Erdheim–Chester disease misdiagnosed as meningioma of the pontocerebellar angle: A case report and review of literature

Erdheim–Chester Disease (ECD) is a rare non-Langerhans form of systemic histiocytosis of unknown etiology with multiple organ involvement. It most commonly affects the long bones, lungs, heart, retroperitoneum, eyes, and kidneys and less commonly the brain and spinal cord. Although there are very few cases of supratentorial ECD mimicking intracranial meningioma reported in literature, to the best of our knowledge, there are no reports on ECD mimicking infratentorial pontocerebellar angle meningioma. The present study reports a case of ECD mimicking pontocerebellar angle meningioma. This study aimed to emphasize the importance of systemic evaluation using a multidisciplinary approach as well as the need for considering ECD as a differential diagnosis of xanthomatous meningioma.

Meningioma Meningotelial cerebeloso complicado con absceso único a Nocardia / Meningioma Meningotelial cerebellar complicated with unique abscess to Nocardia

La presentación de abscesos cerebrales relacionados a meningiomas es muy poco frecuente. Usualmente son causados por bacterias comunes, siendo la Nocardia un agente etiológico excepcional. Presentamos la primera descripción en Paraguay de un absceso cerebral a Nocardia Spp asociado a meningioma en un paciente inmunocomprometido por consumo prolongado de corticoides (dexametasona).

The presentation of cerebral abscesses related to meningiomas is very rare. They are usually caused by common bacteria, nocardia being an exceptional etiological agent. We present the first description in Paraguay of a cerebral abscess to Nocardia spp associated meningioma in an immunocompromised patient for prolonged corticosteroid consumption (dexamethasone).

STUDY OF MENINGIOMAS WITH HISTOPATHOLOGICAL AND RADIOLOGICAL CORRELATION

Background: Meningiomas are tumours originating from meningothelial cells. They are commonly located at intracranial, intraspinal or occasionally ectopic site. They show histological diversity and are categorized into three grades by WHO 2007 Classi?cation. This grading helps in predicting their behaviour and deciding treatment strategy. To study the frequency, clinical details, histological typing and grading of 50 cases of Aims and Objective: meningiomas. To evaluate diagnostic accuracy of radio-imaging and there correlation with histopathological diagnosis is made Total 50 cases of histopathologically con?rmed cases of meningiomas were studied with above mentioned Methods: aims and objectives. Analysis of histological features, typing and grading of all cases were done. Meningioma are the Result: most common extra-axial tumour. Obvious female predominance was observed. The most common histological subtype was meningothelial followed by ?broblastic. In all cases radiological diagnosis correlated with histopathological diagnosis Conclusion: Meningiomas are slow growing extra-axial tumours majority being intracranial, benign grade I followed by grade II and rarely grade III neoplasms occurring most commonly in elderly females

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.

Importancia pronóstica de las mutaciones del gen promotor de la transcriptasa inversa de la telomerasa en los meningiomas de alto grado / Prognostic significance of telomerase reverse transcriptase promoter gen mutations in high grade meningiomas

Introducción. En los meningiomas, ocurren con frecuencia mutaciones en la región promotora de la transcriptasa inversa de la telomerasa. Objetivo. Estimar la importancia pronóstica de las mutaciones de la transcriptasa inversa de la telomerasa en pacientes colombianos con meningiomas de grados II y III. Materiales y métodos. Es un estudio de cohorte, retrospectivo y multicéntrico, que incluyó pacientes con diagnóstico de meningioma persistente o recidivante, de grados II y III, según la clasificación de la OMS, reclutados entre el 2011 y el 2018, con tratamiento sistémico (sunitinib, everolimus con octreótido o sin él, y bevacizumab). El estado de la mutación del promotor de la transcriptasa inversa de la telomerasa se determinó por medio de la PCR. Resultados. Se incluyeron 40 pacientes, en 21 (52,5 %) de los cuales se encontraron mutaciones en la transcriptasa inversa de la telomerasa, siendo las variantes más frecuentes la C228T (87,5 %) y la C250T (14,3 %). Estas fueron más frecuentes entre los pacientes con meningiomas anaplásicos (p=0,18), en aquellos con más de dos recurrencias (p=0,04), y en los que presentaron lesiones en la región parasagital y la fosa anterior (p=0,05). Los sujetos caracterizados por tener alteraciones puntuales fueron tratados con mayor frecuencia con la serie de medicamentos everolimus, sunitinib y bevacizumab (p=0,06). Tras el inicio del tratamiento médico, la supervivencia global fue de 23,7 meses (IC95% 13,1-34,2) en los pacientes con mutaciones y, de 43,4 meses (IC95% 37,5-49,3), entre aquellos sin mutaciones (p=0,0001). Los resultados del análisis multivariado demostraron que, únicamente, el número de recurrencias y la presencia de mutaciones en el gen de la transcriptasa inversa de la telomerasa, fueron factores que afectaron negativamente la supervivencia global. Conclusiones. Las mutaciones en el gen promotor de la transcriptasa inversa de la telomerasa permiten identificar los pacientes con alto riesgo, cuya detección podría ser de utilidad para seleccionar el mejor esquema terapéutico.

Introduction: Mutations in the promoter region of telomerase reverse transcriptase occur frequently in meningiomas. Objective: To estimate the prognostic importance of telomerase reverse transcriptase mutations in Colombian patients with grades II and III meningioma. Materials and methods: This was a multicenter retrospective cohort study of patients diagnosed with refractory or recurrent WHO grades II and III meningiomas, recruited between 2011 and 2018, and treated with systemic therapy (sunitinib, everolimus ± octreotide, and bevacizumab). Mutation status of the telomerase reverse transcriptase promoter was established by PCR. Results: Forty patients were included, of which telomerase reverse transcriptase mutations were found in 21 (52.5%), being C228T and C250T the most frequent variants with 87.5 % and 14.3 %, respectively. These were more frequent among patients with anaplastic meningiomas (p=0.18), with more than 2 recurrences (p=0.04); and in patients with parasagittal region and anterior fossa lesions (p=0.05). Subjects characterized as having punctual mutations were more frequently administered with everolimus, sunitinib and bevacizumab drug series (p=0.06). Overall survival was 23.7 months (CI95% 13.1-34.2) and 43.4 months (CI95% 37.5-49.3; p=0.0001) between subjects with and without mutations, respectively. Multivariate analysis showed that the number of recurrences and the presence of telomerase reverse transcriptase mutations were the only variables that negatively affected overall survival. Conclusions: Mutations in telomerase reverse transcriptase allows the identification of high-risk patients and could be useful in the selection of the best medical treatment.

Correlación entre aspectos clínicos, imagenológicos e histopatológicos en el diagnóstico de tumores y seudotumores raquídeos extramedulares / Correlation between clinical, imaging, histological and pathological aspects in the diagnosis of spinal extramedular tumors and pseudotumors i: en

Introducción: Los tumores intradurales extramedulares son causa de morbilidad y mortalidad. Para identificarlos y analizarlos, la resonancia magnética resulta el método diagnóstico imagenológico de elección. Objetivo: Caracterizar a pacientes con tumores y seudotumores raquídeos intradurales extramedulares según variables clínicas, imagenológicas (por resonancia magnética) e histopatológicas. Métodos: Se efectuó un estudio observacional, descriptivo, longitudinal y prospectivo en 20 pacientes con diagnóstico clínico de sospecha de tumor o seudotumor intradural extramedular o no, confirmado mediante resonancia magnética, quienes fueron atendidos en el Departamento de Imagenología del Hospital General Docente Dr. Juan Bruno Zayas Alfonso de Santiago de Cuba de enero del 2014 a igual mes del 2017, procedentes de los hospitales generales de esta provincia y de Guantánamo. Resultados: Existió una mayor frecuencia del sexo masculino (70,0 %), principalmente en las edades de 60 y más años (30,0 %), así como del dolor vertebral (100,0 %) y las alteraciones de los reflejos osteotendinosos (65,0 %) como síntomas y signos de los procesos neoplásicos. Según la intensidad de las señales captadas en la resonancia magnética, primaron los tumores isointensos en la secuencia T1 (70,0 %) y los hiperintensos e isointensos en la secuencia T2 (35,0 % en cada uno), sobre todo de localización dorsal (60,0 %). Asimismo, el diagnóstico clínico de sospecha más usual fue el de mielopatía compresiva (25,0 %), en tanto, entre los diagnósticos imagenológicos e histopatológicos sobresalieron las metástasis y los meningiomas. Conclusiones: La resonancia magnética ofrece una aproximación al diagnóstico definitivo de estos tumores, el cual es corroborado con el estudio histopatológico.

Introduction: The intradural extraspinal tumors are morbidity and mortality cause. To identify and analyze them, the magnetic resonance is the imaging diagnostic means of election. Objective: To characterize patients with intradural extramedular spinal tumors and pseudotumors according to clinical, imaging (by magnetic resonance) histological and pathological variables. Methods: An observational, descriptive, longitudinal and prospective study was carried out in 20 patients with suspicious clinical diagnosis of intradural extraspinal tumor or pseudotumor or not, confirmed by means of magnetic resonance who were assisted in the Imaging Department of Dr. Juan Bruno Zayas Alfonso Teaching General Hospital in Santiago de Cuba from January, 2014 to the same month in 2017, coming from the general hospitals of this province and Guantánamo. Results: There was a higher frequency of the male sex (70.0 %), mainly 60 and more years (30.0 %), as well as of the vertebral pain (100.0 %) and disorders of the muscle stretch reflex (65.0 %) as symptoms and signs of the neoplasm processes. According to the intensity of the signs captured in the magnetic resonance, the isointense tumors prevailed in the sequence T1 (70,0 %) and the hyperintense and isointense in the sequence T2 (35.0 % in each one), mainly of dorsal localization (60.0 %). Also, the most common supicious clinical diagnosis was that of compressive myelopathy (25.0 %), as long as, among the imaging, histological and pathological diagnosis the metastasis and meningiomas were notable. Conclusions: The magnetic resonance offers an approach to the definitive diagnosis of these tumors, which is corroborated by means of the histological and pathological study.

An economic study of neuro-oncological patients in a large developing country: a cost analysis / Um estudo de análise econômica dos pacientes neuro-oncológicos em um grande país em desenvolvimento: uma análise de custos

Abstract Background Neuro-oncological patients require specialized medical care. However, the data on the costs incurred for such specialized care in developing countries are currently lacking. These data are relevant for international cooperation. Objective The present study aimed to estimate the direct cost of specialized care for an adult neuro-oncological patient with meningioma or glioma during hospitalization in the largest philanthropic hospital in Latin America. Methods The present observational economic analysis describes the direct cost of care of neuro-oncological patients in Santa Casa de São Paulo, Brazil. Only adult patients with a common primary brain tumor were included. Results Due to differences in the system records, the period analyzed for cost estimation was between December 2016 and December 2019. A group of patients with meningiomas and gliomas was analyzed. The estimated mean cost of neurosurgical hospitalization was US$4,166. The cost of the operating room and intensive care unit represented the largest proportion of the total cost. A total of 17.5% of patients had some type of infection, and 66.67% of these occurred in nonelective procedures. The mortality rate was 12.7% and 92.3% of all deaths occurred in emergency procedures. Conclusions Emergency surgeries were associated with an increased rate of infections and mortality. The findings of the present study could be used by policymakers for resource allocation and to perform economic analyses to establish the value of neurosurgery in achieving global health goals.

Resumo Antecedentes Pacientes neuro-oncológicos demandam tratamento médico especializado. Em países em desenvolvimento, há falta de dados sobre custos em neurocirurgia. Estes dados são relevantes para ajudar na cooperação internacional. Objetivo O presente estudo objetiva estimar o custo direto de um paciente neuro-oncológico adulto com meningioma ou glioma durante sua internação no maior hospital filantrópico da América Latina. Métodos A presente análise econômica observacional descreve os custos diretos de um paciente neuro-oncológico da Santa Casa de São Paulo. Apenas pacientes adultos e com os dois tumores cerebrais primários mais comuns foram considerados. Resultados Devido a uma mudança no sistema de prontuários, para análise de custos o período analisado foi de dezembro de 2016 a dezembro de 2019. Uma amostra significativa de pacientes com gliomas e meningiomas foi analisada. O custo médio da hospitalização foi de U$ 4.166. O tempo de sala cirúrgica e os cuidados em terapia intensiva representaram a maior proporção dentro do custo total. Um total de 17.5% dos pacientes teve algum tipo de infecção e 66.67% delas ocorreram em procedimentos não eletivos. A taxa de mortalidade foi de 12.5% e 92.3% dos óbitos ocorreram em procedimentos de urgência. Conclusões Cirurgias de urgência foram mais associadas a taxas de infecção e mortalidade. Os achados do presente estudo podem ser usados por planejadores em política pública de saúde para alocação de recursos e para análise econômica para estabelecer o valor dos procedimentos neurocirúrgicos para atingir metas mundiais.

STUDY OF CLINICAL PROFILE AND MANAGEMENT OF INTRADURAL EXTRAMEDULLARY SPINAL CORD (IDEM) TUMOURS (CONDUCTED AT A TERTIARY CARE CENTER IN CENTRAL MAHARASHTRA)

Aims and objectives: This study aims to analyse the complete profile of patients diagnosed and treated as IDEM spinal cord tumours. The factors studied include age, sex, clinical presentations, histopathology, surgical outcome and post operative recurrence. It is a single center prospective study conducted over a peri Materials and method: od of 18 months. Patient demographics, severity and duration of symptoms, and tumor characteristics (anatomical and pathological) in all operated spinal IDEM tumors were collected. The neurological findings obtained during the preoperative stage and the postoperative follow-up were evaluated according to the Frankel and Nurick grading. The back pain was assessed with help of the Denis pain scale (DPS). Data collected throughout preoperative and postoperative examination and investigations were analyzed and submitted to statistical procedures. Our study Results and analysis: included30 patients, majority being young adults between 20 to 30 years (46.66%). The male and female ratio in our study was 2:1. Predominant presentation was sensory symptoms like numbness, paraesthesia in extremeties (66.66%), followed by pain in back, limbs (33.33%). The most common location found was dorsal cord (50%) followed by lumbar(36.66%). The histopathological examination showed meningioma to be the most common (56.66%), followed by schwannoma (20%), and neurofibroma (16.66%). Pseudomeningocoele was the only complication encountered. Out of 30 patients we had operated, we could achieve total excision in 27 patients (90%). There was no postoperative worsening of symptoms, and no recurrence. The clinical and pre and postoperative profile suggested Summary and Conclusion: IDEM spinal cord tumours were common in 3rd decade, with male predominance. Commonest location was dorsal area with meningioma being the commonest histopathological finding.

Meningioma Meningoendotelial Associado à Tuberculose: um Relato de Caso / Tuberculosis-Associated Meningoendothelial Meningioma: a Case Report

O presente estudo relata um caso de coexistência entre um meningioma meningoendotelial associado a múltiplos granulomas epitelioides com focos de necrose caseosa, sendo possivelmente um dos primeiros casos relatados em imagens anatomopatológicas com imuno-histoquímica desta associação de um tumor com colonização pelo bacilo de Koch. Paciente de 79 anos, oligossintomática acompanhada por onze anos devido à lesão em tomografia sugestiva de meningioma, dá entrada em hospital terciário com história de crise convulsiva e dificuldade de falar. Após crises convulsivas recorrentes, foi indicada exérese tumoral, sendo observada em anatomopatológico a existência de múltiplos granulomas epitelioides com focos de necrose caseosa, sendo confirmada a presença de bacilos após aplicação da coloração de Ziehl-Neelsen e imuno-histoquímica. Observou-se a inexistência de sintomas e/ou achados laboratoriais/imaginológicos que demonstrassem sítio de colonização pelo bacilo. A maior vascularização desses tumores, a estase sanguínea e edema perilesional causado pela compressão das estruturas adjacentes e seu lento crescimento tornam os meningiomas ambientes propícios à colonização de bactérias, fungos, vírus e micobactérias. Além disso, compreende-se que os meningiomas possuem uma série de diagnósticos diferenciais clínico-radiológicos, sendo, muitas vezes, necessário o exame histopatológico e imuno- -histoquímico para a confirmação do diagnóstico.

This study reports a case of coexistence of a meningoendothelial meningioma associated with multiple epithelioid granulomas with foci of caseous necrosis, possibly one of the first cases reported in anatomopathological images with immunohistochemistry of this association of a tumor with colonization by Koch's bacillus. A 79-year-old patient, oligosymptomatic, followed for eleven years due to a tomography lesion suggestive of meningioma, was admitted to a tertiary hospital with a history of convulsive crisis and difficulty speaking. After recurrent convulsive crises, there was an indication for tumor excision, and the anatomopathological examination revealed multiple epithelioid granulomas with foci of caseous necrosis, confirming the presence of bacilli after the application of Ziehl-Neelsen staining and immunohistochemistry. No symptoms and/or laboratory/imaging findings demonstrated a site of colonization by the bacillus. The increased vascularity of these tumors, the blood stasis, and perilesional edema caused by compression of adjacent structures and their slow growth make meningiomas favorable environments for colonization by bacteria, fungi, viruses, and mycobacteria. Furthermore, it is understood that meningiomas have several clinical-radiological differential diagnoses, and histopathologic and immunohistochemical examinations are often necessary to confirm the diagnosis.

Meningiomas – transition from traditional histological grading to molecular profiling in WHO CNS5: A Review

Despite being the most common primary intracranial tumor, meningiomas are classified largely based on histological features. The current system of grading has been shown to be unsatisfactory due to its poor reproducibility as well as the considerable variability within grades. With the increasing availability of genomic and epigenomic profiling, several markers have been suggested to correlate with the location, histological subtype, and clinical behavior of meningiomas. These developments have enabled the development of targeted therapy, as well as individualized use of currently available adjuvant methods. These include copy number alterations (CNAs), specific genetic abnormalities (germline and sporadic), and genome-wide methylation profiles. In this review, we recapitulate the changes in the classification of meningiomas thus far, discuss the various histological subtypes recognized, and present the available literature on the genetic and epigenetic profiles of meningiomas. The recognition and further study of these markers have the potential to usher in an era of personalized therapy in the management of meningiomas, vastly improving outcomes as has been observed in the case of several other tumors.

Clinical and imaging analysis on meningiomas initially manifesting as intracranial hemorrhage in 19 cases / 中国基层医药

Objective:To investigate the main clinical characteristics, imaging features, diagnosis, and treatment of meningiomas initially manifesting as spontaneous intracranial hemorrhage.Methods:The clinical characteristics, imaging features, treatment, and follow-up data of 19 patients with meningiomas initially manifesting as spontaneous intracranial hemorrhage who received treatment in The First Affiliated Hospital of Shantou University Medical College from January 2011 to December 2020 were retrospectively analyzed.Results:Among the 19 patients, there were 6 males and 13 females, with an average age of (53 ± 14) years. The onset manifestations were sudden and severe headache and vomiting in 6 cases, progressive coma in 4 cases, and hemiplegia in 9 cases. Among the 19 patients, 15 patients showed irregular tumor shape and mixed hyperintense signal in CT, and 4 patients showed a homogeneous hyperintense signal. Eighteen patients showed peritumoral edema. Three patients showed intratumoral calcification. One patient showed an intratumoral fluid level. Fourteen patients showed isointense to hypointense signals on T1WI images and isointense to hyperintense signals on T 2WI images. Five patients showed mixed isointense and hyperintense signals on T 1WI images and mixed hypointense and hyperintense signals on T 2WI images. Heterogeneous enhancement was found in 18 patients, intratumoral cystic necrosis was found in 15 patients, and the meningeal tail sign was found in 16 patients. Preoperative imaging misdiagnosis occurred in 4 patients. Before surgery, all patients underwent surgery to resect the tumor and remove the hematoma. No patients died because of surgery. After surgery, muscle strength was improved compared with that before surgery. The average follow-up time was (46.5 ± 28.4) months. Tumor recurrence occurred in two patients. The Karnofsky Performance Scale score at the last follow-up, at discharge, and before surgery was (73.7 ± 3.4) points, (61.1 ± 5.5) points, and (49.5 ± 5.6) points, respectively ( F = 21.06, P < 0.01). The Karnofsky Performance Scale score at the last follow-up was significantly increased compared with that at discharge and before surgery ( F = 13.13, P < 0.01). Conclusion:Spontaneous hemorrhagic meningioma is rare and has a sudden onset. It is easily misdiagnosed before surgery. Skull CT, skull CT angiography, and enhanced magnetic resonance imaging examination in combination can increase the preoperative diagnosis rate. Early surgical resection of tumors and removal of hematoma can acquire good clinical efficacy.

Comparative analysis of somatostatin analog uptake between successfully irradiated and non-irradiated meningiomas

Abstract Objective To evaluate whether there is a significant difference in somatostatin analog uptake in meningiomas treated or not with radiation therapy. Methods A cross-sectional study was performed comparing measurements of somatostatin analog (68Ga-DOTATATE) uptake in two independent groups of ten patients each - one consisting of patients with meningiomas previously treated with radiation therapy and another comprising patients who had never been submitted to radiation therapy. All patients underwent PET/CT and MRI scans in an interval shorter than 24 hours between exams. Results A total of 32 meningiomas from 20 patients were analyzed, all presenting significant somatostatin analog uptake in different degrees. The uptake levels of somatostatin analog were similar between the lesions treated or not with radiation therapy, and the mean values of SUVmax were 27.62 and 24.82, respectively (p=0.722). For SUVmean, the values were 16.20 and 14.82, respectively (p=0.822). Conclusion Comparative analysis between the groups showed no significant differences in degree of somatostatin analog uptake in successfully irradiated and non-irradiated meningiomas.

Lymphoplasmacyte-rich meningioma with hematologic signs and PD-L1 over-expression

ABSTRACT Lymphoplasmacyte-rich meningioma (LPRM) is one of the rarest variants of grade I meningiomas. It can be clinically associated with prominent peripheral blood abnormalities, anemia, and/or various gammopathy, which usually disappear after surgical removal of the tumor. We document a case of right frontal LPRM in a 72-year-old male who presented general cognitive decadence. The patient suffered from mild anemia. The LPRM is a rare variant of meningioma, with only a few cases globally reported in the literature. It has been categorized as a grade I tumor in the 2021 World Health Organization (WHO) classification central nervous system. Due to the rarity, this meningioma variant origin and biological behavior are still not clear. Immunohistochemistry profile showed prominent PD-L1 expression, leading to additional interrogation on LPRM immunomorphological characteristics, the significance of the inflammatory tumoral microenvironment and its correlation with the immune-checkpoints.

Study on the methylation status of MGMT in meningiomas and its effect on the growth and metastasis of meningioma cells / 中国医师杂志

Objective:To investigate the methylation status of O6-methylguanine-DNA methyltransferase (MGMT) in meningioma tissue and its effect on the growth and metastasis of human meningioma cell line IOMM-Lee cells.Methods:The specimens of 34 patients with meningioma were collected. Methylation-specific polymerase chain reaction (MSP) method was used to detect MGMT methylation in meningioma tissue and normal brain tissue; immunohistochemical staining was used to detect the expression of MGMT in meningioma tissue and normal brain tissue. The cultured human glioma cell line IOMM-Lee cells were divided into blank control group (normal cultured IOMM-Lee cells), negative control group (empty vector virus transfected IOMM-Lee cells) and RNAi lentivirus transfection group (transfected with RNAi lentivirus vector to down-regulate the expression of MGMT). The expression of MGMT in IOMM-Lee cells was silenced by RNAi technology. The expression levels of MGMT mRNA and protein in cells were detected by real-time fluorescence quantitative PCR and Western blot. The proliferation activity of cells was detected by cell counting kit-8 (CCK-8) test, the colony forming ability was detected by cell clone formation test, and the invasion and migration ability of cells in each group were detected by Transwell test and cell scratch test.Results:The methylation of MGMT in meningioma tissue reached 88.23% (30/34). MGMT methylation was not detected in normal brain tissue; the staining intensity of MGMT in meningioma tissue was significantly higher than that in normal brain tissue. Compared with the blank control group and the negative control group, the relative expression of MGMT mRNA and protein in IOMM-Lee cells of the RNAi lentiviral transfection group were significantly decreased (all P<0.05). After 24, 48 and 72 hours of transfection, the proliferation activity of IOMM-Lee cells decreased significantly (all P<0.05), with reduced number of cell clone formation and cell invasion (all P<0.05). The rate of scar healing decreased significantly ( P<0.05). Conclusions:MGMT is mostly hypermethylated in human meningiomas. Silencing the expression of MGMT in meningiomas can inhibit the growth and metastasis of meningiomas.

Effect of dynamic traction technique on postoperative complications, stress response and neurological function recovery in patients with petroclival meningioma undergoing microscopic resection / 中国医师进修杂志

Objective:To investigate the effect of dynamic traction technique on postoperative complications, stress response and neurological function recovery in patients with petroclival meningioma undergoing microscopic resection.Methods:The clinical data of 80 patients with petroclival meningioma in Huanggang Central Hospital of Hubei Province from January 2017 to December 2019 were retrospectively analyzed. Among them, 38 cases were treated with automatic retractor technique (automatic traction group), and 42 cases were treated with dynamic traction technique (dynamic traction group). The operation time, postoperative hospital stay, postoperative complications of brain traction injury and the degree of Simpson tumor resection were compared between 2 groups. The levels of serum stress indexes before and after operation were detected, including C-reactive protein (CRP), interleukin-6 (IL-6) and white blood cell count (WBC). Karnofsky performance status (KPS) score was performed 6 months after operation, and the recovery rate of neurological function (KPS score≥80) and recurrence rate were counted.Results:There were no significant differences in operation time, postoperative hospital stay and the degree of Simpson tumor resection between 2 groups ( P>0.05). The incidence of postoperative complications of brain traction injury in dynamic traction group was significantly lower than that in automatic traction group: 4.76% (2/42) vs. 21.05% (8/38), the recovery rate of neurological function 6 months after operation was significantly higher than that in automatic traction group: 83.33% (35/42) vs. 39.47% (15/38), and there were statistical differences ( P<0.05 or<0.01). The serum CRP, IL-6 and WBC in dynamic traction group were significantly lower than those in automatic traction group: (24.11±5.86) mg/L vs. (28.42±5.94) mg/L, (10.52±2.29) pg/L vs. (12.45±2.46) pg/L and (9.24±2.43) ×10 9/L vs. (10.84±2.38) ×10 9/L, and there were statistical differences ( P<0.01). No recurrence was found in both groups. Conclusions:Dynamic traction technique in microscopic resection of petroclival meningioma can effectively reduce the postoperative complications of brain traction injury, reduce surgical stress, promote the recovery of neurological function, and improve the prognosis of patients.

Microsurgical removal of intraspinal meningioma: Skill required and surgical effect / 中华显微外科杂志

Objective:To investigate the effect of treatment of spinal meningioma with microsurgical procedures.Methods:From January 2003 to March 2022, there were 120 patients who had spinal meningioma and treated in the Department of Neurosurgery, The First Affiliated Hospital of Sun Yat-sen University. Their clinical data were retrospectively analysed. Of the 120 patients, there were 90 females and 30 males, aged from 14 to 85 (average, 54) years old. According to McCormick Classification, 29 cases were in grade I, 59 cases were in grade II, 25 cases were in grade III, and 7 cases were in grade IV. They were all underwent microsurgery. Patients were followed up by outpatient service within 3 months after surgery, then reviewed by outpatient visits and telephone interviews. McCormick's classification method and MRI examination were used to analyse the neurological and imaging changes of the patients before and after the surgery.Results:A total of 113 patients had complete resection and 7 had the resection of most part of the spinal meningioma. No infection, cerebrospinal fluid leakage, other complications and death occurred. Three months after surgery, 95 patients achieved the improvement or even completely disappearance of symptoms (such as numbness, pain, limited movement, etc.). There were 23 patients who had the symptoms unchanged as what before the surgery. Two patients had the symptoms worsened after the surgery. At 3 months after surgery, 95 cases (79.2%) improved, 23 cases (19.2%) were stable, and 2 cases (1.6%) aggravated. According to McCormick classification method, 92 cases were in grade Ⅰ, 15 cases were in gradeⅡ, 10 cases were in grade Ⅲ, and 3 cases were in grade Ⅳ. MRI scans showed that the dural sac were well refluxed, and no recurrence was found.Conclusion:Microsurgery is safe and effective for removal of spinal meningioma, with significant improvement in symptoms with fewer complications.

Unilateral papilledema and peripapillary polypoidal choroidal vasculopathy as the presenting manifestations of intracranial hypertension / Papiledema unilateral e vasculopatia polipoidal da coroide peripapilar como sinais de apresentação de hipertensão intracraniana

ABSTRACT We have reported here the case of a 54-year-old woman with intracranial hypertension that presented with the unique features of unilateral papilledema and peripapillary polypoidal choroidal vasculopathy. Our investigations lead to the diagnosis of idiopathic intracranial hypertension and an incidental small right frontal meningioma. The patient was accordingly treated with oral acetazolamide, followed by three consecutive monthly intravitreal injections of bevacizumab, which resulted in the inactivation of the polypoidal choroidal vasculopathy, marked reduction of lipid exudation, and complete absorption of the subretinal fluid. This case serves as the first documentation of polypoidal choroidal vasculopathy associated with papilledema. It also demonstrates that choroidal vascular abnormalities may occur even when optic disk edema is unilateral, which is an uncommon manifestation of increased intracranial pressure. Prompt recognition of such findings and its appropriate management are essential for adequate treatment and prevention of irreversible visual loss.

RESUMO Relatamos um caso de uma paciente de 54 anos com hipertensão intracraniana que apresentava achados atípicos de papiledema unilateral e vasculopatia polipoidal da coroide peripapilar. A investigação levou ao diagnóstico de hipertensão intracraniana idiopática e de um pequeno meningioma incidental. A paciente foi tratada com acetazolamida por via oral, seguida de três injeções intravítreas mensais de bevacizumabe, resultando em inatividade da vasculopatia polipoidal da coroide, redução da exsudação e completa absorção do líquido subretiniano. A apresentação deste caso serve para documentar pela primeira vez vasculopatia polipoidal da coroide associada a papiledema. Ele também demonstra que podem ocorrer anormalidades vasculares da coroide mesmo quando o edema do disco óptico é unilateral, uma manifestação incomum do aumento da pressão intracraniana. O reconhecimento imediato desses achados e seu manejo adequado são essenciais para o tratamento adequado e para prevenção da perda visual irreversível.

Meningioma como causa poco común de hiposmia. A propósito de un caso

Resumen La afectación del sentido del olfato puede pasar desapercibida en gran parte de los pacientes, siendo únicamente valorada cuando la alteración es importante. Sin embargo, la hiposmia es un síntoma asociado a numerosas patologías, de menor a mayor gravedad. Este sentido está relacionado con nuestros recuerdos y puede alertarnos de potenciales amenazas. Como médicos especialistas en Otorrinolaringología debemos estar alerta ante determinados síntomas que orienten a posible etiología central. Presentamos el caso de una mujer de 39 años que acudió al Servicio de Otorrinolaringología del Hospital General Universitario Morales Meseguer derivada por hiposmia de un año de evolución con cervicalgia y cefalea occipital progresiva, sin otra sintomatología asociada. La exploración otorrinolaringológica resultó normal. Debido a la persistencia sintomática se solicitó una tomografía computarizada de senos paranasales con hallazgos de masa intracraneal extraaxial compatible con meningioma de fosa craneal anterior.

Abstract The affectation of smell can go unnoticed in a great part of the patients, being only valued when the alteration is important. However, this sense is related to our memories and can alert us to potential threats. As otolaryngologists we must be alert to certain symptoms that may lead to a possible central aetiology. We present the case of a 39-year-old woman who went to the otolaryngology service at Morales Meseguer General University Hospital due to one-year evolution of hyposmia with cervicalgia and progressive occipital headache, with no other symptoms associated. The otolaryngology examination was anodyne. In view of symptomatic persistence, a paranasal sinus computed tomography scan was requested with findings of extra-axial intracranial mass compatible with anterior cranial fossa meningioma.

Rare Case of Young Patient with Intraventricular Angiomatous Meningioma

Pediatricmeningiomas are rare and account for only 2.2% of the central nervous system (CNS) tumors. In this age group, they aremore frequently located in atypical sites, such as, mainly, the ventricular system, with a frequency of 8.8 to 13.6%. Adding this to the fact that the angiomatous subtype constitutes only 2.1% of allmeningiomas, the rarity of the case reported here is corroborated. We report a 17-year-old female patient diagnosed with intraventricular angiomatous meningioma; she underwent surgical resection of the tumor in the body and frontal horn of the right lateral ventricle, and there were no neurological sequelae. With a follow-up of 26 months, there was no recurrence and the patient had clinical stability. Intraventricular tumors usually have slow growth and reach a considerable size until they cause symptoms and then are diagnosed. In addition, the deep location of the tumor and its proximity to eloquent areas make these tumors a neurosurgical challenge. The angiomatous subtype, due to the presence of hypervascularization (consisting of > 50% of vascular components), may, in some cases, hinder surgical resection as well as be erroneously diagnosed. However, surgical treatment aimed at total resection of the lesion remains the conduct of choice in the case reported here, especially in patients in the first two decades of life, in which the use of radiation is avoided. Specifically when it comes to the surgery, we chose a transcalosal approach that allows a good transoperative visualization of the lesion when located in the body and frontal horn of the lateral ventricle.

Meningiomas de fosa posterior: nomenclatura con orientación anatomo-quirúrgica y presentación de casos ilustrativos / Posterior fossa meningiomas: nomenclature with anatomical-surgical orientation and presentation of illustrative cases

Introducción: Los meningiomas de la fosa posterior representan el 20% de todos los meningiomas intracraneales. Cada subtipo tiene una base de implantación, abordaje quirúrgico y morbimortalidad postoperatoria muchas veces diferente. Advertimos que en reuniones científicas y publicaciones no se sigue una forma de clasificar uniforme, sencilla y clara con orientación netamente quirúrgica. Esto genera que el neurocirujano en formación no cuente con herramientas suficientes para la toma de decisiones. Objetivos: Proponer una clasificación sencilla de los meningiomas de la fosa posterior con un fundamento anatomo-quirúrgico y presentar casos ilustrativos de cada subtipo. Materiales y métodos: Se estableció una nomenclatura considerando reportes previos, el criterio anatómico y la experiencia quirúrgica de los autores. Se presentaron casos revisando las historias clínicas y los archivos de imágenes correspondientes a cada subtipo de la clasificación. Resultados: Representamos a la fosa posterior como un compartimento con 3 anillos: el superior se divide en medial, lateral-anterior y lateral-posterior; el medio se divide en 6 variantes: clivales puros, esfeno-petro-clivales, petrosos anteriores, petrosos posteriores y de la convexidad suboccipital medial y lateral; el inferior se divide en anterior, lateral derecho, lateral izquierdo y posterior. Conclusión: Los meningiomas del anillo superior pueden resolverse mediante una vía suboccipital medial o lateral; los del anillo medio tienen un espectro de opciones más diverso; los del anillo inferior -siguiendo el esquema de división en cuadrantes de un reloj- pueden resolverse por medio de un abordaje suboccipital medial o extremolatera

Introduction: Posterior fossa meningiomas represent 20% of all meningiomas, being each location associated with a specific approach, morbidity and mortality. The actual classifications are focus on the dural attachment, without associating the anatomical with the surgical aspects, useful to the young neurosurgeons for decision making. Objectives: To propose a classification of the posterior fossa meningiomas with an anatomical-surgical view including the presentation of cases. Materials and Methods: A nomenclature was established concerning previous reports, the anatomical criteria and the surgical experience of the authors. Cases were presented by reviewing the medical records corresponding to each subtype of the proposed classification. Results: We represent the posterior fossa as a 3 rings compartment: the upper one is divided into medial, anterior-lateral and posterior-lateral; the middle ring is divided into 6 variants: pure clival, spheno-petro-clival, anterior petrosal, posterior petrosal, and medial and lateral suboccipital convexity; the lower ring is divided into anterior, right lateral, left lateral, and posterior. Conclusion: Superior ring meningiomas can be resolved by a medial or lateral suboccipital approach; middle ring meningiomas have a more diverse spectrum of options; while meningiomas of the inferior ring - following the scheme of division into quadrants of a clock - can be resolved by means of a medial or extreme-lateral suboccipital approach.