Pathology of the Vestibulocochlear Nerve

Swartz, Joel D.

doi:10.1016/j.nic.2008.02.001

Cited by 15 publications

(11 citation statements)

References 52 publications

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“…The oVEMPs testing reflects the function of the utricle, which connects to the IVN. The absence of an oVEMP may possibly indicate tumor involvement of the IVN [4]. The 3D-FIESTA oblique sagittal MR images of the affected side in the patients of Patients 1 and 2 showed severe atrophy of the IVN in comparison with the FN and SVN.…”

Section: Discussionmentioning

confidence: 88%

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Evaluation of vestibulocochlear nerves in cases with acoustic schwannoma by direct sagittal oblique 3D-FIESTA MR imaging

Taiji¹,

Okamoto²,

Kanzaki³

2017

Otorhinolaryngol Head Neck Sur

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Oblique sagittal MRI with 3D-FIESTA (3-D fast imaging employing steady-state acquisition) sequences can be obtained through the internal auditory canal (IAC) without relying on multi-planar reconstructions. The high spatial resolution direct sagittal oblique imaging technique is useful for the identification of the four intracanalicular nerves. This work included one case of IAC tumor and two cases of cerebellopontine angle (CPA) tumors. MR imaging using a 3D-FIESTA sequence was performed in the oblique sagittal plane perpendicular to the course of the IAC. The direct sagittal oblique imaging technique allowed clear delineation of the individual nerves of the IAC. In a case of acoustic schwannoma, which was surgically proven to originate from the inferior vestibular nerve (IVN), the results of vestibular assessment indicated an IVN pathology. Acquired cochlear nerve hypoplasia with moderate hearing loss was found in a case of CPA tumor.

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Section: Discussionmentioning

confidence: 88%

“…In contrast to the high T2 signal of cerebrospinal fluid, acoustic schwannomas show low T2 signal intensity [4]. Imaging of the temporal bone with 3D-FIESTA sequences in patients presenting with hearing loss, tinnitus, vertigo, and peripheral facial palsy has previously demonstrated positive findings in 18.37% of patients [5].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of vestibulocochlear nerves in cases with acoustic schwannoma by direct sagittal oblique 3D-FIESTA MR imaging

Taiji¹,

Okamoto²,

Kanzaki³

2017

Otorhinolaryngol Head Neck Sur

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“…This is a benign tumor arising in 85% of cases in the vestibular nerve (inferior or superior branch) and in 15% of cases in the cochlear nerve 6 . In 1 to 2% of patients with SSNHL, a CPA or IAC tumor is found 7 .…”

Section: Resultsmentioning

confidence: 99%

“…This may happen due to either cochlear nerve involvement or compression, and due to compression or occlusion of the internal auditory branch of the anterior inferior cerebellar artery 6 . VCS mainly arises near the internal acoustic pore in the region of Scarpa's ganglion at the glialSchwann junction.…”

Section: Resultsmentioning

confidence: 99%

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Sudden Sensorineural Hearing Loss: MR Imaging

et al. 2010

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Hearing loss greater than 30 dB over three contiguous pure-tone frequencies occurring within a three day period is defined as sudden hearing loss. It is usually sensorineural (SSNHL), unilateral and appears as an otologic emergency. SSNHL has many possibile etiologies such as: labyrinthine viral infection, ischemic or hemorrhagic illness, trauma, immuno-mediated inner ear disease, tumor, inner ear malformation, and an imbalance between perilymphatic and endolymphatic fluid pressure. Nevertheless in almost 80% of cases SSNHL belongs to the idiopathic category because the etiology is unknown. The aim of this study was to test the diagnostic impact of two MR devices. Fifteen cases of SSNHL studied with a 1.5 T unit in our hospital between January 2006 and December 2008 within two weeks of the onset were retrospectively evaluated. Since January 2009 three more patients affected by SSNHL have been scanned with a 3T MR unit. We discuss the diagnostic sensitivity, clinical usefulness and the cost-benefit ratio of the MR systems.

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Comparison of a new high-resolution monolithic column with core-shell and fully porous columns for the analysis of retinol and α-tocopherol in human serum and breast milk by ultra-high-performance liquid chromatography†

et al. 2013

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The reduction of analysis time, cost, and improvement of separation efficiency are the main requirements in the development of high-throughput assay methods in bioanalysis. It can be achieved either by ultra-high-performance liquid chromatography (UHPLC) using stationary phases with small particles (<2 μm) at high back pressures or by using opposite direction--monolithic stationary phases with low back pressures. The application of new types of monolithic stationary phases for UHPLC is a novel idea combining these two different paths. The aim of this work was to test the recently introduced second-generation of monolithic column Chromolith® HighResolution for UHPLC analysis of liposoluble vitamins in comparison with core-shell and fully porous sub-2 μm columns with different particle sizes, column lengths, and shapes. The separation efficiency, peak shape, resolution, time of analysis, consumption of mobile phase, and lifetime of columns were calculated and compared. The main purpose of the study was to find a new, not only economical option of separation of liposoluble vitamins for routine practice.

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Pathology of the Vestibulocochlear Nerve

Cited by 15 publications

References 52 publications

Evaluation of vestibulocochlear nerves in cases with acoustic schwannoma by direct sagittal oblique 3D-FIESTA MR imaging

Evaluation of vestibulocochlear nerves in cases with acoustic schwannoma by direct sagittal oblique 3D-FIESTA MR imaging

Sudden Sensorineural Hearing Loss: MR Imaging

Comparison of a new high-resolution monolithic column with core-shell and fully porous columns for the analysis of retinol and α-tocopherol in human serum and breast milk by ultra-high-performance liquid chromatography†

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