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JAMA Neurology Mar 2021Spontaneous intracranial hypotension (SIH) is a highly disabling but often misdiagnosed disorder. The best management options for patients with SIH are still uncertain. (Meta-Analysis)
Meta-Analysis
IMPORTANCE
Spontaneous intracranial hypotension (SIH) is a highly disabling but often misdiagnosed disorder. The best management options for patients with SIH are still uncertain.
OBJECTIVE
To provide an objective summary of the available evidence on the clinical presentation, investigations findings, and treatment outcomes for SIH.
DATA SOURCES
Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) reporting guideline-compliant systematic review and meta-analysis of the literature on SIH. Three databases were searched from inception to April 30, 2020: PubMed/MEDLINE, Embase, and Cochrane. The following search terms were used in each database: spontaneous intracranial hypotension, low CSF syndrome, low CSF pressure syndrome, low CSF volume syndrome, intracranial hypotension, low CSF pressure, low CSF volume, CSF hypovolemia, CSF hypovolaemia, spontaneous spinal CSF leak, spinal CSF leak, and CSF leak syndrome.
STUDY SELECTION
Original studies in English language reporting 10 or more patients with SIH were selected by consensus.
DATA EXTRACTION AND SYNTHESIS
Data on clinical presentation, investigations findings, and treatment outcomes were collected and summarized by multiple observers. Random-effect meta-analyses were used to calculate pooled estimates of means and proportions.
MAIN OUTCOMES AND MEASURES
The predetermined main outcomes were the pooled estimate proportions of symptoms of SIH, imaging findings (brain and spinal imaging), and treatment outcomes (conservative, epidural blood patches, and surgical).
RESULTS
Of 6878 articles, 144 met the selection criteria and reported on average 53 patients with SIH each (range, 10-568 patients). The most common symptoms were orthostatic headache (92% [95% CI, 87%-96%]), nausea (54% [95% CI, 46%-62%]), and neck pain/stiffness (43% [95% CI, 32%-53%]). Brain magnetic resonance imaging was the most sensitive investigation, with diffuse pachymeningeal enhancement identified in 73% (95% CI, 67%-80%) of patients. Brain magnetic resonance imaging findings were normal in 19% (95% CI, 13%-24%) of patients. Spinal neuroimaging identified extradural cerebrospinal fluid in 48% to 76% of patients. Digital subtraction myelography and magnetic resonance myelography with intrathecal gadolinium had high sensitivity in identifying the exact leak site. Lumbar puncture opening pressures were low, normal (60-200 mm H2O), and high in 67% (95% CI, 54%-80%), 32% (95% CI, 20%-44%), and 3% (95% CI, 1%-6%), respectively. Conservative treatment was effective in 28% (95% CI, 18%-37%) of patients and a single epidural blood patch was successful in 64% (95% CI, 56%-72%). Large epidural blood patches (>20 mL) had better success rates than small epidural blood patches (77% [95% CI, 63%-91%] and 66% [95% CI, 55%-77%], respectively).
CONCLUSIONS AND RELEVANCE
Spontaneous intracranial hypotension should not be excluded on the basis of a nonorthostatic headache, normal neuroimaging findings, or normal lumbar puncture opening pressure. Despite the heterogeneous nature of the studies available in the literature and the lack of controlled interventional studies, this systematic review offers a comprehensive and objective summary of the evidence on SIH that could be useful in guiding clinical practice and future research.
Topics: Blood Patch, Epidural; Conservative Treatment; Humans; Intracranial Hypotension; Magnetic Resonance Imaging; Treatment Outcome
PubMed: 33393980
DOI: 10.1001/jamaneurol.2020.4799 -
Journal of Neurology, Neurosurgery, and... Oct 2023We aimed to create a multidisciplinary consensus clinical guideline for best practice in the diagnosis, investigation and management of spontaneous intracranial...
BACKGROUND
We aimed to create a multidisciplinary consensus clinical guideline for best practice in the diagnosis, investigation and management of spontaneous intracranial hypotension (SIH) due to cerebrospinal fluid leak based on current evidence and consensus from a multidisciplinary specialist interest group (SIG).
METHODS
A 29-member SIG was established, with members from neurology, neuroradiology, anaesthetics, neurosurgery and patient representatives. The scope and purpose of the guideline were agreed by the SIG by consensus. The SIG then developed guideline statements for a series of question topics using a modified Delphi process. This process was supported by a systematic literature review, surveys of patients and healthcare professionals and review by several international experts on SIH.
RESULTS
SIH and its differential diagnoses should be considered in any patient presenting with orthostatic headache. First-line imaging should be MRI of the brain with contrast and the whole spine. First-line treatment is non-targeted epidural blood patch (EBP), which should be performed as early as possible. We provide criteria for performing myelography depending on the spine MRI result and response to EBP, and we outline principles of treatments. Recommendations for conservative management, symptomatic treatment of headache and management of complications of SIH are also provided.
CONCLUSIONS
This multidisciplinary consensus clinical guideline has the potential to increase awareness of SIH among healthcare professionals, produce greater consistency in care, improve diagnostic accuracy, promote effective investigations and treatments and reduce disability attributable to SIH.
Topics: Humans; Intracranial Hypotension; Cerebrospinal Fluid Leak; Magnetic Resonance Imaging; Headache; Diagnosis, Differential
PubMed: 37147116
DOI: 10.1136/jnnp-2023-331166 -
Chiropractic & Manual Therapies 2018We aim to summarize the available evidence on the diagnostic accuracy of imaging (index test) compared to surgery (reference test) for identifying lumbar disc herniation...
MAIN TEXT
We aim to summarize the available evidence on the diagnostic accuracy of imaging (index test) compared to surgery (reference test) for identifying lumbar disc herniation (LDH) in adult patients.For this systematic review we searched MEDLINE, EMBASE and CINAHL (June 2017) for studies that assessed the diagnostic accuracy of imaging for LDH in adult patients with low back pain and surgery as the reference standard. Two review authors independently selected studies, extracted data and assessed risk of bias. We calculated summary estimates of sensitivity and specificity using bivariate analysis, generated linked ROC plots in case of direct comparison of diagnostic imaging tests and assessed the quality of evidence using the GRADE-approach.We found 14 studies, all but one done before 1995, including 940 patients. Nine studies investigated Computed Tomography (CT), eight myelography and six Magnetic Resonance Imaging (MRI). The prior probability of LDH varied from 48.6 to 98.7%. The summary estimates for MRI and myelography were comparable with CT (sensitivity: 81.3% (95%CI 72.3-87.7%) and specificity: 77.1% (95%CI 61.9-87.5%)). The quality of evidence was moderate to very low.
CONCLUSIONS
The diagnostic accuracy of CT, myelography and MRI of today is unknown, as we found no studies evaluating today's more advanced imaging techniques. Concerning the older techniques we found moderate diagnostic accuracy for all CT, myelography and MRI, indicating a large proportion of false positives and negatives.
Topics: Humans; Intervertebral Disc Displacement; Low Back Pain; Lumbosacral Region; Magnetic Resonance Imaging; Myelography; Randomized Controlled Trials as Topic; Sciatica; Tomography Scanners, X-Ray Computed
PubMed: 30151119
DOI: 10.1186/s12998-018-0207-x -
Child's Nervous System : ChNS :... Jul 2022Perinatal brachial plexus palsy (PBPP) has a wide spectrum of clinical symptoms that can range from incomplete paresis of the affected extremity to flaccid arm... (Review)
Review
PURPOSE
Perinatal brachial plexus palsy (PBPP) has a wide spectrum of clinical symptoms that can range from incomplete paresis of the affected extremity to flaccid arm paralysis. Although there is a high rate of spontaneous recovery within the first two years of life, it remains challenging to determine which patients will benefit most from surgical intervention. The diagnostic and predictive use of various imaging modalities has been described in the literature, but there is little consensus on approach or algorithm. The anatomic, pathophysiological, and neurodevelopmental characteristics of the neonatal and infant patient population affected by PBPP necessitate thoughtful consideration prior to selecting an imaging modality.
METHODS
A systematic review was conducted using six databases. Two reviewers independently screened articles published through October 2021.
RESULTS
Literature search produced 10,329 publications, and 22 articles were included in the final analysis. These studies included 479 patients. Mean age at time of imaging ranged from 2.1 to 12.8 months and investigated imaging modalities included MRI (18 studies), ultrasound (4 studies), CT myelography (4 studies), and X-ray myelography (1 study). Imaging outcomes were compared against surgical findings (16 studies) or clinical examination (6 studies), and 87.5% of patients underwent surgery.
CONCLUSION
This systematic review addresses the relative strengths and challenges of common radiologic imaging options. MRI is the most sensitive and specific for identifying preganglionic nerve injuries such as pseudomeningoceles and rootlet avulsion, the latter of which has the poorest prognosis in this patient population and often dictates the need for surgical intervention.
Topics: Brachial Plexus; Brachial Plexus Neuropathies; Humans; Infant; Infant, Newborn; Myelography; Paralysis; Sensitivity and Specificity
PubMed: 35536348
DOI: 10.1007/s00381-022-05538-z -
Frontiers in Surgery 2022To systematically review the clinical value of three imaging examinations (Magnetic Resonance Imaging, Computed Tomography, and myelography) in the diagnosis of Lumbar... (Review)
Review
PURPOSE
To systematically review the clinical value of three imaging examinations (Magnetic Resonance Imaging, Computed Tomography, and myelography) in the diagnosis of Lumbar Disc Herniation.
METHODS
Databases including PubMed, Embase, The Cochrane Library, Web of Science, CBM, CNKI, WanFang Data, and VIP were electronically searched to collect relevant studies on three imaging examinations in the diagnosis of Lumbar Disc Herniation from inception to July 1, 2021. Two reviewers using the Quality Assessment of Diagnostic Accuracy Studies-2 tool independently screened the literature, extracted the data, and assessed the risk of bias of included studies. Then, meta-analysis was performed by using Meta-DiSc 1.4 software and Stata 15.0 software.
RESULTS
A total of 38 studies from 19 articles were included, involving 1,875 patients. The results showed that the pooled Sensitivity, pooled Specificity, pooled Positive Likelihood Ratio, pooled Negative Likelihood Ratio, pooled Diagnostic Odds Ratio, Area Under the Curve of Summary Receiver Operating Characteristic, and Q* were 0.89 (95%CI: 0.87-0.91), 0.83 (95%CI: 0.78-0.87), 4.57 (95%CI: 2.95-7.08), 0.14 (95%CI: 0.09-0.22), 39.80 (95%CI: 18.35-86.32), 0.934, and 0.870, respectively, for Magnetic Resonance Imaging. The pooled Sensitivity, pooled Specificity, pooled Positive Likelihood Ratio, pooled Negative Likelihood Ratio, pooled Diagnostic Odds Ratio, Area Under the Curve of Summary Receiver Operating Characteristic, and Q* were 0.82 (95%CI: 0.79-0.85), 0.78 (95%CI: 0.73-0.82), 3.54 (95%CI: 2.86-4.39), 0.19 (95%CI: 0.12-0.30), 20.47 (95%CI: 10.31-40.65), 0.835, and 0.792, respectively, for Computed Tomography. The pooled Sensitivity, pooled Specificity, pooled Positive Likelihood Ratio, pooled Negative Likelihood Ratio, pooled Diagnostic Odds Ratio, Area Under the Curve of Summary Receiver Operating Characteristic, and Q* were 0.79 (95%CI: 0.75-0.82), 0.75 (95%CI: 0.70-0.80), 2.94 (95%CI: 2.43-3.56), 0.29 (95%CI: 0.21-0.42), 9.59 (95%CI: 7.05-13.04), 0.834, and 0.767 respectively, for myelography.
CONCLUSION
Three imaging examinations had high diagnostic value. In addition, compared with myelography, Magnetic Resonance Imaging had a higher diagnostic value.
PubMed: 36704505
DOI: 10.3389/fsurg.2022.1020766 -
European Radiology Nov 2022To investigate the pooled diagnostic yield of MR myelography in patients with newly diagnosed spontaneous intracranial hypotension (SIH). (Meta-Analysis)
Meta-Analysis
OBJECTIVES
To investigate the pooled diagnostic yield of MR myelography in patients with newly diagnosed spontaneous intracranial hypotension (SIH).
METHODS
A literature search of the MEDLINE/PubMed and Embase databases was conducted until July 25, 2021, including studies with the following inclusion criteria: (a) population: patients with newly diagnosed SIH; (b) diagnostic modality: MR myelography or MR myelography with intrathecal gadolinium for evaluation of CSF leakage; (c) outcomes: diagnostic yield of MR myelography or MR myelography with intrathecal gadolinium. The risk of bias was evaluated using the Quality Assessment of Diagnostic Accuracy Studies-2 tool. DerSimonian-Laird random-effects modeling was used to calculate the pooled estimates. Subgroup analysis regarding epidural fluid collection and meta-regression were additionally performed.
RESULTS
Fifteen studies with 643 patients were included. Eight studies used MR myelography with intrathecal gadolinium, and 11 used MR myelography. The overall quality of the included studies was moderate. The pooled diagnostic yield of MR myelography was 86% (95% CI, 80-91%) and that of MR myelography with intrathecal gadolinium was 83% (95% CI, 51-96%). There was no significant difference in pooled diagnostic yield between MR myelography and MR myelography with intrathecal gadolinium (p = 0.512). In subgroup analysis, the pooled diagnostic yield of the epidural fluid collection was 91% (95% CI, 84-94%). In meta-regression, the diagnostic yield was unaffected regardless of consecutive enrollment, magnet strength, or 2D/3D.
CONCLUSIONS
MR myelography had a high diagnostic yield in patients with SIH. MR myelography is non-invasive and not inferior to MR myelography with intrathecal gadolinium.
KEY POINTS
• The pooled diagnostic yield of MR myelography was 86% (95% CI, 80-91%) in patients with spontaneous intracranial hypotension. • There was no significant difference in pooled diagnostic yield between MR myelography and MR myelography with intrathecal gadolinium. • MR myelography is non-invasive and not inferior to MR myelography with intrathecal gadolinium.
Topics: Humans; Myelography; Intracranial Hypotension; Gadolinium; Magnetic Resonance Imaging; Cerebrospinal Fluid Leak
PubMed: 35538263
DOI: 10.1007/s00330-022-08845-w -
Journal of Clinical Neuroscience :... Mar 2023Superficial siderosis (SS) is a disabling neurodegenerative condition that may be caused by spinal dural defects. Surgical repair is increasingly performed, however... (Review)
Review
OBJECTIVE
Superficial siderosis (SS) is a disabling neurodegenerative condition that may be caused by spinal dural defects. Surgical repair is increasingly performed, however clinical outcomes remain unclear.
METHODS
A systematic search of PubMed, MEDLINE, and EMBASE was conducted (inception to February 2020). Studies reporting cases of (i) superficial siderosis, (ii) spinal dural defect, (iii) and surgical closure of the defect were included. Demographic characteristics, clinical presentation, operative technique and clinical outcome were extracted for patient-level analysis.
RESULTS
A total of 26 publications were included, which reported 38 patients with a median age of 58 years, and a male predominance (78.9 %). Ataxia (85.7 %) and hearing loss (80.0 %) were the most common presenting symptoms. The causative dural defect was most commonly ventral in location (91.7 %) and most commonly identified by CT myelography (48.6 %). Operative technique was highly variable and included primary suture, fibrin glue, dural substitute, or tissue (fat or muscle) graft. Clinical improvement was reported in 21 %, with stabilisation of symptoms in the majority (66 %) and clinical deterioration in 13.2 %. Surgical complications were observed in 7.9 %.
CONCLUSION
In patients with superficial siderosis and spinal dural defect, operative closure leads to improvement or stabilisation of symptoms in the vast majority (87%) of patients.
Topics: Humans; Male; Middle Aged; Female; Siderosis; Myelography; Neurosurgical Procedures; Ataxia
PubMed: 36731382
DOI: 10.1016/j.jocn.2023.01.011 -
Cerebrospinal Fluid-Venous Fistulas: A Systematic Review and Examination of Individual Patient Data.Neurosurgery Apr 2021Spontaneous intracranial hypotension (SIH) is usually caused by a spinal cerebrospinal fluid (CSF) leak. CSF-venous fistula is an underdiagnosed cause of spinal CSF... (Meta-Analysis)
Meta-Analysis
BACKGROUND
Spontaneous intracranial hypotension (SIH) is usually caused by a spinal cerebrospinal fluid (CSF) leak. CSF-venous fistula is an underdiagnosed cause of spinal CSF leak, as it is challenging to identify on myelography.
OBJECTIVE
To review existing literature to summarize common presentations, diagnostic imaging modalities, and current treatment strategies for CSF-venous fistulas.
METHODS
We conducted a systematic review using PubMed, Embase, Scopus, and Web of Science databases to identify studies discussing CSF-venous fistulas. Titles and abstracts were screened. Studies meeting prespecified inclusion criteria were reviewed in full.
RESULTS
Of 180 articles identified, 16 articles met inclusion criteria. Individual patient data was acquired from 7 studies reporting on 18 patients. CSF-venous fistula most frequently presented as positional headache. Digital subtraction myelography provided greatest detection of CSF-venous fistula in the lateral decubitus position and detected CSF-venous fistula in all individual patient cases. Dynamic computed tomography (CT) myelogram enabled detection and differentiation of CSF-venous fistulas from low-flow epidural leaks. The majority of fistulas were in the thoracic spine and slightly more common on the right. Epidural blood patch (EBP) provided temporary or no relief in all individual patients. Resolution or improvement of clinical symptoms and radiologic normalization were observed in all surgically treated patients.
CONCLUSION
Although rare, CSF-venous fistula is an important cause of spinal CSF leak contributing to SIH. Dynamic CT myelogram and digital subtraction myelography, particularly in the lateral decubitus position, are the most accurate and effective diagnostic imaging modalities. EBPs often provide only transient relief, while surgical management is preferred.
Topics: Cerebrospinal Fluid Leak; Fistula; Humans; Intracranial Hypotension; Myelography; Tomography, X-Ray Computed
PubMed: 33438744
DOI: 10.1093/neuros/nyaa558 -
Anticancer Research Apr 2022Intradural cauda equina metastases (ICEM) are rare tumors that reduce functional status. Surgery and radiation are feasible and effective treatments but may have... (Review)
Review
BACKGROUND/AIM
Intradural cauda equina metastases (ICEM) are rare tumors that reduce functional status. Surgery and radiation are feasible and effective treatments but may have debilitating complications. We systematically reviewed the literature on ICEMs.
MATERIALS AND METHODS
PubMed, Scopus, Web of Science, and Cochrane were searched for studies reporting clinical data of patients with ICEMs. Clinical characteristics, management strategies, and treatment outcomes were analyzed.
RESULTS
We included 40 studies comprising 123 patients. Median age was 57 years. The most frequent primary tumors were lung (18.7%), breast (13%), and renal carcinomas (11.4%). Median time from primary tumor diagnosis to ICEMs' presentation was 36 months. The most common presenting symptoms were lower back pain (74%) and motor deficits (62.6%), with acute cauda equina syndrome documented in 36 patients (29.3%). Most lesions were diagnosed at magnetic resonance imaging (56.9%) or computed tomography myelography (32.5%). All cases were treated with decompressive laminectomy and tumor resection, with partial resection (82.1%) more often than complete (15.4%). Adjuvant radiotherapy (83.7%) and/or chemotherapy (10.6%) were often administered. Most patients experienced post-treatment symptom improvement (86.2%) and favorable radiological response (82.9%). ICEM recurrences were reported in 4 cases (8.5%) with median local tumor control of 7 months. At last follow-up, most patients were dead (62.9%) with median overall-survival of 10 months.
CONCLUSION
Patients with ICEMs have poor prognoses and significant tumor burden. Surgery and locoregional radiotherapy may offer optimal clinical and radiological outcomes but have a limited role in improving local tumor control and overall survival.
Topics: Cauda Equina; Humans; Kidney Neoplasms; Magnetic Resonance Imaging; Middle Aged; Radiography; Treatment Outcome
PubMed: 35346985
DOI: 10.21873/anticanres.15643 -
Pain Physician Mar 2021Interventional spine procedures, such as discography, epidural steroid injections (ESIs), facet joint procedures, and intradiscal therapies, are commonly used to treat... (Meta-Analysis)
Meta-Analysis
BACKGROUND
Interventional spine procedures, such as discography, epidural steroid injections (ESIs), facet joint procedures, and intradiscal therapies, are commonly used to treat pain and improve function in patients with spine conditions. Although infections are known to occur following these procedures, there is a lack of comprehensive studies on this topic in recent years.
OBJECTIVES
To assess and characterize infections following interventional spine procedures.
STUDY DESIGN
Systematic review.
METHODS
Studies that were published from January 2010 to January 2020 and provided information on infections or infection rates following discography, ESIs, facet joint procedures, and intradiscal therapies were included. PubMed (Medline), EMBASE, and Cochrane Library databases were searched, according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Infection data were extracted from included studies, and infection rates were calculated for each procedure type. Case reports and infection-only articles were not included in infection rate calculations.
RESULTS
Seventy-two studies met the eligibility criteria and were included in the systematic review. The overall incidence of infection across all studies was 0.12% (231/200,588). The majority of studies (n = 51) were linked to ESIs. Infections related to ESIs were more common than those related to discography or facet joint procedures (0.13% [219/174,431] vs. 0% [0/269] or 0.04% [9/25,697], respectively). Intradiscal therapies had the highest calculated rate of infections (1.05%; 2/191). Quality assessments of the included studies ranged widely.
LIMITATIONS
There was an abundance of case reports in comparison to other study designs; to minimize skewing of the analysis, case reports and infection-only articles were not included in the infection rate. Studies that reported combined infection data for multiple procedures could not be included. Many cohort studies and case series were of lower quality because of their retrospective nature. Additionally, the true incidence of infections related to these procedures is unknown because the majority of these infections often go unreported, and information on regions of the spine and procedure details are often lacking.
CONCLUSIONS
Based on our systematic review, the risk of infections following interventional spine procedures appears to be low overall. More studies focusing on infectious complications with larger sample sizes are needed, particularly for intradiscal therapies, in which the microbiome may be an underlying cause of disc infection. To achieve a true incidence of the risk of infections with these procedures, large prospective registries that collect complication rates are necessary.
Topics: Humans; Myelography; Prospective Studies; Retrospective Studies; Spinal Diseases; Surgical Wound Infection
PubMed: 33740341
DOI: No ID Found