ArticleNeuroradiology2025
Brain herniation into arachnoid granulations: an underrecognized posterior fossa finding.
Article in Neuroradiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Comments on Idiopathic brain herniations in children: anatomical distribution and clinical correlation in the largest pediatric MRI series.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2026Article
- Letter to the Editor regarding "Idiopathic brain herniations in children: anatomical distribution and clinical correlation in the largest pediatric MRI series".Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2026Article
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3 authors.
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Abstract
purposeTo evaluate the prevalence, imaging characteristics, and associated findings of brain herniation into arachnoid granulations (BHAG) using the 3D driven equilibrium (DRIVE) sequence on a 3T MRI system. MATERIALS AND
methodsThis retrospective study included 695 patients who underwent temporal MRI between January and May 2024. Imaging findings were reviewed by two experienced radiologists. BHAG prevalence, locations, associated parenchymal damage (gliosis/encephalomalacia), and detectability with conventional MRI sequences were assessed. Demographic data and clinical information were also recorded.
resultsBHAG was identified in 7.3% of cases (51/695) in the posterior fossa. Patients with BHAG were older than those without (p=0.003), with no gender preference (p=0.259). Cerebellar herniations were most frequent (47.1%), followed by temporal (45.1%) and occipital lobe herniations (17.6%). Parenchymal damage was observed in 25.5% of patients with BHAG. BHAG was undetectable with conventional MRI sequences in 40% of cases.
conclusionBHAG is a common incidental finding in brain MRI and presumably not associated with any symptoms. 3D-DRIVE sequence has a higher sensitivity, particularly with the high-field imaging systems, in the detection of BHAG.
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