Diagnostic value of the optic nerve sheath subarachnoid space in patients with intracranial hypotension syndrome

Takeuchi, Nobuyasu; Horikoshi, Toru; Kinouchi, Hiroyuki; Watanabe, Akira; Yagi, Takashi; Mitsuka, Kentaro; Senbokuya, Nobuo

doi:10.3171/2012.5.jns1271

Cited by 21 publications

(14 citation statements)

References 21 publications

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“…The cardinal finding is increased intracranial blood volume [35]. Characteristic MRI findings are thickened pachymeninges with contrast enhancement, subdural fluid collections, engorged cerebral veins, rounded dural sinuses, brain sagging, disappearance of the CSF space of the optic nerve sheath and an inferiorly displaced midbrain [35, 36]. These findings are also useful in the follow-up period after treatment.…”

Section: The Role Of Mri In Other Csf Disordersmentioning

confidence: 99%

Evaluation of hydrocephalus and other cerebrospinal fluid disorders with MRI: An update

Kartal¹,

Algın²

2014

Insights Imaging

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MRI is not only beneficial in the diagnosis of cerebrospinal fluid (CSF)-related diseases, but also aids in planning the management and post-surgery follow-up of the patients. With recent advances in MRI systems, there are many newly developed sequences and techniques that rapidly enable evaluation of CSF-related disorders with greater accuracy. For a better assessment of this group of disorders, radiologists should follow the developments closely and should be able to apply them when necessary. In this pictorial review, the role of MRI in the evaluation of hydrocephalus, CSF diversion techniques, and other CSF disorders is illustrated.Teaching Points• The 3D-SPACE seems to be most efficient technique for evaluation of hydrocephalus and ventriculostomy.• In complex cases, PC-MRI, 3D-heavily T2W, and/or CE-MRC images may prevent false results of 3D-SPACE.• MRI is beneficial in the diagnosis and management of hydrocephalus and other CSF-related diseases.

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Section: The Role Of Mri In Other Csf Disordersmentioning

confidence: 99%

Evaluation of hydrocephalus and other cerebrospinal fluid disorders with MRI: An update

Kartal¹,

Algın²

2014

Insights Imaging

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“…The optic nerve sheath is distensible in the retrobulbar region. Clinical and experimental studies in people and monkeys have shown that increases in intracranial pressure cause measurable increases in the optic nerve sheath diameter . Furthermore, optic nerve sheath diameter measurements are highly reliable in people when using magnetic resonance imaging (MRI).…”

Section: Introductionmentioning

confidence: 99%

T2‐weighted Magnetic Resonance Imaging Measurements of Optic Nerve Sheath Diameter in Dogs With and Without Presumed Intracranial Hypertension

Scrivani

Fletcher

Cooley

et al. 2013

Vet Radiology Ultrasound

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Intracranial hypertension is a cause of cerebral ischemia and neurologic deficits in dogs. Goals of this retrospective study were to test interobserver agreement for MRI measurements of optic nerve sheath diameter and associations between optic nerve sheath diameter, signalment data, and presumed intracranial hypertension status in a cohort of dogs. A veterinary radiologist interpreted scans of 100 dogs and dogs were assigned to groups based on presence or absence of at least two MRI characteristics of presumed intracranial hypertension. Two observers who were unaware of group status independently measured optic nerve diameter from transverse T2-weighted sequences. Mean optic nerve sheath diameter for all dogs was 3 mm (1-4 mm). The mean difference between observers was 0.3 mm (limits of agreement, -0.4 and 1.0 mm). There was no correlation between optic nerve sheath diameter and age for either observer (r = -0.06 to 0.00) but a moderate positive correlation was observed between optic nerve sheath diameter and body weight for both observers (r = 0.70-0.76). The 22 dogs with presumed intracranial hypertension weighed less than the 78 dogs without (P = 0.02) and were more often female (P = 0.04). Dogs with presumed intracranial hypertension had a larger ratio of optic nerve sheath diameter to body weight for each observer-side pair (P = 0.01-0.04) than dogs without. Findings indicated that the ratio of MRI optic nerve sheath diameter relative to body weight may be a repeatable predictor of intracranial hypertension in dogs.

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“…Findings on spinal MRI are as follows: distention of the epidural veins (78%), epidural fluid collection (89% of patients) (Fig. It does not denote the site of CSF leakage (false localizing C1/C2 sign) [66,67]. The C1/C2 sign -high signal intensity between the spinous processes of C1 and C2 -is present in 33-67% of patients [70][71][72][73].…”

Section: Magnetic Resonance Imagingmentioning

confidence: 99%

Intracranial hypotension

Urbach

2014

Current Opinion in Neurology

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Diagnostic value of the optic nerve sheath subarachnoid space in patients with intracranial hypotension syndrome

Abstract: Disappearance of the CSF space in the ONS was frequently observed in patients with SIH. This characteristic finding may be useful in the diagnosis of SIH as well as in the evaluation of treatment effectiveness.

Cited by 21 publications

References 21 publications

Evaluation of hydrocephalus and other cerebrospinal fluid disorders with MRI: An update

Evaluation of hydrocephalus and other cerebrospinal fluid disorders with MRI: An update

T2‐weighted Magnetic Resonance Imaging Measurements of Optic Nerve Sheath Diameter in Dogs With and Without Presumed Intracranial Hypertension

Intracranial hypotension

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