This Article  • References  • Full text PDF  • Reply to article  • Send to a friend  • Save in My Folder  • Save to citation manager  • Permissions  Citing Articles  • Contact me when this article is cited  Related Content  • Similar articles in this journal  Social Bookmarking   What's this?

A New Clinical Entity

Mirko Tos, MD; Dominika Drozdziewicz, MD; Jens Thomsen, MD

Arch Otolaryngol Head Neck Surg. 1992;118(2):127-133.

Abstract
• The medial acoustic neuroma, a new clinical entity, is defined as an extrameatal tumor without tumor mass laterally in the internal acoustic meatus. During a 12-year period in Denmark, in a prospective analysis of 400 acoustic neuromas on which surgery was performed by the translabyrinthine approach, 48 tumors (12%) were medial tumors, corresponding to an incidence of 0.8 tumors per million inhabitants per year. Analysis of the symptoms and results showed that medial tumors are generally larger with more severe involvement of the cerebellum, the trigeminal nerve, and the brain stem, compared with the 352 nonmedial tumors. Because of its onset in the medial part of the vestibular nerve, the tumor may grow silently and to a considerable size without any widening of the internal auditory canal and with relatively good hearing. Meaningful hearing preservation is impossible in medial tumors, because the smallest medial tumor (subject's hearing, 40 dB or better) measured 3 cm, and the majority of tumors are giant tumors.

(Arch Otolaryngol Head Neck Surg. 1992;118:127-133)

Author Affiliations
From the Department of Otorhinolaryngology, University of Copenhagen (Denmark) and Gentofte Hospital, Hellerup, Denmark.

Footnotes
Accepted for publication May 9, 1991.

Reprint requests to Department of Otorhinolaryngology, Gentofte Hospital, Niels Andersen Vej 65, DK-2900 Hellerup, Denmark (Dr Tos).

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter     What's this?