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- W1975323721 abstract "Introduction: The retrolabyrinthine approach is an alternative in CPA tumor types B and C for hearing preservation. In Germany, this approach is not as commonly used as it is in France, for example by the University Hospital at Bordeaux group. A trepanation of the head as well as a depression of the cerebellum can be avoided by entrance over the petrous bone. Method: The mastoidectomy is performed similarly to the surgical procedure used for the sacrotomy, or its decompression, with uncovering of the lateral semicircular canal. The bony bridge between the dura of the posterior fossa and the semicircular canal has to be removed. In contrast to the literature, the approach, with opening of the dura of the posterior fossa, can be performed with preservation of the upper petrous sinus and the endolymphatic sac. In case of type B tumors with an intracanicular tumor portion, the use of a 30-degree endoscope is mandatory. Results: From 2006 to 2008, 7 patients with a type B or C CPA tumor staged as II or III were treated alternatively by a modified retrolabyrinthine approach alone and by that approach combined with use of an endoscope. In all cases, the tumor was completely removed by preserving the facial and cochlear nerve function. In 3 cases, a navigation system was used to simplify and minimize the surgical approach and to reduce the bone work without uncovering the blue line of the lateral semicircular canal. Discussion: The clinical outcome of our own data compared with the literature showed no differences in 7th and 8th cranial nerve function and complete tumor removal. The additional use of a 30-degree endoscope improves the quality outcome of a complete tumor removal in the internal auditory canal." @default.
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- W1975323721 date "2009-04-01" @default.
- W1975323721 modified "2023-09-25" @default.
- W1975323721 title "Modifications of the Retrolabyrinthine Approach of CPA Tumors for Hearing Preservation" @default.
- W1975323721 doi "https://doi.org/10.1055/s-2009-1222274" @default.
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