Owen briefs you on what matters in this week's digest.
Think chief-resident chalk talk: what matters, what changes practice, and where to spend your reading time.
Endovascular / Vascular
Association of baseline infarct size, reperfusion grade and intracranial hemorrhage in patients undergoing thrombectomy.
Research • Endovascular / Vascular • Journal of neurointerventional surgery • 2026-02-16
Why it matters
Long-term safety and durability data inform device selection and follow-up after endovascular procedures.
Teaching pearl
When applying this evidence, confirm the primary endpoint definition and follow-up time in the full text before changing practice.
More context
Key details
- Study type: Randomized trial.
- Sample size: N=1077.
- Follow-up duration: Discussed in PubMed abstract (duration not extracted).
- Composite endpoint: NR (not explicitly stated in PubMed abstract).
- DOI: 10.1136/jnis-2025-023103.
High-yield
Randomized trial, N=1077; intention-to-treat analysis in results; adverse events in safety tables.
Limitations
Design constraint: Trial enrolled N=1077; verify randomization, blinding, and endpoint definitions in full text.Generalizability: Enrollment criteria and center experience may limit applicability to broader practice.
Tumor / Skull Base
Congress of Neurological Surgeons Systematic Review and Evidence-Based Guidelines Update for the Role of Audiologic Screening in the Diagnosis and Management of Patients With Vestibular Schwannomas.
Research • Tumor / Skull Base • Neurosurgery • 2025-06-05
Order MRI to rule out VS in asymmetric SNHL, unilateral tinnitus, or sudden SNHL, but set realistic expectations about the low diagnostic yield.
Study snapshot
Design
Systematic review
Population
Patients presenting with asymmetric sensorineural hearing loss, unilateral tinnitus, or sudden sensorineural hearing loss
Intervention
MRI screening
Comparator
None
Primary outcome
Diagnostic yield of MRI for vestibular schwannoma
Why it matters
Previously, there were no evidence-based guidelines on when to obtain screening MRI for otologic complaints to rule out vestibular schwannoma (VS), leading to variable practice patterns. This systematic review quantifies the low diagnostic yield of MRI for VS in common presentations: 1.68% for asymmetric SNHL, 1.56% for unilateral tinnitus, and 3.66% for sudden SNHL. Clinicians should counsel patients that while MRI is necessary to rule out VS, the vast majority (85%) will have normal scans, and consider this low yield when discussing risks, benefits, and alternatives.
Practice change
Confirms current practice of MRI screening for these symptoms while providing specific yield data for patient counseling.
More context
Key details
- Systematic review of 14 studies with 13,733 patients
- Diagnostic yield of MRI for VS: 1.68% in asymmetric SNHL
- Diagnostic yield: 1.56% in unilateral tinnitus
- Diagnostic yield: 3.66% in sudden SNHL
- 15% of MRIs show abnormal findings leading to diagnoses other than VS
- 85% of patients with these otologic complaints have no structural cause on imaging
- Updates 2018 CNS guidelines with literature through May 2022
High-yield
NR
Clinical context
VS presents with otologic symptoms, but MRI is expensive and may cause patient anxiety. Unclear guidelines led to overuse or underuse of imaging. This review provides evidence-based yield estimates to guide appropriate use.
Limitations
No p-values, confidence intervals, or effect sizes reported in the fact sheetHeterogeneity in study designs and patient populations across included studies
Methodological critique
Comprehensive systematic review following CNS guideline methodology, but limited by lack of statistical measures in reported results.
Teaching pearl
When ordering an MRI for asymmetric hearing loss or tinnitus, tell patients: 'We're looking for a rare tumor, but most likely we'll find nothing—and that's actually good news.'
Funding and COI
NR
Congress of Neurological Surgeons Systematic Review and Evidence-Based Guideline on Hearing Preservation Outcomes in Patients With Sporadic Vestibular Schwannoma: Update.
Research • Tumor / Skull Base • Neurosurgery • 2025-06-05
Why it matters
Guideline and evidence synthesis can standardize diagnostic workup and counseling for skull base tumor patients.
Teaching pearl
When applying this evidence, confirm the primary endpoint definition and follow-up time in the full text before changing practice.
More context
Key details
- Study type: Systematic review.
- Sample size: NR in PubMed abstract.
- Follow-up duration: NR in PubMed abstract.
- Composite endpoint: NR (not explicitly stated in PubMed abstract).
- DOI: 10.1227/neu.0000000000003551.
High-yield
Systematic review; pooled effect size in forest plots; heterogeneity and bias assessment.
Limitations
Design constraint: Evidence synthesis; conclusions depend on included-study quality and heterogeneity.Generalizability: Included cohorts and methods may not match local practice or patient mix.
Spine
P-15 Peptide Enhanced Bone Graft in Transforaminal Lumbar Interbody Fusion: A Randomized, Controlled, Investigational Device Exemption Study Demonstrating Improved Composite Clinical Success.
Research • Spine • Spine • 2025-12-19
Why it matters
Policy and payment trends can influence procedure selection, access to care, and practice sustainability in spine surgery.
Teaching pearl
When applying this evidence, confirm the primary endpoint definition and follow-up time in the full text before changing practice.
More context
Key details
- Study type: Randomized trial.
- Sample size: N=290.
- Follow-up duration: NR in PubMed abstract.
- Composite endpoint: Composite endpoint mentioned in PubMed abstract (details not extracted).
- DOI: 10.1097/BRS.0000000000005579.
High-yield
Randomized trial, N=290; intention-to-treat analysis in results; adverse events in safety tables.
Limitations
Design constraint: Trial enrolled N=290; verify randomization, blinding, and endpoint definitions in full text.Generalizability: Enrollment criteria and center experience may limit applicability to broader practice.
Functional
Deep brain stimulation for obsessive-compulsive disorder: evolution of tractography-based targeting.
Research • Functional • Journal of neurosurgery • 2025-10-31
Why it matters
Functional neurosurgery and epilepsy surgery evidence can inform patient selection and counseling about cognitive outcomes.
Teaching pearl
When applying this evidence, confirm the primary endpoint definition and follow-up time in the full text before changing practice.
More context
Key details
- Study type: Journal article (design NR).
- Sample size: NR in PubMed abstract.
- Follow-up duration: NR in PubMed abstract.
- Composite endpoint: NR (not explicitly stated in PubMed abstract).
- DOI: 10.3171/2025.6.JNS243066.
High-yield
Journal article (design NR); seizure freedom or symptom control; cognitive and functional side effects.
Limitations
Design constraint: Prospective study; verify endpoint definitions and analysis in the full text.Generalizability: Patient selection, institutional practice patterns, and unmeasured confounding may limit applicability.
Basic Science
P2X7R-mediated IL-1β release by human brain tissue: the impact of CNS-penetrant potential therapeutics.
Research • Basic Science • Brain : a journal of neurology • 2026-02-19
Why it matters
Mechanistic work may identify targets that later translate into neurosurgical oncology or neuroregeneration therapies.
Teaching pearl
When applying this evidence, confirm the primary endpoint definition and follow-up time in the full text before changing practice.
More context
Key details
- Study type: Basic science (preclinical).
- Sample size: NR in PubMed abstract.
- Follow-up duration: NR in PubMed abstract.
- Composite endpoint: NR (not explicitly stated in PubMed abstract).
- DOI: 10.1093/brain/awag068.
High-yield
Basic science (preclinical); mechanistic endpoints in methods; not applicable (preclinical).
Limitations
Design constraint: Preclinical study; outcomes may not translate to human neurosurgical patients.Generalizability: Model system and experimental conditions may not reflect clinical disease biology.
From the Preprint Wire
Medium and Long Term Time-to-Event Outcomes After Elective Fenestrated and Branched Endovascular Repair of Complex Abdominal and Thoracoabdominal Aortic Aneurysms: A Contemporary Systematic Review
Preprint • From the Preprint Wire • medrxiv • 2026-02-09
Why it matters
This medrxiv preprint reports findings relevant to neurosurgery. NOT peer-reviewed.
More context
Key details
- Source: medrxiv
- DOI: 10.64898/2026.02.08.26345837
Medium/Long-Term Outcomes of F/BEVAR for Complex Aortic Aneurysms: Systematic Review
Preprint • From the Preprint Wire • medrxiv • 2026-02-09
Why it matters
This preprint provides a contemporary synthesis of survival and durability data for fenestrated/branched endovascular repair (F/BEVAR) of complex abdominal and thoracoabdominal aortic aneurysms, which is highly relevant to neurosurgeons involved in vascular neurosurgery or managing patients with these conditions. As an unreviewed preprint, it offers timely insights but requires cautious interpretation pending peer validation. The findings can inform patient selection and shared decision-making by quantifying the divergence between procedural success and long-term survival.
More context
Key details
- Pooled 5-year outcomes: 96.4% freedom from aneurysm-related mortality, 66.5% freedom from reintervention, 94.8% target vessel patency.
- Median overall survival was 6.36 years, with most late deaths not aneurysm-related.
- Analysis included 24 studies (2000-2025) with reconstructed individual patient data using Kaplan-Meier digitization.
Hybrid ResNet-Capsule Network for Brain Tumor Detection in MRI
Preprint • From the Preprint Wire • medrxiv • 2026-02-09
Why it matters
This preprint presents a novel deep learning approach for automated brain tumor detection and segmentation in MRI scans, which could potentially reduce the time, subjectivity, and error associated with manual analysis in neurosurgical practice. However, as an unreviewed preprint, these findings require independent validation before clinical consideration.
More context
Key details
- Model combines ResNet50 for feature extraction with Capsule Networks to capture spatial hierarchies and pose variations in tumor morphology
- Incorporates a custom 5-cycle dynamic routing algorithm and class weighting scheme to improve segmentation of irregular tumor boundaries and address class imbalance
- Demonstrated superior performance compared to U-Net and pure CNN models on the BraTS2020 benchmark dataset
An Exploratory Study of ResNet and Capsule Neural Networks for Brain Tumor Detection in MRI
Preprint • From the Preprint Wire • medrxiv • 2026-02-09
Why it matters
This medrxiv preprint reports findings relevant to neurosurgery. NOT peer-reviewed.
More context
Key details
- Source: medrxiv
- DOI: 10.64898/2026.02.05.26345460