriculoperitoneal shunt or third ventriculostomy. At 30 months of age, 54.2% (32/59) of children were ambulating independently and 61.0% (36/59) did not require chronic intermittent catheterization of the bladder. Multivariate logistic regression analysis demonstrated that significant prediction of need for CSF diversion was provided by lateral ventricular size and type of lesion (myeloschisis). Significant predictors of ambulatory status were prenatal bilateral talipes and anatomical and functional motor levels of the lesion. There were no significant predictors of need for bladder catheterization. CONCLUSION: Children who underwent prenatal OSB repair via the percutaneous fetoscopic SAFER technique achieved long-term neurological outcomes similar to those reported in the literature after hysterotomy-assisted OSB repair. © 2021 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.

Introdução precoce da alimentação complementar infantil: comparando mães adolescentes e adultas / Introducción precoz de alimentación complementaria infantil: comparación entre madres adolescentes y adultas / Early introduction of complementary feeding in infants: comparing adolescent and adult mothers

Resumo Objetivo: Verificar a associação entre a idade materna e os motivos alegados pelas mães para o início precoce da alimentação complementar aos 30, 90 e 180 dias de vida da criança. Métodos: Trata-se de um estudo de coorte prospectivo, desenvolvido em uma maternidade do Sistema Único de Saúde de um município de médio porte do interior do Estado de São Paulo, Brasil. A amostra foi de 545 participantes, sendo 103 adolescentes e 442 adultas no período pós-parto. Os dados foram coletados de outubro de 2016 a outubro de 2017, face-a-face na maternidade e via telefone em 30, 90 e 180 dias após o pato, e analisados por meio dos testes Qui-Quadrado e Exato de Fisher. Resultados: Aos 30 dias pós-parto as adolescentes referiram motivos para introdução de chá relacionados às orientações de outras pessoas; já as adultas, referiram motivos relacionados à criança (p = 0,001). Aos 90 dias, para a introdução de água e chá, as adolescentes alegaram orientações de outras pessoas e as adultas alegaram motivos da criança (p = 0,004 para água e p < 0,001 para chá). Aos 180 dias, para a introdução de outro leite, adolescentes e adultas referiram motivos relacionados ao seu próprio desejo (p = 0,03). Conclusão: As adolescentes e adultas apresentaram motivos diferentes para a introdução de chá aos 30 dias pós-parto, para a introdução de água e chá aos 90 dias e apresentaram o mesmo motivo para a introdução de outro leite aos 180 dias pós-parto.

Resumen Objetivo: Verificar la relación entre la edad materna y los motivos indicados por las madres para el inicio precoz de la alimentación complementaria a los 30, 90 y 180 días de vida del bebé. Métodos: Se trata de un estudio de cohorte prospectivo, llevado a cabo en una maternidad del Sistema Único de Salud de un municipio de tamaño medio en el interior del estado de São Paulo, Brasil. La muestra fue de 545 participantes, de las cuales 103 eran adolescentes y 442 adultas en el período de posparto. Los datos fueron recopilados de octubre de 2016 a octubre de 2017, cara a cara en la maternidad y por teléfono a los 30, 90 y 180 días después del parto, y fueron analizados mediante la prueba χ2 de Pearson y la prueba exacta de Fisher. Resultados: A los 30 días de posparto, las adolescentes mencionaron motivos para la introducción de té relacionados con in strucciones de otras personas. Las adultas mencionaron motivos relacionados con el bebé (p = 0,001). A los 90 días, para la introducción de agua y té, las adolescentes declararon que siguieron instrucciones de otras personas y las adultas que fue por motivos del bebé (p = 0,004 para agua y p < 0,001 para té). A los 180 días, para la introducción de otra leche, las adolescentes y las adultas mencionaron motivos relacionados con su propio deseo (p = 0,03). Conclusión: Las adolescentes y adultas presentaron motivos diferentes para la introducción de té a los 30 días posparto y para la introducción de agua y té a los 90 días, y presentaron el mismo motivo para la introducción de otra leche a los 180 días posparto.

Abstract Objective: Check for associations between maternal age and the reasons provided by mothers for the early introduction of complementary feeding in infants at 30, 90 and 180 days after birth. Methods: This is a prospective cohort study, conducted in a maternity hospital of the Brazilian Unified Health System (SUS) located in a medium-sized city of the State of São Paulo, Brazil. The sample was made up of 545 participants - 103 adolescents and 442 adults in the postpartum period. Data were collected from October 2016 to October 2017, face to face, at the maternity hospital and via telephone 30, 90 and 180 days after birth, and analyzed using the Chi-square and Fisher's exact tests. Results: Thirty days after birth, the adolescent mothers mentioned recommendations of other people for introducing tea into the baby's diet; on the other hand, the adult mothers mentioned reasons related to the child (p=0.001). Ninety days after birth, the adolescent mothers reported recommendations for the introduction of water and tea from other people and the adult mothers reported reasons related to the child (p=0.004 for water and p<0.001 for tea). And 180 days after birth, the adolescent and adult mothers reported reasons related to their own choice for the introduction of another type of milk (p = 0.03). Conclusion: Adolescent and adult mothers presented different reasons for introducing tea 30 days after birth, for introducing water and tea 90 after birth, and presented the same reason for introducing another type of milk 180 days after birth.

Experimental study of the neurotoxic effects of photodynamic therapy on the spinal cord / Estudo experimental dos efeitos neurotóxicos da terapia fotodinâmica na medula espinhal / Estudio experimental de los efectos neurotóxicos de la terapia fotodinámica en la médula espinal

ABSTRACT Objective To evaluate the effects of photodynamic therapy (PDT) on the dura mater using the photosensitizers aluminum chloride phthalocyanine and methylene blue in in vivo assays. Methods Fifty-six male Wistar rats were divided into two groups; one submitted to PDT and the other submitted to the photosensitizers without their photoactivation (control). The photosensitizers were applied to the dura mater after laminectomy at the T10 level. The methods used for assessment were the Basso, Beattie and Bresnahan (BBB) functional evaluation scale and study of the dura mater by light microscopy. Results No changes in motor activity were observed in the animals submitted to PDT compared to control. Histological and pathological evaluation did not show any differences between the group exposed to activated photosensitizers and the control group with regard to the inflammatory process and tissue necrosis. Conclusion The joint use of PDT with the photosensitizing pharmaceuticals aluminum chloride phthalocyanine and methylene blue did not induce any clinical neurotoxic effects or histological changes in the dura mater of the animals studied. Level de evidence V; Expert Opnion.

RESUMO Objetivo Avaliar os efeitos da terapia fotodinâmica (PDT) na dura-máter usando os fotossensibilizadores cloreto de alumínio ftalocianina e azul de metileno em ensaios in vivo. Métodos Cinquenta e seis ratos Wistar machos divididos em dois grupos; um submetido à PDT e o outro submetido aos fotossensibilizadores sem a fotoativação (controle). Os fotossensibilizadores foram aplicados sobre a dura-máter depois de laminectomia no nível T10. Os métodos de avaliação usados foram a escala de avaliação funcional de Basso, Beattie e Bresnahan (BBB) e o estudo da dura-máter por microscopia óptica. Resultados Não foram observadas alterações da atividade motora dos animais submetidos à PDT com relação ao grupo controle. A avaliação histológica e histopatológica não mostrou diferenças entre o grupo exposto aos fotossensibilizadores ativados e o grupo controle, com relação ao processo inflamatório e à necrose tecidual. Conclusões O uso conjunto de PDT e os fármacos fotossensibilizantes cloreto de alumínio ftalocianina e azul de metileno não induziu efeitos neurotóxicos clínicos e/ou alterações histológicas sobre a dura-máter dos animais estudados. Nível de evidência V; Opinião de Especialista.

RESUMEN Objetivo Evaluar los efectos de la terapia fotodinámica (PDT) en la duramadre utilizando los fotosensibilizadores de ftalocianina de aluminio clorada y azul de metileno en ensayos in vivo. Métodos Cincuenta y seis ratas Wistar machos se dividieron en 2 grupos; uno fue sometido a PDT y el otro sometido a fotosensibilizadores sin fotoactivación (control). Los fotosensibilizadores se aplicaron a la duramadre después de la laminectomía en el nivel T10. Los métodos de evaluación utilizados fueron la escala de evaluación funcional de Basso, Beattie y Bresnahan (BBB) y el estudio de la duramadre mediante microscopía óptica. Resultados No hubo cambios en la actividad motora de los animales sometidos a PDT en relación con el grupo de control. La evaluación histológica e histopatológica no mostró diferencias entre el grupo expuesto a fotosensibilizadores activados y el grupo de control con respecto al proceso inflamatorio y la necrosis tisular. Conclusiones El uso conjunto de PDT con las sustancias fotosensibilizadores ftalocianina de aluminio clorada y azul de metileno no indujo efectos neurotóxicos clínicos o cambios histológicos en la duramadre de los animales estudiados. Nivel de evidencia V; Opinión del Especialista.

The effects of mobile phone exposure on mast cells in rat dura mater / Efectos de la exposición del teléfono móvil en los mastocitos de la duramadre de ratas

Mobile phone use has increased rapidly. The central nervous system has been shown to be adversely affected by its electromagnetic field (EMF) resulting in headache and sleep disturbances. How the cells make up the CNS and are affected by EMF is unclear. However, because of their central role in inflammation through diverse stimuli including radiation, this study aimed to investigate the effects of electromagnetic fields induced by mobile phones on mast cells in rat dura mater. A total of 18 adult, female, SpragueDawley rats were divided into two groups. The choice of female rats for his study was based on recent surveys demonstrating that mobile phone use is more frequent and prolonged among females. The study group was exposed to 900 MHz electromagnetic field (1 h/day for 45 days). In the end of the study, duramater tissue was extracted and stained using Toluidine blue. Mast cells were counted and results were analysed using Student t test. Mean mast cell number was 202.33±9.82 and 456.78±35.01 in the control and study groups, respectively (p<0.05). Analysis of serum electrolyte and immunoglobulin E levels showed no statistically significant difference between the two groups (p>0.05). The study showed that mobile phone exposure increased mast cell number and degranulation in rat dura mater. Further studies are required to evaluate the clinical implications of these findings.

El uso del teléfono móvil ha aumentado rápidamente. Se ha demostrado que el sistema nervioso central (SNC) se ve afectado de manera adversa debido al campo electromagnético (CEM) que produce dolor de cabeza y trastornos del sueño. No está claro cómo se ve afectada la composición celular del SNC por el CEM. Sin embargo, debido a su función principal en la inflamación a través de diversos estímulos que incluyen la radiación, este estudio tuvo como objetivo investigar los efectos de los campos electromagnéticos inducidos por los teléfonos móviles en los mastocitos de la duramadre de ratas. Un total de 18 ratas Sprague-Dawley adultas, hembras, se dividieron en dos grupos. Se usaron ratas hembras para este estudio en base a investigaciones recientes que han demostrado que el uso de teléfonos móviles es más frecuente y prolongado en las mujeres. Los grupos de estudio fueron expuestos a un campo electromagnético de 900 MHz (1 h / día durante 45 días). Al término del estudio, fue extirpado el tejido de la duramadre y teñido con azul de toluidina. Se contaron los mastocitos y se analizaron los resultados utilizando la prueba t de Student. La cantidad media de células cebadas fue de 202,33 ± 9.82 y 456,78 ± 35,01 en los grupos control y estudio, respectivamente (p <0,05). El análisis del electrolito sérico y los niveles de inmunoglobulina E no mostraron diferencias estadísticamente significativas entre los dos grupos (p> 0,05). El estudio mostró que la exposición a teléfonos móviles aumentó el número de mastocitos y la desgranulación en la duramadre de las ratas. Se requieren estudios adicionales para evaluar las implicaciones clínicas de estos hallazgos.

Extradural lumbar nerve root cavernous hemangioma: case report and successful surgical resection / Hemangioma cavernoso extradural de raiz nervosa lombar: relato de caso e ressecção cirúrgica bem-sucedida

Extradural lumbar spinal canal cavernous hemangiomas (or cavernomas) are rare lesions that can induce intense back pain and neurological deficit. We present a case report of a patient with a pure radicular lombar extradural cavernoma resembling a benign neurological tumor in imaging exams and a successful surgical resection.

Os hemangiomas cavernosos do canal vertebral lombar extradural (ou cavernomas) são lesões raras que podem induzir dor intensa no dorso e déficit neurológico. Apresentamos um relato de caso de um paciente com um cavernoma extradural lombar radicular puro assemelhando-se a um tumor neurológico benigno em exames de imagem e uma ressecção cirúrgica bem-sucedida.

A multiscale study of mercury transformations and dynamics at the chemocline of the Petit-Saut tropical reservoir (French Guiana).

This study investigated, on both metric and centimetric scales, mercury (Hg) transformations and dynamics within a water column chemocline of a tropical reservoir. Data collected included conventional measurement of Hg in water samples, diffusive gradients in thin-films (DGT) assessments, and thermodynamic speciation modeling in order to portray the biogeochemical processes that control elemental Hg (EM) and dissolved monomethylated Hg (MeHgD) production. The primary contribution of this study is demonstration that the DGT technique can be successfully implemented to examine labile Hg compound mobilization, and estimation of how local substratum facilitates Hg reduction and methylation reactions. DGT profiles with a resolution of 1cm revealed a fine sequence of prominent Hg reduction/oxidation reactions at the chemocline level. This is interpreted as a manifestation of both: i) kinetic effects capable of arising inside the diffusive layer of DGT devices, and ii) extremely localized production or consumption of reducible and methylable Hg. Another key result obtained at the metric scale is that EM and MeHgD production at a water column chemocline are intricately linked, as both are fueled by nutrients episodically released during the decomposition of falling epilimnetic organic particles or inhibited by dissolved organic matter and inorganic compounds continuously transported from the deeper monimolimnion. Finally, it is worth noting that the chemocline acts as an accumulation and recycling domain for falling MeHg-loaded organic particles, whereas the high primary productivity layer in the epilimnion represents the principal reactor with respect to Hg methylation and reduction.