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Introduction: The COVID-19 pandemic has had an impact on ischaemic stroke management, with a reported decrease in hospital admissions, and even disruptions in healthcare and increased in-hospital mortality. However, there is a lack of evidence on the impact of the pandemic on functional prognosis. The aim of this study is to analyse the effect of the COVID-19 pandemic on the 3-month functional outcomes of patients hospitalised due to acute ischaemic stroke in Aragon (Spain). Methods: We reviewed the data of all patients admitted due to ischaemic stroke to any hospital in our regional healthcare system between 30 December 2019 and 3 May 2020. We compared modified Rankin Scale scores and mortality at 3 months in patients hospitalised before and after the declaration of a state of emergency due to the COVID-19 pandemic. Results: In total, 318 patients with acute ischaemic stroke met our inclusion criteria. No differences were observed between periods in global or specific characteristics, with the exception of a higher proportion of patients older than 80 years during the first period (42.2% vs 29.0%, P = .028). In the comparative analysis, we found no significant differences in mortality (12.3 vs 7.9, P = .465) or in the proportion of patients with modified Rankin Scale scores ≤ 2 (57.7% vs 57.1%, P = .425) at 3 months. Conclusion: To our knowledge, this is the first study to analyse the impact of COVID-19 pandemic on the 3-month functional outcomes of patients with ischaemic stroke. In our region, there has been no increase in rates of mortality or disability at 3 months in patients admitted due to ischaemic stroke during the pandemic. Resumen: Introducción: La pandemia COVID-19 ha tenido un impacto en el manejo del ictus isquémico, se ha descrito una disminución de los ingresos hospitalarios e incluso una interrupción en la cadena de atención y aumento de la mortalidad intrahospitalaria. Sin embargo, falta evidencia sobre su impacto en el pronóstico funcional. El objetivo de este estudio es analizar el efecto de la pandemia COVID-19 en el pronóstico funcional a tres meses de los pacientes con ictus isquémico agudo hospitalizados en Aragón. Material y métodos: Revisamos los datos de todos los pacientes ingresados por ictus isquémico ​​en todos los hospitales de nuestro sistema sanitario entre el 30 de diciembre de 2019 y el 3 de mayo de 2020. Comparamos su mRS y mortalidad a tres meses de los hospitalizados antes y después de haberse establecido el estado de emergencia secundario a la pandemia COVID-19. Resultados: En total, 318 pacientes con ictus isquémico agudo cumplieron nuestros criterios de inclusión. No hubo diferencias en las características globales y específicas de cada período, excepto por una mayor proporción de pacientes mayores de 80 años de edad durante el período pre-CoV (42,2% vs 29,0%, p = 0,028). En el análisis comparativo, no encontramos una diferencia significativa en la mortalidad (12,3 vs.7,9, p = 0,465) o la proporción de pacientes con mRS ≤2 (57,7% vs 57,1%, p = 0,425) a los tres meses. Conclusión: Hasta donde sabemos, este es el primer estudio que analiza el impacto de la pandemia de COVID-19 en el pronóstico funcional a tres meses de pacientes con ictus isquémico. En nuestra Comunidad Autónoma, no ha habido un incremento en la mortalidad o discapacidad a tres meses de pacientes hospitalizados por ictus isquémico durante el período COVID-19.

Introduction Stroke affects around 15 million people per year, with 10%-–15% occurring in individuals under 50 years old (stroke in young adults). The prevalence of different vascular risk factors and healthcare strategies for stroke management vary worldwide, making the epidemiology and specific characteristics of stroke in each region an important area of research. This study aimed to determine the prevalence of different vascular risk factors and the aetiology and characteristics of ischaemic stroke in young adults in the autonomous community of Aragon, Spain. Methods A cross-sectional, multi-centre study was conducted by the neurology departments of all hospitals in the Aragonese Health Service. We identified all patients aged between 18 and 50 years who were admitted to any of these hospitals with a diagnosis of ischaemic stroke or TIA between January 2005 and December 2015. Data were collected on demographic variables, vascular risk factors, and type of stroke, among other variables. Results During the study period, 786 patients between 18 and 50 years old were admitted with a diagnosis of ischaemic stroke or TIA to any hospital of Aragon, at a mean annual rate of 12.3 per 100 000 population. The median age was 45 years (IQR: 40-−48 years). The most prevalent vascular risk factor was tobacco use, in 404 patients (51.4%). The majority of strokes were of undetermined cause (36.2%), followed by other causes (26.5%). The median NIHSS score was 3.5 (IQR: 2.0-–7.0). In total, 211 patients (26.8%) presented TIA. Fifty-nine per cent of the patients admitted with a diagnosis of ischaemic stroke (10.3%) were treated with fibrinolysis. Conclusions Ischaemic stroke in young adults is not uncommon in Aragon, and is of undetermined aetiology in a considerable number of cases; it is therefore necessary to implement measures to improve study of the condition, to reduce its incidence, and to prevent its recurrence.

A comparison study is presented, which examines the outcome, complications and cost of stereotactic brain biopsy performed with a frameless versus a frame-based method. The technique of frameless stereotactic biopsy has been shown previously, in both laboratory and in vivo studies, to achieve a level of accuracy at least equal to frame-based biopsy. The investigators have validated the technique in a large clinical series. The frameless and frame-based series were concurrent, comprising 76 and 79 cases, respectively. The frameless stereotactic technique involved standard needle biopsy, targeted by an image-guidance system and directed by a novel rigid adjustable instrument-holder. Frame-based biopsies were performed with the CRW and Leksell systems. There were no significant differences in the demographics, lesion site, size and pathologies between the groups. Operating theatre occupancy and anaesthetic time were both significantly shorter for the frameless series than the frame-based series (p < 0.0001). In addition, the complication rate in the frameless biopsy series was significantly lower than in the frame-based series (p = 0.018). This resulted in lower ITU bed occupancy (p = 0.02), shorter mean hospital stay (p = 0.0013) and significant cost savings (p = 0.0022) for the frameless stereotactic biopsy group, despite the greater use of more expensive MRI in these cases. This comparison study demonstrates that the superior imaging, target visualization and flexibility of the technique of frameless stereotactic biopsy translates into tangible advantages for safety, time and cost when compared with the current gold-standard of frame-based biopsy. The principles are discussed and the authors propose a definition for the term 'frameless stereotaxy'.

In the pediatric population, B-acute lymphoblastic leukemia (B-ALL) is the most prevalent childhood hematological malignancy, as well as the leading cause of childhood cancer-related mortality. Advances in cytogenetics utilizing array-based technologies and next-generation sequencing (NGS) techniques have revealed exciting insights into the genetic basis of this disease, with the hopes of developing individualized treatment plans for affected children. In this comprehensive review, we discuss our current understanding of childhood (pediatric) B-ALL and highlight the most recent genetic advances and their therapeutic implications.

Advances in computer technology have permitted virtual reality images of the ventricular system. To determine the relevance of these images we have compared virtual reality simulations of the ventricular system with endoscopic findings in three patients. The virtual fly-through can be simulated after definition of waypoints. Flight objects of interest can be viewed from all sides. Important drawbacks are that filigree structures may be missed and blood vessels cannot be distinguished clearly. However, virtual endoscopy can presently be used as a planning tool or for training and has future potential for neurosurgery.

The purpose of this study was to assess the effect of humidity and packaging materials on the stability of iodine in typical salt samples from countries with tropical and subtropical climates, under controlled climatic conditions. Initially we examined eight samples. In the second phase we expanded the study to salts from 18 sources and attempted to correlate the observed stability with salt impurities naturally present in these samples. High humidity resulted in rapid loss of iodine from salt iodized with potassium iodate, ranging from 30% to 98% of the original iodine content. Solid low-density polyethylene packaging protected the iodine to a great extent. High losses were observed from woven high-density polyethylene bags, which are often the packaging material of choice in tropical countries. Impurities that provided moisture at the salt surface had the most deleterious effect. Although clear correlations were not obtained, the presence of reducing agents, hygroscopic compounds of magnesium, and so forth seemed to have the most adverse effects on the stability of iodine. Surprisingly, carbonates had little effect on stability over the range present in the samples. Packaging salt in low-density polyethylene bags, which provided a good moisture barrier, significantly reduced iodine losses, and in most cases the iodine content remained relatively stable for six months to a year. The findings from this study indicate that iodine can be highly unstable, and in order to ensure the effectiveness of local salt-iodization programmes, countries should determine iodine losses from local iodized salt under local conditions of production, climate, packaging, and storage.

Severe spinal spasticity has been shown to be a good indication for continuous intrathecal baclofen infusion (CIBI), but there is only limited experience with this treatment in patients with supraspinal spasticity. Eighteen patients with severe spasticity from traumatic or hypoxic brain injury were treated with CIBI. In all patients spasticity could be reduced significantly. The mean Ashworth score was reduced from 4.5 to 2.33 and the mean Spasm frequency score from 2.16 to 0.94. This reduction of spasticity led to a marked pain reduction. Nursing, perineal care and mobilization became much easier. The complication rate was low. In this series we saw one infection in the pump pocket, one epileptic seizure after a bolus application of baclofen and one spinal catheter displacement. The results are similar to those reported from series of patients with spinal spasticity and correspond to the limited experience we have so far with supraspinal spasticity patients. To prevent limb contractures CIBI should be performed as soon as the patient is in a stable clinical condition after brain injury. Further prospective clinical trials will be necessary to obtain more experience with patients suffering from supraspinal spasticity.

Today, endoscopic third ventriculostomy is an established operative modality in occlusive hydrocephalus. The elemental step in third ventriculostomy is the perforation of the floor of the third ventricle. Especially with a thickened third ventricular floor, anatomical orientation can be disturbed and perforation of third ventricular floor technically difficult. The combination of a neuronavigation system with an endoscope provides interactive image-guided neuroendoscopy. Exact planning of the approach is thus possible and the ideal trajectory to the target area can be determined. We have combined interactive neuronavigation and intraoperative fluoroscopy for incorporating real-time feedback to optimize endoscopy in patients with a thickened third ventricular floor selected for third ventriculostomy.

The initial clinical experience with a prototype of the EasyGuide Neuro surgical navigation system is presented together with some measurements of intraoperative brain shift taken with the neuro-navigator. The EasyGuide Neuro is an infrared-based system employing hand-held localisers with light-emitting diodes tracked by a table-mounted camera array. Standard orthogonal reformats which intersect at the pointer tip position are displayed by the workstation in near real-time. We have prospectively studied the 31 consecutive patients undergoing surgery with the neuronavigator during the first 3 months of clinical use. General patient data, system accuracy checks and surgical impact are described. In a subgroup of 16 patients measurements of brain shift were taken at the brain surface, at the deepest point of surgery and at the bone surface offset. The latter was used to correct for registration errors. We found a significantly greater shift of the cortical surface than of deep structures (p < 0.02) with this method. These measurements are presented as evidence supporting the validity of navigational guidance in clinical practice.

It is uncertain whether the use of image-guided surgery has an influence on operating time. We prospectively studied the time requirements which have to be invested for using image-guided surgery and performed a comparison of operating room times from 125 matched pairs of image-guided and conventional operations. Our study revealed that neuronavigation has to be regarded as time neutral in general neurosurgery, whereas in stereotactic surgery, namely biopsy retrival, a significant reduction of anaesthetic time can be achieved through the complete separation of imaging and operation in the frameless approach.

Introduccion. La amnesia global transitoria (AGT) es una manifestacion clinica descrita en muchos estudios, pero cuya fisiopatologia no esta aclarada. A las hipotesis clasicas de asociacion con migrana, epilepsia y la mas aceptada de evento isquemico transitorio (AIT), se ha anadido en los ultimos anos la teoria de insuficiencia valvular yugular sin poder establecerse el origen real del cuadro. Pacientes y metodos. Estudio retrospectivo de 131 pacientes diagnosticados de AGT entre 1993 y 2004 comparados con 262 pacientes con AIT diagnosticados durante el mismo periodo. Resultados. Edad media de 65,94 anos en AGT frente a 71,11 anos en AIT. Mayor frecuencia de hipertension arterial entre los pacientes con AGT y de diabetes mellitus en pacientes con AIT (p < 0,05 en ambos casos). Escasa cardiopatia emboligena en pacientes con AGT. Mayor frecuencia de antecedentes de cardiopatia isquemica y de antecedentes y desarrollo de enfermedad cerebrovascular en los pacientes con AIT respecto a la AGT (p < 0,05). Recurrencia de la AGT del 12%. Mayor porcentaje de hallazgos patologicos en la TC cerebral en pacientes con AIT (p < 0,05). No hay diferencias significativas en cuanto al tratamiento al alta entre los pacientes con AGT y AIT. Conclusion. La AGT no parece ser una manifestacion de la patologia arterioesclerotica ni presentar mayor riesgo de enfermedad cardio o cerebrovascular y, por lo tanto, no estaria indicado el tratamiento antiagregante.

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The holopnosencephalies are a rare group of disorders stemming from failure of normal forebrain development and cleavage during early embryologic development [1 -5]. The associated spectrum of intracranial and facial abnormalities has received little attention in the radiological literature [2, 3]. The advent of high-resolution neal-time imaging equipment has allowed detection of the group of holopnosencephalies, but lack of familiarity with uncommon forms may lead to diagnostic confusion. We report the use of sonognaphy in the antenatal diagnosis of an unusual form of holopnosencephaly (semiloban) with hypotelonism in a fetus with multiple congenital anomalies.