| 1. |
- Al Masri, Mohammad, 2001, et al.
(författare)
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The glymphatic system for neurosurgeons: a scoping review
- 2024
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Ingår i: NEUROSURGICAL REVIEW. - 0344-5607 .- 1437-2320. ; 47:1
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Tidskriftsartikel (refereegranskat)abstract
- The discovery of the glymphatic system has revolutionized our understanding of cerebrospinal fluid (CSF) circulation and interstitial waste clearance in the brain. This scoping review aims to synthesize the current literature on the glymphatic system's role in neurosurgical conditions and its potential as a therapeutic target. We conducted a comprehensive search in PubMed and Scopus databases for studies published between January 1, 2012, and October 31, 2023. Studies were selected based on their relevance to neurosurgical conditions and glymphatic function, with both animal and human studies included. Data extraction focused on the methods for quantifying glymphatic function and the main results. A total of 67 articles were included, covering conditions such as idiopathic normal pressure hydrocephalus (iNPH), idiopathic intracranial hypertension (IIH), subarachnoid hemorrhage (SAH), stroke, intracranial tumors, and traumatic brain injury (TBI). Significant glymphatic dysregulation was noted in iNPH and IIH, with evidence of impaired CSF dynamics and delayed clearance. SAH studies indicated glymphatic dysfunction with the potential therapeutic effects of nimodipine and tissue plasminogen activator. In stroke, alterations in glymphatic activity correlated with the extent of edema and neurological recovery. TBI studies highlighted the role of the glymphatic system in post-injury cognitive outcomes. Results indicate that the regulation of aquaporin-4 (AQP4) channels is a critical target for therapeutic intervention. The glymphatic system plays a critical role in the pathophysiology of various neurosurgical conditions, influencing brain edema and CSF dynamics. Targeting the regulation of AQP4 channels presents as a significant therapeutic strategy. Although promising, the translation of these findings into clinical practice requires further human studies. Future research should focus on establishing non-invasive biomarkers for glymphatic function and exploring the long-term effects of glymphatic dysfunction.
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| 2. |
- Bartek, Jiri, Jr., et al.
(författare)
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Scandinavian Multicenter Acute Subdural Hematoma (SMASH) Study : Study Protocol for a Multinational Population-Based Consecutive Cohort
- 2019
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Ingår i: Neurosurgery. - : Ovid Technologies (Wolters Kluwer Health). - 0148-396X .- 1524-4040. ; 84:3, s. 799-803
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUNDTraumatic acute subdural hematomas (ASDHs) are associated with high rate of morbidity and mortality, especially in elderly individuals. However, recent reports indicate that the morbidity and mortality rates might have improved.OBJECTIVETo evaluate postoperative (30-d) mortality in younger vs elderly (70 yr) patients with ASDH. Comparing younger and elderly patients, the secondary objectives are morbidity patterns of care and 6 mo outcome according to Glasgow outcome scale (GOS). Finally, in patients with traumatic ASDH, we aim to provide prognostic variables.METHODS This is a large-scale population-based Scandinavian study including all neurosurgical departments in Denmark and Sweden. All adult (18 yr) patients surgically treated between 2010 and 2014 for a traumatic ASDH in Denmark and Sweden will be included. Identification at clinicaltrials.gov is NCT03284190.EXPECTED OUTCOMESWe expect to provide data on potential differences between younger vs elderly patients in terms of mortality and morbidity. We hypothesize that elderly patients selected for surgery have a similar pattern of care as compared with younger patients. We will provide functional outcome in terms of GOS at 6 mo in younger vs elderly patients undergoing ASDH evacuation. Finally, clinical useful prognostic factors for favorable (GOS 4-5) vs unfavorable (GOS 1-3) will be identified.DISCUSSION An improved understanding of the clinical outcome, treatment and resource allocation, clinical course, and the prognostic factors of traumatic ASDH will allow neurosurgeons to make better treatment decisions.
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| 3. |
- Carstam, Louise, et al.
(författare)
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Neurosurgical patterns of care for diffuse low-grade gliomas in Sweden between 2005 and 2015
- 2018
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Ingår i: Neuro-Oncology Practice. - : Oxford University Press. - 2054-2577 .- 2054-2585. ; 6:2, s. 124-133
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Tidskriftsartikel (refereegranskat)abstract
- Background: In the last decade, increasing evidence has evolved for early and maximal safe resection of diffuse low-grade gliomas (LGGs) regarding survival. However, changes in clinical practice are known to occur slowly and we do not know if the scientific evidence has yet resulted in changes in neurosurgical patterns of care.Methods: The Swedish Brain Tumor Registry was used to identify all patients with a first-time histopathological diagnosis of LGG between 2005 and 2015. For analysis of surgical treatment patterns, we subdivided assessed time periods into 2005-2008, 2009-2012, and 2013-2015. Population-based data on patient and disease characteristics, surgical management, and outcomes were extracted.Results: A total of 548 patients with diffuse World Health Organization grade II gliomas were identified: 142 diagnosed during 2005-2008, 244 during 2009-2012, and 162 during 2013-2015. Resection as opposed to biopsy was performed in 64.3% during 2005-2008, 74.2% during 2009-2012, and 74.1% during 2013-2015 (P = .08). There was no difference among the 3 periods regarding overall survival (P = .11). However, post hoc analysis of data from the 4 (out of 6) centers that covered all 3 time periods demonstrated a resection rate of 64.3% during 2005-2008, 77.4% during 2009-2012, and 75.4% during 2013-2015 (P = .02) and longer survival of patients diagnosed 2009 and onward (P = .04).Conclusion: In this nationwide, population-based study we observed a shift over time in favor of LGG resection. Further, a positive correlation between the more active surgical strategy and longer survival is shown, although no causality can be claimed because of possible confounding factors.
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| 4. |
- Carstam, Louise, et al.
(författare)
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WHO Grade Loses Its Prognostic Value in Molecularly Defined Diffuse Lower-Grade Gliomas.
- 2021
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Ingår i: Frontiers in Oncology. - : Frontiers Media S.A.. - 2234-943X. ; 11
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Tidskriftsartikel (refereegranskat)abstract
- Background: While molecular insights to diffuse lower-grade glioma (dLGG) have improved the basis for prognostication, most established clinical prognostic factors come from the pre-molecular era. For instance, WHO grade as a predictor for survival in dLGG with isocitrate dehydrogenase (IDH) mutation has recently been questioned. We studied the prognostic role of WHO grade in molecularly defined subgroups and evaluated earlier used prognostic factors in the current molecular setting.Material and Methods: A total of 253 adults with morphological dLGG, consecutively included between 2007 and 2018, were assessed. IDH mutations, codeletion of chromosomal arms 1p/19q, and cyclin-dependent kinase inhibitor 2A/B (CDKN2A/B) deletions were analyzed.Results: There was no survival benefit for patients with WHO grade 2 over grade 3 IDH-mut dLGG after exclusion of tumors with known CDKN2A/B homozygous deletion (n=157) (log-rank p=0.97). This was true also after stratification for oncological postoperative treatment and when astrocytomas and oligodendrogliomas were analyzed separately. In IDH-mut astrocytomas, residual tumor volume after surgery was an independent prognostic factor for survival (HR 1.02; 95% CI 1.01-1.03; p=0.003), but not in oligodendrogliomas (HR 1.02; 95% CI 1.00-1.03; p=0.15). Preoperative tumor size was an independent predictor in both astrocytomas (HR 1.03; 95% CI 1.00-1.05; p=0.02) and oligodendrogliomas (HR 1.05; 95% CI 1.01-1.09; p=0.01). Age was not a significant prognostic factor in multivariable analyses (astrocytomas p=0.64, oligodendrogliomas p=0.08).Conclusion: Our findings suggest that WHO grade is not a robust prognostic factor in molecularly well-defined dLGG. Preoperative tumor size remained a prognostic factor in both IDH-mut astrocytomas and oligodendrogliomas in our cohort, whereas residual tumor volume predicted prognosis in IDH-mut astrocytomas only. The age cutoffs for determining high risk in patients with IDH-mut dLGG from the pre-molecular era are not supported by our results.
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| 5. |
- Corell, Alba, et al.
(författare)
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Age and surgical outcome of low-grade glioma in Sweden.
- 2018
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Ingår i: Acta neurologica Scandinavica. - : Hindawi Limited. - 1600-0404 .- 0001-6314. ; 138:4, s. 359-368
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Tidskriftsartikel (refereegranskat)abstract
- Low-grade gliomas (LGG) are slow-growing primary brain tumors that typically affect young adults. Advanced age is widely recognized as a poor prognostic factor in LGG. The impact of age on postoperative outcome in this patient group has not been systemically studied.We performed a nationwide register-based study with data from the Swedish Brain Tumor Registry (SBTR) for all adults diagnosed with a supratentorial LGG (WHO grade II astrocytoma, oligoastrocytoma, or oligodendroglioma) during 2005-2015. Patient- and tumor-related characteristics, postoperative complications, and survival were compared between three different age groups (18-39years, 40-59years, and ≥60years).We identified 548 patients; 204 patients (37.2%) aged 18-39years, 227 patients (41.4%) aged 40-59years, and 117 patients (21.4%) ≥60years of age. Unfavorable preoperative prognostic factors (eg, functional status and neurological deficit) were more common with increased age (P<.001). In addition, overall survival was significantly impaired in those 60years and above (P<.001). We observed a clear dose-response for age with separation of survival curves at 50years. Biopsy was more common in patients ≥60years (P<.001). Subgroup analysis of patients with resection revealed a higher amount of postoperative neurological deficits in older patients (P=.029).In general, older patients with LGG have several unfavorable prognostic factors compared with younger patients but seem to tolerate surgery in a comparable fashion. However, more neurological deficits were observed following resections in elderly. Our data further support a cutoff at 50years rather than 40years for selection of high-risk patients.
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| 6. |
- Corell, Alba, et al.
(författare)
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Intracranial Manifestation of Melioidosis: A Case Report and Long-Term Follow-Up
- 2020
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Ingår i: Cureus. - : Cureus, Inc.. - 2168-8184. ; 12:12
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Tidskriftsartikel (refereegranskat)abstract
- Primary neurological melioidosis is rare with fewer than 50 cases reported world-wide. We report the first documented case of primary neurological melioidosis in Sweden, a 32-year old male who previously lived in Thailand for six years and recently moved to Sweden. He presented with headache, irritability and lack of concentration. Investigation with computerized tomography (CT) and subsequent magnetic resonance imaging (MRI) showed epidural fluid that was interpreted as a chronic epidural hematoma. He underwent surgical evacuation of the epidural collection that was found to be a white collection mixed with pus and bacterial culture results were positive for Burkholderia pseudomallei.
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| 7. |
- Corell, Alba, et al.
(författare)
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Neurosurgical treatment and outcome patterns of meningioma in Sweden: a nationwide registry-based study.
- 2019
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Ingår i: Acta neurochirurgica. - : Springer Science and Business Media LLC. - 0942-0940 .- 0001-6268. ; 161:2, s. 333-341
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Tidskriftsartikel (refereegranskat)abstract
- Surgery is the main treatment modality for intracranial meningiomas, but data on short-term surgical outcome are limited. The aim of this Swedish nationwide registry-based study was to benchmark the 30-day complication rate in a cohort of meningioma patients using data from the Swedish brain tumor registry (SBTR). Furthermore, we investigated outcomes for asymptomatic patients.Data were collected from the SBTR for all adults with histopathologically verified intracranial meningioma between 2009 and 2015. Patient symptoms, tumor characteristics, and complications within 30days postoperatively were analyzed.In total, 2324 patients, with a mean age of 58.7years (SD 13.5), underwent surgery for intracranial meningioma and 14.1% of the patients were asymptomatic before the intervention. The most common symptom prior to treatment was focal deficit, which occurred in 1450 patients (62.4%). Moreover, within 30days after surgery, 344 patients (14.8%) developed new neurological deficits and new-onset seizures occurred in 105 patients (4.5%), while 8.3% of asymptomatic patients developed neurological deficit and 3.7% new-onset seizures. Due to complications, reoperations were performed in 120 patients (5.2%). The postoperative 30-day mortality in the whole cohort was 1.5%.This study benchmarks the 30-day complication rate after meningioma surgery and provides outcome data in the highly relevant group of asymptomatic patients using data from the Swedish brain tumor registry. Since surgical decision-making is a careful consideration of short-term risk versus long-term benefit, this information may be useful for both caregivers and patients.
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| 8. |
- Corell, Alba, et al.
(författare)
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[Paroxysmal sympathetic hyperactivity]. : ABC om Paroxysmal sympatisk hyperaktivitet.
- 2021
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Ingår i: Lakartidningen. - 1652-7518. ; 118
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Tidskriftsartikel (refereegranskat)abstract
- Paroxysmal sympathetic hyperactivity (PSH) is a condition mainly described in patients after traumatic brain injury and it is also known under the terms "autonomic storm" and "dysautonomia". It affects between 8-10% of patients after traumatic brain injury and can also affect patients after other neurological diseases, such as anoxic brain injury, stroke, tumors or infections. PSH manifests with six main symptoms: tachycardia, tachypnea, hypertension, hyperthermia, hyperhidrosis and increased muscle tonus. It is of outmost importance to exclude other causes for the symptoms and there are diagnostic criteria established to identify and diagnose PSH. The treatment is pharmacological and non-pharmacological and often multimodal. PSH is probably underdiagnosed and increased awareness is needed.
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| 9. |
- Corell, Alba
(författare)
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Population-based studies of brain tumor surgery: surgical outcome and prognostic factors
- 2020
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Neurosurgery is the cornerstone in the treatment of a majority of brain tumors. Surgery can sometimes cure or delay tumor progression. However, surgery is associated with risks, and adequate information about the anticipated peri- and postoperative course is important for informed consent. The identification of tumor markers in a preoperative setting is beneficial in lower-grade gliomas, a heterogeneous group in terms of biological behavior where molecular markers play an important role in diagnosis and treatment. We investigated the role of the non-invasive radiological marker T2-FLAIR mismatch by means of a population-based study. The mismatch sign is highly specific for IDH-mutated 1p/19q non-codeleted gliomas and thus useful in the preoperative setting. We examined how age affects lower-grade glioma treatment, in addition to short-term postoperative complications. Older patients (≥60 years) seem to tolerate neurosurgery compared with younger patients (<60 years), although a higher rate of neurological deficit occurred postoperatively. Meningioma is the most common intracranial tumor and surgery is the main treatment modality. The short-term postoperative risk for complications after meningioma surgery, both in symptomatic and asymptomatic, was studied. The complication rate in the short-term (30-day) postoperative period in Sweden lies in line with the relevant literature. Through a registry-based approach we studied the return to work long-term (up to two years) after meningioma surgery. The sick leave pattern after meningioma surgery revealed that surgery is associated with considerable risk of long-term sick leave two years after the operation as 57% in meningioma patients returned to work compared with 84% of matched controls. Risk factors for long-term sick leave were history of depression, surgical neurological deficit and higher tumor grade. The present work contributes with elucidating on a promising non-invasive radiological marker and the role of age in lower-grade gliomas, and in patients with meningioma data on the current postoperative risk after meningioma surgery and novel data with regard to return to work.
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| 10. |
- Corell, Alba, et al.
(författare)
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Shared decision-making in neurosurgery: a scoping review.
- 2021
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Ingår i: Acta neurochirurgica. - : Springer Science and Business Media LLC. - 0942-0940 .- 0001-6268. ; 163, s. 2371-2382
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Forskningsöversikt (refereegranskat)abstract
- In modern neurosurgery, there are often several treatment alternatives, with different risks and benefits. Shared decision-making (SDM) has gained interest during the last decade, although SDM in the neurosurgical field is not widely studied. Therefore, the aim of this scoping review was to present the current landscape of SDM in neurosurgery.A literature review was carried out in PubMed and Scopus. We used a search strategy based on keywords used in existing literature on SDM in neurosurgery. Full-text, peer-reviewed articles published from 2000 up to the search date February 16, 2021, with patients 18years and older were included if articles evaluated SDM in neurosurgery from the patient's perspective.We identified 22 articles whereof 7 covered vestibular schwannomas, 7 covered spinal surgery, and 4 covered gliomas. The other topics were brain metastases, benign brain lesions, Parkinson's disease and evaluation of neurosurgical care. Different methods were used, with majority using forms, questionnaires, or interviews. Effects of SDM interventions were studied in 6 articles; the remaining articles explored factors influencing patients' decisions or discussed SDM aids.SDM is a tool to involve patients in the decision-making process and considers patients' preferences and what the patients find important. This scoping review illustrates the relative lack of SDM in the neurosurgical literature. Even though results indicate potential benefit of SDM, the extent of influence on treatment, outcome, and patient's satisfaction is still unknown. Finally, the use of decision aids may be a meaningful contribution to the SDM process.
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