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1.
Acta Neurochir (Wien) ; 164(2): 451-457, 2022 02.
Artículo en Inglés | MEDLINE | ID: mdl-33721109

RESUMEN

BACKGROUND: Sodium fluorescein (fluorescein) crosses a disrupted blood-brain barrier similarly to gadolinium contrast in contrast-enhancing cerebral tumors. When exposed to light with 560 nm wavelength during surgery, fluorescein emits a yellow-green fluorescent light that can be visualized through an operating microscope equipped with an appropriate emission filter. The distribution of the fluorescence correlates with the contrast on a gadolinium contrast-enhanced MRI. OBJECTIVE: The objective of this single-center retrospective study was to investigate if the use of fluorescein would increase the extent of resection and to examine if fluorescein guided resection influences postoperative neurological status. METHODS: During the study period from August 2014 to August 2018, 117 patients were operated for cerebral metastases. Of these, 56 operations were guided by fluorescein and 61 by traditional white light. All patients had an early postoperative MRI within 72 h after surgery. RESULTS: The use of fluorescein increased the extent of resection in patients with cerebral metastases. The use of fluorescein was not associated with increased postoperative sequelae or neurological damage regardless of underlying primary cancer. CONCLUSION: Fluorescein is a helpful supplement in the neurosurgical treatment of cerebral metastases.


Asunto(s)
Neoplasias Encefálicas , Neoplasias Supratentoriales , Neoplasias Encefálicas/diagnóstico por imagen , Neoplasias Encefálicas/patología , Neoplasias Encefálicas/cirugía , Fluoresceína , Colorantes Fluorescentes , Humanos , Procedimientos Neuroquirúrgicos , Estudios Retrospectivos , Neoplasias Supratentoriales/cirugía
2.
Acta Neurochir (Wien) ; 164(5): 1365-1373, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-35257217

RESUMEN

BACKGROUND: Primary CNS lymphoma (PCNSL) is a highly aggressive non-Hodgkin lymphoma (NHL) that occurs in the CNS (e.g. brain, meninges, spinal cord, cerebrospinal fluid, or intraocular involvement) in the absence of systemic NHL. Tumor resection does not improve survival, and neurosurgical intervention is generally limited to stereotactic biopsy to provide a histopathological diagnosis. OBJECTIVE: The objective of this single-center study was to evaluate the management and outcome of PCNSL patients diagnosed by biopsy, using overall survival and progression-free survival as endpoints. METHODS: At our department of neurosurgery, 140 patients were diagnosed with PCNSL by biopsy between January 1, 2009, and December 31, 2018. Of these, 37 patients were included in the study and were divided into three groups according to their postoperative therapy. RESULTS: Median OS was 35.7 months for the intensive treatment group, 29.5 months for the moderate treatment group, and 8.6 months for the palliative treatment group. The intensive and moderate treatment groups had similar progression-free survival, while the palliative treatment group had poor overall and progression-free survival. Six patients were long-term survivors (> 80 months). Age under 65 years was the main significant parameter affecting overall survival. CONCLUSION: In this cohort, patients with PCNSL had an overall fair prognosis if they (1) were under 65 years old, (2) had a performance score < 2 at the time of diagnosis, and (3) received either intensive or moderate chemotherapeutic treatment. Biopsy is still the primary diagnostic tool; other methods have been investigated but are not yet recommended.


Asunto(s)
Neoplasias del Sistema Nervioso Central , Linfoma no Hodgkin , Anciano , Encéfalo/patología , Neoplasias del Sistema Nervioso Central/diagnóstico , Neoplasias del Sistema Nervioso Central/terapia , Estudios de Cohortes , Humanos , Linfoma no Hodgkin/diagnóstico , Linfoma no Hodgkin/patología , Linfoma no Hodgkin/terapia , Procedimientos Neuroquirúrgicos/métodos , Pronóstico , Supervivencia sin Progresión , Estudios Retrospectivos , Resultado del Tratamiento
3.
Surgeon ; 18(6): 344-348, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-32044289

RESUMEN

INTRODUCTION: Glioblastoma has a high mortality rate. Current treatment includes largest possible surgical resection of the tumour using neuronavigation and fluorescence to better identify tumour tissue. In recent years, sodium fluorescein has been reintroduced in neurosurgery as a fluorescence to increase the resection rate. In this study we aimed to measure the surgeons experience of using sodium fluorescein to locate and remove tumour tissue. Furthermore we describe a case of sodium fluorescein tissue distribution. MATERIAL AND METHODS: 13 patients with glioblastoma and seven patients with cerebral metastases undergoing surgical resection were included. Surgery was performed using microscope alternating between white light and the YELLOW 560 filter, which visualized sodium fluorescein. Surgeons graded its usability in terms of location and removal on a scale from one to four. The resection rate was determined by neuroradiologists. Tissue samples obtained during surgery were analysed in relation to fluorescence and dysmorphic cells. RESULTS: Surgeons reported high usability in terms of location and removal of tumours using sodium fluorescein with medians of four in all groups, except for sub-total resections which had a median of three. Surgical complications were minimal and both resection rate and survival rate was within international standards. Histological analysis showed a visual correlation between tumorous tissue and intensity of fluorescence. CONCLUSION: Sodium fluorescence is an effective and useful tool for surgeons during fluorescence-guided surgery for the resection of glioblastoma and cerebral metastases.


Asunto(s)
Neoplasias Encefálicas/cirugía , Fluoresceína , Colorantes Fluorescentes , Glioblastoma/cirugía , Anciano , Anciano de 80 o más Años , Neoplasias Encefálicas/mortalidad , Neoplasias Encefálicas/patología , Estudios de Cohortes , Femenino , Glioblastoma/mortalidad , Glioblastoma/patología , Humanos , Masculino , Persona de Mediana Edad , Pautas de la Práctica en Medicina
4.
Acta Anaesthesiol Scand ; 63(3): 329-336, 2019 03.
Artículo en Inglés | MEDLINE | ID: mdl-30328110

RESUMEN

BACKGROUND: Compromised cerebral energy metabolism is common in patients with bacterial meningitis. In this study, simultaneous measurements of cerebral oxygen tension and lactate/pyruvate ratio were compared to explore whether disturbed energy metabolism was usually caused by insufficient tissue oxygenation or compromised oxidative metabolism of pyruvate indicating mitochondrial dysfunction. SUBJECT AND METHODS: Ten consecutive patients with severe streptococcus meningitis were included in this prospective cohort study. Intracranial pressure, brain tissue oxygen tension (PbtO2 ), and energy metabolism (intracerebral microdialysis) were continuously monitored in nine patients. A cerebral lactate/pyruvate (LP) ratio <30 was considered indicating normal oxidative metabolism, LP ratio >30 simultaneously with pyruvate below lower normal level (70 µmol/L) was interpreted as biochemical indication of ischemia, and LP ratio >30 simultaneously with a normal or increased level of pyruvate was interpreted as mitochondrial dysfunction. The biochemical variables were compared with PbtO2 simultaneously monitored within the same cerebral region. RESULTS: In two cases, the LP ratio was normal during the whole study period and the simultaneously monitored PbtO2 was 18 ± 6 mm Hg. In six cases, interpreted as mitochondrial dysfunction, the simultaneously monitored PbtO2 was 20 ± 6 mm Hg and without correlation with the LP ratio. In one patient, exhibiting a pattern interpreted as ischemia, PbtO2 decreased below 10 mm Hg and a correlation between LP and PbtO2 was observed. CONCLUSION: This study demonstrated that compromised cerebral energy metabolism, evidenced by increased LP ratio, was common in patients with severe bacterial meningitis while not related to insufficient tissue oxygenation.


Asunto(s)
Química Encefálica , Citoplasma/metabolismo , Meningitis Neumocócica/metabolismo , Consumo de Oxígeno , Anciano , Anciano de 80 o más Años , Análisis de los Gases de la Sangre , Isquemia Encefálica/etiología , Isquemia Encefálica/metabolismo , Estudios de Cohortes , Metabolismo Energético , Femenino , Humanos , Presión Intracraneal , Ácido Láctico/metabolismo , Masculino , Persona de Mediana Edad , Mitocondrias/metabolismo , Oxidación-Reducción , Estudios Prospectivos , Ácido Pirúvico/metabolismo , Resultado del Tratamiento
5.
Acta Neurochir (Wien) ; 161(3): 555-565, 2019 03.
Artículo en Inglés | MEDLINE | ID: mdl-30756241

RESUMEN

BACKGROUND: This study aimed to investigate the incidence of residual tumour after resection of brain metastases using early postoperative magnetic resonance imaging (MRI) and the influence of residual tumour on overall patient survival. METHODS: Data from 72 consecutive adult patients undergoing surgery for cerebral metastases over an 18-month study period were retrospectively collected. Early postoperative MRI was used to determine the presence of postoperative residual tumour. Patients were divided into three groups according to the presence of tumour remnant on early postoperative MRI: "no residual tumour", "non-measurable residual tumour" and "measurable residual tumour". Survival analysis (mean estimate survival time) was performed using the Kaplan-Meier and log-rank (mantel cox) tests and compared between groups. Surgical reports were evaluated with regard to the surgeon statement about intraoperative extent of resection (EOR) and compared with the presence of tumour remnant found on the early postoperative MRI. RESULTS: Sixty-eight procedures were followed by early postoperative MRI. MRI verified the presence of "measurable residual tumour" following 15 procedures (22%). MRI confirmed complete resection in 57%. Gross total resection was described by the operating surgeon in 85% of the procedures. There was a significant difference in survival time after surgery between the group having no residual tumour on MRI and the group with measurable residual tumour (p = 0.025). This difference could not be explained by the differences in postoperative radiation therapy. The longest survival was found in patients with non-measurable and no residual tumour on early postoperative MRI, who also received postoperative radiotherapy. CONCLUSION: Residual tumour was seen on MRI after 22% of the procedures. The intraoperative assessment of EOR performed by the surgeon diverged from the early postoperative MRI in 40% of procedures. Correct assessment of residual tumour thus requires early postoperative MRI. Measurable residual tumour on early postoperative MRI was associated with shorter overall survival independent on postoperative radiotherapy.


Asunto(s)
Neoplasias Encefálicas/cirugía , Imagen por Resonancia Magnética/métodos , Complicaciones Posoperatorias/epidemiología , Adulto , Anciano , Neoplasias Encefálicas/diagnóstico por imagen , Neoplasias Encefálicas/secundario , Femenino , Humanos , Masculino , Persona de Mediana Edad , Neoplasia Residual , Procedimientos Neuroquirúrgicos/efectos adversos , Procedimientos Neuroquirúrgicos/métodos , Complicaciones Posoperatorias/diagnóstico por imagen , Análisis de Supervivencia
6.
J Neurooncol ; 126(1): 47-55, 2016 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-26428358

RESUMEN

Over-expressed microRNAs (miRs) are promising new targets in glioblastoma (GBM) therapy. Inhibition of over-expressed miRs has been shown to diminish GBM proliferation, invasion and angiogenesis, indicating a significant therapeutic potential. However, the methods utilized for miR inhibition have had low translational potential. In clinical trials convection-enhanced delivery (CED) has been applied for local delivery of compounds in the brain. The aim of this study was to determine if safe and efficient miR inhibition was possible by CED of an anti-miR. We used a highly invasive GBM orthotopic xenograft model and targeted a well-validated miR, let-7a, with a 2'-O-methoxyethyl anti-miR with a combined phosphodiester/phosphorothioate backbone to establish an initial proof of concept. In vitro, anti-let-7a was delivered unassisted to the patient-derived T87 glioblastoma spheroid culture. In vivo, anti-let-7a or saline were administered by CED into orthotopic T87-derived tumors. After 1 month of infusion, tumors were removed and tumor mRNA levels of the target-gene High-mobility group AT-hook 2 (HMGA2) were determined. In vitro, 5 days inhibition was superior to 1 day at de-repressing the let-7a target HMGA2 and the inhibition was stable for 24 h. In vivo, anti-miR integrity was preserved in the pumps and no animals showed signs of severe adverse effects attributable to the anti-miR treatment. HMGA2 tumor level was significantly de-repressed in the anti-miR treated animals. The results showed-as an initial proof of concept-that miRs can be efficiently inhibited using CED delivery of anti-miR. The next step is to apply CED for anti-miR delivery focusing on key oncogenic miRs.


Asunto(s)
Antineoplásicos/uso terapéutico , Neoplasias Encefálicas/terapia , Glioblastoma/terapia , MicroARNs/metabolismo , Animales , Antineoplásicos/administración & dosificación , Neoplasias Encefálicas/metabolismo , Línea Celular Tumoral , Convección , Sistemas de Liberación de Medicamentos , Glioblastoma/metabolismo , Glioma/patología , Proteína HMGA2/genética , Proteína HMGA2/metabolismo , Humanos , Ratones , Ratones Desnudos , MicroARNs/genética , Oligonucleótidos Antisentido/administración & dosificación , Oligonucleótidos Antisentido/uso terapéutico , ARN Mensajero/metabolismo , Estadísticas no Paramétricas , Transfección , Ensayos Antitumor por Modelo de Xenoinjerto
7.
J Neurooncol ; 128(3): 395-404, 2016 07.
Artículo en Inglés | MEDLINE | ID: mdl-27063952

RESUMEN

Glioblastomas always recur despite surgery, radiotherapy and chemotherapy. A key player in the therapeutic resistance may be immature tumor cells with stem-like properties (TSCs) escaping conventional treatment. A group of promising molecular targets are microRNAs (miRs). miRs are small non-coding RNAs exerting post-transcriptional regulation of gene expression. In this study we aimed to identify over-expressed TSC-related miRs potentially amenable for therapeutic targeting. We used non-differentiated glioblastoma spheroid cultures (GSCs) containing TSCs and compared these to xenografts using a NanoString nCounter platform. This revealed 19 over-expressed miRs in the non-differentiated GSCs. Additionally, non-differentiated GSCs were compared to neural stem cells (NSCs) using a microarray platform. This revealed four significantly over-expressed miRs in the non-differentiated GSCs in comparison to the NSCs. The three most over-expressed miRs in the non-differentiated GSCs compared to xenografts were miR-126, -137 and -128. KEGG pathway analysis suggested the main biological function of these over-expressed miRs to be cell-cycle arrest and diminished proliferation. To functionally validate the profiling results suggesting association of these miRs with stem-like properties, experimental over-expression of miR-128 was performed. A consecutive limiting dilution assay confirmed a significantly elevated spheroid formation in the miR-128 over-expressing cells. This may provide potential therapeutic targets for anti-miRs to identify novel treatment options for GBM patients.


Asunto(s)
Neoplasias Encefálicas/metabolismo , Glioblastoma/metabolismo , MicroARNs/metabolismo , Células Madre Neoplásicas/metabolismo , Animales , Neoplasias Encefálicas/patología , Línea Celular Tumoral , Células Cultivadas , Técnica del Anticuerpo Fluorescente , Regulación Neoplásica de la Expresión Génica , Glioblastoma/patología , Xenoinjertos , Humanos , Masculino , Análisis por Micromatrices , Trasplante de Neoplasias , Células-Madre Neurales/metabolismo , Ratas Desnudas , Esferoides Celulares/trasplante
8.
Neurocrit Care ; 22(2): 221-8, 2015 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-25142826

RESUMEN

BACKGROUND: Mortality and morbidity have remained high in bacterial meningitis. Impairment of cerebral energy metabolism probably contributes to unfavorable outcome. Intracerebral microdialysis is routinely used to monitor cerebral energy metabolism, and recent experimental studies indicate that this technique may separate ischemia and non-ischemic mitochondrial dysfunction. The present study is a retrospective interpretation of biochemical data obtained in a series of patients with severe community-acquired meningitis. METHODS: Cerebral energy metabolism was monitored in 15 patients with severe community-acquired meningitis utilizing intracerebral microdialysis and bedside biochemical analysis. According to previous studies, cerebral ischemia was defined as lactate/pyruvate (LP) ratio > 30 with intracerebral pyruvate level < 70 µmol L(-1). Non-ischemic mitochondrial dysfunction was defined as LP-ratio > 30 at a normal or increased interstitial concentration of pyruvate (≥ 70 µmol L(-1)). Patients with LP-ratios < 30 were classified as no mitochondrial dysfunction. RESULTS: The biochemical pattern was in 8 patients (10 microdialysis catheters) classified as no mitochondrial dysfunction, in 5 patients classified as non-ischemic mitochondrial dysfunction, and in 2 patients (3 catheters) classified as ischemia. CONCLUSIONS: In patients with severe community-acquired meningitis, compromised cerebral energy metabolism occurs frequently and was diagnosed in 7 out of 15 cases. A biochemical pattern of non-ischemic mitochondrial dysfunction appears to be a more common underlying condition than cerebral ischemia.


Asunto(s)
Isquemia Encefálica/metabolismo , Metabolismo Energético/fisiología , Ácido Láctico/metabolismo , Meningitis Bacterianas/metabolismo , Enfermedades Mitocondriales/metabolismo , Ácido Pirúvico/metabolismo , Adolescente , Adulto , Anciano , Niño , Preescolar , Transmisión de Enfermedad Infecciosa , Humanos , Lactante , Microdiálisis , Persona de Mediana Edad , Adulto Joven
9.
World Neurosurg X ; 23: 100308, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38584878

RESUMEN

Background: There are no generally accepted criteria for selecting patients with recurrent glioblastoma for surgery. This retrospective study in a Danish population-based cohort aimed to identify prognostic factors affecting postoperative survival after repeated surgery for recurrent glioblastoma and to test if the preoperative New Scale for Recurrent Glioblastoma Surgery (NSGS) developed by Park CK et al could assist in the selection of patients for repeat glioblastoma surgery. Methods: Clinical data from 66 patients with recurrent glioblastoma and repeated surgery were analyzed. Kaplan-Meier plots were produced to illustrate survival in each of the three NSGS prognostic groups, and Cox proportional hazard regression was used to identify prognostic variables. Multivariable analysis was used to identify differences in survival in the three prognostic groups. Results: Six variables significantly affected postoperative survival: preoperative Karnofsky Performance Status (KPS) < 70 (p = 0.002), decreased KPS after second surgery (p = 0.012), ependymal involvement (p = 0.002), tumor volume â‰§ 50 cm3 (p = 0.021), age (p = 0.033) and Ki-67 (p = 0.005). Retrospective application of the criteria previously published by Park CK et al showed that median postoperative survival for the three prognostic groups was 390 days (0 points), 279 days (1 point), and 80 days (2 points), respectively. Conclusion: Several prognostic variables to predict postoperative survival in patients with recurrent glioblastoma were identified and should be considered when selecting patient for repeat surgery. The NSGS scoring system was useful as there were significant differences in postoperative survival between its three prognostic groups.

10.
Neurocrit Care ; 15(3): 585-92, 2011 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-21638119

RESUMEN

BACKGROUND: An experimental swine model (n = 7) simulating an acute subdural hematoma (ASDH) was employed (1) to explore the relation between the brain tissue oxygenation (PbtO(2)) and the regional cerebral energy metabolism as obtained by microdialysis, and (2) to define the lowest level of PbtO(2) compatible with intact energy metabolism. METHODS: ASDH was produced by infusion of 7 ml of autologous blood (infusion rate 0.5 ml/min) by a catheter placed subdurally. PbtO(2) and microdialysis probes were placed symmetrically in the injured ("bad-side") and non-injured ("good-side") hemispheres. Intracranial pressure (ICP) was monitored in the "good-side." RESULTS: ICP, cerebral perfusion pressure (CPP), PbtO(2), glucose, lactate, pyruvate, lactate-pyruvate ratio (LP ratio), glutamate, and glycerol were recorded at baseline (60 min) and post trauma (360 min). After the creation of the ASDH, PbtO(2) decreased significantly in both the hemispheres (P < 0.001). No significant difference was found between the sides post trauma. The LP ratio, glutamate, and glycerol in the "bad-side" increased significantly over the "good-side" where the values remained within the normal limits. A PbtO(2) value below approximately 25 mmHg was found to be associated with disturbed energy metabolism in the "bad-side" but not in the "good-side." No correlation was found between the LP ratio and PbtO(2) in either hemisphere. CONCLUSIONS: PbtO(2) monitoring accurately describes tissue oxygenation but does not disclose whether the oxygen delivery is sufficient for maintaining cerebral energy metabolism. Accordingly, it may not be possible to define a threshold level for PbtO(2) below which energy failure and permanent tissue damage occurs.


Asunto(s)
Isquemia Encefálica/fisiopatología , Metabolismo Energético/fisiología , Hematoma Intracraneal Subdural/fisiopatología , Oxígeno/análisis , Enfermedad Aguda , Animales , Encéfalo/irrigación sanguínea , Encéfalo/fisiopatología , Dominancia Cerebral/fisiología , Femenino , Presión Intracraneal/fisiología , Flujo Sanguíneo Regional/fisiología , Porcinos
11.
Ugeskr Laeger ; 183(20)2021 05 17.
Artículo en Da | MEDLINE | ID: mdl-33998448

RESUMEN

Intraoperative neuromonitoring is a perioperative method, supplementary to stealth navigation and fluorescence microscopic imaging in brain surgery. It allows cortical and subcortical mapping, hence real time identification of eloquent brain areas through electrical stimulation of the cerebral cortex and subcortical areas. The method allows for functional guidance during both awake and asleep neurosurgery and aids in optimizing the extent of resection of the relevant pathology while preserving neurological function as summarised in this review.


Asunto(s)
Mapeo Encefálico , Neoplasias Encefálicas , Encéfalo , Neoplasias Encefálicas/cirugía , Estimulación Eléctrica , Humanos , Imagen por Resonancia Magnética , Procedimientos Neuroquirúrgicos , Vigilia
12.
Ugeskr Laeger ; 182(31)2020 07 27.
Artículo en Da | MEDLINE | ID: mdl-32734870

RESUMEN

In this review, we discuss primary central nervous system lymphomas: a rare type of tumours confined to the central nervous system. The disease is associated with a poor prognosis, which, however, generally has seen steady improvement over the last four decades, particularly in the younger population. Modern surgical techniques are reserved for diagnosis and has no place in the treatment, which mainly relies on high-dose polychemotherapy treatment regimes with methotrexate as the backbone.


Asunto(s)
Neoplasias del Sistema Nervioso Central , Linfoma no Hodgkin , Sistema Nervioso Central , Neoplasias del Sistema Nervioso Central/diagnóstico , Neoplasias del Sistema Nervioso Central/tratamiento farmacológico , Humanos , Metotrexato/uso terapéutico , Pronóstico
13.
Clin Neurol Neurosurg ; 193: 105779, 2020 06.
Artículo en Inglés | MEDLINE | ID: mdl-32200217

RESUMEN

OBJECTIVE: Several risk factors have been shown to be associated with pre- and postoperative seizures in patients undergoing neurosurgical intervention for meningiomas and other primary brain tumors. This study aimed to identify risk factors associated with pre- and postoperative seizures in patients undergoing surgery for brain metastases (BM). PATIENTS AND METHODS: 286 patients who had undergone neurosurgical resection for brain metastases between 2007 and 2015 were included in this single-center retrospective cohort. Seizure incidence and patient characteristics were recorded. Univariate and multivariate logistic regression was performed for both pre- and postoperative seizures. RESULTS: 16.8 % of patients presented with seizures before surgical intervention, and a further 7.7 % of patients developed seizures within 3 months of surgical resection of BM. Patient age, cerebellar location, large tumor size, and headache were negatively correlated with pre-operative seizures, whereas parietal location was positively correlated. Surgery for recurrent tumor was positively correlated with newly developed seizures after surgery. CONCLUSION: Age, cerebellar location, large tumor size, and headache were negatively correlated with development of seizures while parietal location was found to be a risk factor. Lower age and resection of recurrent tumors was correlated with an increased risk of developing postoperative seizures. There was no correlation between type of primary tumor and development of seizures.


Asunto(s)
Neoplasias Encefálicas/secundario , Neoplasias Encefálicas/cirugía , Procedimientos Neuroquirúrgicos/efectos adversos , Complicaciones Posoperatorias/epidemiología , Convulsiones/epidemiología , Convulsiones/etiología , Adulto , Factores de Edad , Anciano , Anciano de 80 o más Años , Neoplasias Encefálicas/patología , Neoplasias Cerebelosas/complicaciones , Neoplasias Cerebelosas/cirugía , Estudios de Cohortes , Dinamarca/epidemiología , Femenino , Cefalea/epidemiología , Cefalea/etiología , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Periodo Preoperatorio
14.
Ugeskr Laeger ; 181(2)2019 Jan 07.
Artículo en Da | MEDLINE | ID: mdl-30618369

RESUMEN

Traditionally, cerebral tumours were operated through a microscope under white light. In recent years, MRI used for peroperative navigation and techniques of colour-visualising the malignant tissue have made resection more precise, radical and safe. However, 5-aminolevulinic acid has been shown to increase neurological deficit due to supramarginal resection. Two widely used substances for tumour-visualisation are 5-aminolevulinic and sodium fluorescein. Both have shown an increased rate of resection compared with white light, but the evidence towards 5-aminolevulinic acid is strongest.


Asunto(s)
Neoplasias Encefálicas/diagnóstico por imagen , Neoplasias Encefálicas/cirugía , Procedimientos Neuroquirúrgicos/métodos , Cirugía Asistida por Computador/métodos , Ácido Aminolevulínico/administración & dosificación , Medios de Contraste/administración & dosificación , Fluorescencia , Humanos , Imagen por Resonancia Magnética
15.
J Neurosurg ; : 1-8, 2019 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-31585425

RESUMEN

OBJECTIVE: Maximal safe resection is an important surgical goal in the treatment for high-grade gliomas. Fluorescent dyes help the surgeon to distinguish malignant tissue from healthy. The aims of this study were 1) to compare the 2 fluorescent dyes 5-aminolevulinic acid (5-ALA) and sodium fluorescein (fluorescein) regarding extent of resection, progression-free survival, and overall survival; and 2) to assess the influence of other risk factors on clinical outcome and screen for potential disadvantages of the dyes. METHODS: A total of 209 patients with high-grade gliomas were included in this retrospective study. Resections were performed in the period from 2012 to 2017 using 5-ALA or fluorescein. Extent of resection was assessed as the difference in tumor volume between early postoperative and preoperative MRI studies. Tumor progression-free survival and overall survival were analyzed using an adjusted Cox proportional hazards model. RESULTS: One hundred fifty-eight patients were operated on with 5-ALA and 51 with fluorescein. The median duration of follow-up was 46.7 and 21.2 months, respectively. Covariables were evenly distributed. There was no statistically significant difference in volumetrically assessed median extent of resection (96.9% for 5-ALA vs 97.4% for fluorescein, p = 0.46) or the percentage of patients with residual tumor volume less than 0.175 cm3 (29.5% for 5-ALA vs 36.2% for fluorescein, p = 0.39). The median overall survival was 14.8 months for the 5-ALA group and 19.7 months for the fluorescein group (p = 0.06). The median adjusted progression-free survival was 8.7 months for the 5-ALA group and 9.2 months for the fluorescein group (p = 0.03). CONCLUSIONS: Fluorescein can be used as a viable alternative to 5-ALA for intraoperative fluorescent guidance in brain tumor surgery. Comparative, prospective, and randomized studies are much needed.

16.
Clin Neurol Neurosurg ; 181: 28-32, 2019 06.
Artículo en Inglés | MEDLINE | ID: mdl-30981151

RESUMEN

OBJECTIVE: The primary objective of this retrospective study was to evaluate the diagnostic yield and morbidity/mortality associated with frameless stereotactic neuronavigated intracranial biopsies with and without the use of fluorescein. PATIENTS AND METHODS: Patient cases from January 2007 to December 2017 were identified using the ICD-10 procedure code AAG00. Relevant clinical data, including histological diagnosis, were collected retrospectively from the electronic patient charts and independently reviewed by two authors. RESULTS: 111 biopsies obtained from 103 patients were identified. Of these, 109 biopsies yielded a diagnosis and resulted in a diagnostic yield of 98.2%. Fluorescein was used in 13 biopsies (11.7%). Twelve patients (10.8%) experienced postoperative complications, and the mortality attributed to the surgery was 1.8%. In 12.6% of cases, the biopsies showed inflammation or nonspecific reactive changes. No statistically significant differences were observed in diagnostic yield or number and severity of complications according to whether intraoperative histological examination was used or not. CONCLUSION: Although direct comparisons between studies are difficult due to lack of consensus about the definition of diagnostic yield, the present study reports a similar diagnostic yield to other studies. Intraoperative histopathological analysis appeared to give little extra benefit.


Asunto(s)
Biopsia , Neoplasias Encefálicas/cirugía , Neuronavegación , Complicaciones Posoperatorias/patología , Adulto , Anciano , Biopsia/métodos , Neoplasias Encefálicas/patología , Femenino , Fluorescencia , Humanos , Masculino , Persona de Mediana Edad , Morbilidad , Neuronavegación/métodos , Complicaciones Posoperatorias/etiología , Técnicas Estereotáxicas
17.
Clin Neurol Neurosurg ; 169: 185-191, 2018 06.
Artículo en Inglés | MEDLINE | ID: mdl-29709882

RESUMEN

OBJECTIVE: To identify risk factors for developing seizures pre- and postoperatively in low- and high-grade gliomas. PATIENTS AND METHODS: 282 patients undergoing neurosurgical tumor resection between 2013-2015 were included in the present single-center retrospective cohort study. Seizure incidences according to various variables were described. Univariate and multivariate logistic regression analyses were performed to identify significant risk factors for both pre- and postoperative seizures. RESULTS: 37.6% of patients presented with seizures before surgery, 18.4% developed seizures in the postoperative course, and 55.0% had no record of seizures pre- or postoperatively. Focal, cognitive, and other symptoms, tumors located in a non-eloquent area, and tumors ≥ 40 mm in diameter were found to be associated with a reduced risk of preoperative seizures, whereas hypertension or no comorbidity posed an increased risk. The presence of seizures pre- or perioperatively (≤ 24 h before and after surgery), and tumors located in the thalamus were associated with an increased risk of seizures in the postoperative course. CONCLUSION: Predictors for pre- and postoperative seizures identified in this study should be taken into account and integrated into the present knowledge, when determining patients at increased risk of developing seizures. Future prospective studies investigating the efficacy of prophylactic antiepileptic therapy in subgroups of glioma patients are needed before applied into clinical practice.


Asunto(s)
Neoplasias Encefálicas/epidemiología , Neoplasias Encefálicas/cirugía , Glioma/epidemiología , Glioma/cirugía , Complicaciones Posoperatorias/epidemiología , Convulsiones/epidemiología , Adulto , Neoplasias Encefálicas/diagnóstico , Estudios de Cohortes , Dinamarca/epidemiología , Femenino , Glioma/diagnóstico , Humanos , Masculino , Persona de Mediana Edad , Análisis Multivariante , Clasificación del Tumor/métodos , Complicaciones Posoperatorias/diagnóstico , Estudios Retrospectivos , Factores de Riesgo , Convulsiones/diagnóstico , Resultado del Tratamiento
18.
Infect Dis (Lond) ; 49(5): 356-364, 2017 May.
Artículo en Inglés | MEDLINE | ID: mdl-28049382

RESUMEN

BACKGROUND: The aim of this study was to evaluate the clinical outcome of patients with severe bacterial meningitis where intracranial pressure (ICP) monitoring has been performed. METHODS: A retrospective observational study including patients admitted 1st. January 2005 to 31st. December 2014. Thirty nine patients age 18-89 years were included. All the patients received intensive care with mechanical ventilation, ICP monitoring, sedation, antibiotics and corticosteroids according to current guidelines. Clinical outcome was defined as death during hospitalization or survival at hospital discharge. RESULTS: The most common pathogen was Streptococcus pneumoniae (26; 67%). Thirteen patients died (33%) and neurologic impairment was noted in twenty two (84.6%) surviving patients. In S. pneumoniae cases patients with adverse outcome were significantly older (p = 0.0024) and immunosuppressed (p = 0.034). Lower mean-cerebral perfusion pressure (CPP) was found to correlate with adverse outcome (p = 0.005). Cerebrospinal fluid (CSF) was drained in fourteen patients. Increased ICP (>20 mmHg) was observed in twenty four patients. No significant correlation was found between measured ICP and head CT scans with signs of elevated ICP. CONCLUSIONS: Patients with severe meningitis should be admitted to intensive care units and evaluated for ICP monitoring regardless of head CT findings.


Asunto(s)
Monitoreo de Drogas/métodos , Cabeza/diagnóstico por imagen , Presión Intracraneal , Meningitis Bacterianas/tratamiento farmacológico , Meningitis Bacterianas/patología , Tomografía Computarizada por Rayos X/métodos , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Análisis de Supervivencia , Resultado del Tratamiento , Adulto Joven
19.
Ugeskr Laeger ; 177(26)2015 Jun 22.
Artículo en Da | MEDLINE | ID: mdl-26550627

RESUMEN

Thrombosis of the cerebral sinuses most often affects younger adults. Headache is a common complaint and can be accom­panied by vomiting and papilloedema. The diagnosis rests on magnetic resonance imaging and the treatment consists of heparin or low-molecular weight heparin followed by vitamin K antagonists for three months or more. In fulminant cases local thrombolysis is administered, while symptomatic treatment for increased intracranial pressure is given. In retrospective analyses this approach has been associated with a good outcome ­ even in cases treated by decompressive craniectomy.


Asunto(s)
Trombosis de los Senos Intracraneales , Adulto , Anticoagulantes/uso terapéutico , Heparina/uso terapéutico , Humanos , Angiografía por Resonancia Magnética , Imagen por Resonancia Magnética , Trombosis de los Senos Intracraneales/diagnóstico , Trombosis de los Senos Intracraneales/diagnóstico por imagen , Trombosis de los Senos Intracraneales/tratamiento farmacológico , Trombosis de los Senos Intracraneales/fisiopatología , Vitamina K/antagonistas & inhibidores , Adulto Joven
20.
J Nucl Med ; 56(10): 1562-8, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26229144

RESUMEN

UNLABELLED: Brain tumor volume assessment is a major challenge. Molecular imaging using PET may be a promising option because it reflects the biologically active cells. We compared the agreement between PET- and histology-derived tumor volumes in an orthotopic glioblastoma rat model with a noninfiltrating (U87MG) and an infiltrating (T87) tumor phenotype using 2 different radiotracers, 2 different image reconstruction algorithms, parametric imaging, and 2 different image segmentation techniques. METHODS: Rats with U87MG- and T87-derived glioblastomas were continuously scanned with PET for 1 h starting immediately after the injection of 11C-methylaminoisobutyric acid (11C-MeAIB). One hour later, 18F-FDG was injected, followed by a 3-h dynamic PET scan. Images were reconstructed using 2-dimensional ordered-subsets expectation maximization and 3-dimensional maximum a posteriori probability (MAP3D) algorithms. In addition, a parametric image, encompassing the entire tumor kinetics in a single image, was calculated on the basis of the 11C-MeAIB images. All reconstructed images were segmented by fixed thresholding of maximum voxel intensity (VImax) and mean background intensity. The agreement between PET- and histology-derived tumor volumes and intra- and interobserver agreement of the PET-derived volumes were evaluated using Bland-Altman plots. RESULTS: By PET, the mean U87MG tumor volume was 35.0 mm3 using 18F-FDG and 34.1 mm3 with 11C-MeAIB, compared with 33.7 mm3 by histology. Corresponding T87 tumor volumes were 122.1 mm3 using 18F-FDG, 118.3 mm3 with 11C-MeAIB, and 125.4 mm3 by histology. None of these volumes were significantly different. The best agreement between PET- and histology-derived U87MG tumor volumes was achieved with 11C-MeAIB, MAP3D reconstruction, and fixed thresholding of VImax. The intra- and interobserver agreement was high using this method. For T87 tumors, the best agreement between PET- and histology-derived volumes was obtained using 18F-FDG, MAP3D reconstruction, and fixed thresholding of mean background intensity. The agreement using 11C-MeAIB, parametric imaging, and fixed thresholding of VImax was slightly inferior, but the intra- and interobserver agreement was clearly superior. CONCLUSION: Estimation of tumor volume by PET of noninfiltrating brain tumors was accurate and reproducible. In contrast, tumor volume estimation by PET of infiltrating brain tumors was difficult and hard to reproduce. On the basis of our results, PET evaluation of highly infiltrating brain tumors should be further developed.


Asunto(s)
Neoplasias Encefálicas/diagnóstico por imagen , Fluorodesoxiglucosa F18 , Glioblastoma/diagnóstico por imagen , Tomografía de Emisión de Positrones/métodos , Radiofármacos , beta-Alanina/análogos & derivados , Animales , Humanos , Inmunohistoquímica , Masculino , Trasplante de Neoplasias , Variaciones Dependientes del Observador , Ratas , Ratas Desnudas
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