Acoustic neuroma other diagnostic studies

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Simrat Sarai, M.D. [2]

Overview

Other diagnostic studies for acoustic neuroma include audiometry, auditory brainstem response test, and electronystagmography.

Electronystagmography

• Electronystagmography (ENG) is a test in which eye movements are recorded with small electrodes placed on the skin around the eyes.
• This test evaluates patient's balance by detecting eye movements while stressing the balance in various ways.
• Electronystagmography (ENG testing) is frequently abnormal in patients with acoustic neuroma.
• Unilateral loss of calorics is associated in about 50% of all tumors.

References

• Evans, D. Gareth R.; Moran, Anthony; King, Andrew; Saeed, S.; Gurusinghe, Nihal; Ramsden, Richard (2005). "Incidence of Vestibular Schwannoma and Neurofibromatosis 2 in the North West of England over a 10-year Period: Higher Incidence than Previously Thought". Otology & Neurotology. 26 (1): 93–7. doi:10.1097/00129492-200501000-00016. PMID 15699726.
• Shin, Masahiro; Ueki, Keisuke; Kurita, Hiroki; Kirino, Takaaki (2002). "Malignant transformation of a vestibular schwannoma after gamma knife radiosurgery". The Lancet. 360 (9329): 309–10. doi:10.1016/S0140-6736(02)09521-1. PMID 12147377.
• Samii, Madjid; Gerganov, Venelin; Samii, Amir (2006). "Improved preservation of hearing and facial nerve function in vestibular schwannoma surgery via the retrosigmoid approach in a series of 200 patients". Journal of Neurosurgery. 105 (4): 527–35. doi:10.3171/jns.2006.105.4.527. PMID 17044553.
• Pollock, Bruce E.; Driscoll, Colin L.W.; Foote, Robert L.; Link, Michael J.; Gorman, Deborah A.; Bauch, Christopher D.; Mandrekar, Jayawant N.; Krecke, Karl N.; Johnson, Craig H. (2006). "Patient Outcomes after Vestibular Schwannoma Management: A Prospective Comparison of Microsurgical Resection and Stereotactic Radiosurgery". Neurosurgery. 59 (1): 77–85, discussion 77–85. doi:10.1227/01.NEU.0000219217.14930.14. PMID 16823303.
• Prasad, Dheerendra; Steiner, Melita; Steiner, Ladislau (2000). "Gamma surgery for vestibular schwannoma". Journal of Neurosurgery. 92 (5): 745–59. doi:10.3171/jns.2000.92.5.0745. PMID 10794287.
• Stangerup, Sven-Eric; Caye-Thomasen, Per; Tos, Mirko; Thomsen, Jens (2006). "The natural history of vestibular schwannoma". Otology & Neurotology. 27 (4): 547–52. doi:10.1097/01.mao.0000217356.73463.e7. PMID 16791048.
• Kanzaki, Jin; Tos, Mirko; Sanna, Mario; Moffat, David A. (2003). "New and modified reporting systems from the consensus meeting on systems for reporting results in vestibular schwannoma". Otology & Neurotology. 24 (4): 642–8, discussion 648–9. doi:10.1097/00129492-200307000-00019. PMID 12851559.
• Tos, Mirko; Stangerup, Sven-Eric; Cayé-Thomasen, Per; Tos, Tina; Thomsen, Jens (2004). "What Is the Real Incidence of Vestibular Schwannoma?". Archives of Otolaryngology–Head & Neck Surgery. 130 (2): 216–20. doi:10.1001/archotol.130.2.216. PMID 14967754.