Surgery of Giant Acoustic Neurinomas: Our Experience

Sergei Spektor; Emil Margolin; Felix Umansky

doi:10.1055/s-2007-983960

Giant Acoustic Neurinomas: A Change of Mind

Skull Base ◽

10.1055/s-2008-1093144 ◽

2008 ◽

Vol 18 (S 01) ◽

Author(s):

Sergey Spektor ◽

Yigal Shoshan ◽

Felix Umansky

Keyword(s):

Acoustic Neurinomas

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T3 and T4 Samii Classification of Acoustic Neurinomas: Detailed Operative Technique and Pitfalls to Preserve the Facial Nerve

Skull Base ◽

10.1055/s-2011-1274243 ◽

2011 ◽

Vol 21 (S 01) ◽

Author(s):

Paulo Pires de Aguiar ◽

Rogério Aires ◽

Romulo Marques ◽

Marcos Maldaun ◽

Antonio Souza Filho ◽

...

Keyword(s):

Facial Nerve ◽

Operative Technique ◽

Acoustic Neurinomas

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Intracanalicular acoustic neurinomas

American Journal of Otolaryngology ◽

10.1016/0196-0709(92)90032-o ◽

1992 ◽

Vol 13 (4) ◽

pp. 245

Keyword(s):

Acoustic Neurinomas

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Intracanalicular Acoustic Neurinomas

Neurosurgery ◽

10.1227/00006123-199108000-00004 ◽

1991 ◽

Vol 29 (2) ◽

pp. 189-199 ◽

Cited By ~ 47

Author(s):

Madjid Samii ◽

Cordula Matthies ◽

Marcos Tatagiba

Keyword(s):

Resonance Imaging ◽

Tumor Removal ◽

Diagnostic Reliability ◽

Computed Tomographic ◽

Acoustic Neurinomas ◽

Vestibular Symptoms ◽

Symptoms And Signs ◽

Facial Function ◽

Complete Tumor

Abstract The cases of 16 patients with acoustic neurinomas confined to the intracanalicular area are presented. These represent 2.7% of the 600 patients with acoustic neurinomas consecutively operated upon at the Neurosurgical Clinic at Nordstadt Hospital during the last 8 years. The comparatively earlier onset of vestibular symptoms and signs was characteristic of this group and precipitated diagnosis. The diagnostic reliability of magnetic resonance imaging was at least equivalent to that of air computed tomographic cisternography. Complete tumor removal was accomplished via the suboccipital approach in all patients, with 100% preservation of facial nerve and facial function; the cochlear nerve was preserved anatomically in 100% of the patients and functionally in 57%. No recurrence has occurred during follow-up periods of up to 8 years in all 16 patients. A broad spectrum of the current literature is considered, and purely intracanalicular acoustic neurinomas are discussed with regard to clinical characteristics, diagnostic steps—including neuroradiological and neurophysiological approaches—and surgical treatment and results.

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Contribution of 3D-MRI in the Management of Acoustic Neurinomas

Skull Base Surgery ◽

10.1159/000429977 ◽

2015 ◽

pp. 816-819

Author(s):

V. Darrouzet ◽

D. Soulie ◽

S. A. Siddiqui ◽

J. Guerin ◽

J. M. Caille ◽

...

Keyword(s):

3D Mri ◽

Acoustic Neurinomas

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Asymmetric Optokinetic Afterresponse in Patients with Small Acoustic Neurinomas1

Journal of Vestibular Research ◽

10.3233/ves-1991-1308 ◽

1991 ◽

Vol 1 (3) ◽

pp. 299-307

Author(s):

Krister Brantberg ◽

Måns Magnusson

Keyword(s):

Vestibular Function ◽

Directional Asymmetry ◽

Optokinetic Stimulation ◽

Optokinetic Afternystagmus ◽

Acoustic Neurinomas ◽

Normal Controls

Directional asymmetry of primary and secondary optokinetic afternystagmus (OKAN I and OKAN II, respectively) was studied in 20 patients with small acoustic neurinomas (⩽20 mm), and results were compared to those for 24 normal controls. The optokinetic afterresponse was induced by 60 s of horizontal whole-field optokinetic stimulation in both directions. Among patients, the optokinetic afterresponse was asymmetric, OKAN I and OKAN II beating toward the lesioned ear being significantly weaker than the OKAN I and OKAN II beating toward the healthy ear. Hence, in these patients with gradual deterioration of vestibular function, the vestibular side-difference was reflected both in OKAN I and OKAN II. Although asymmetry in OKAN I was frequently observed among controls, it was significantly more pronounced among the patients. Moreover, patients could be distinguished by the occurrence of OKAN II, as it did not occur at all among controls exposed to the same stimulation.

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