1. Acoustic schwannoma with intracochlear extension and primary intracochlear schwannoma: removal through translabyrinthine approach with facial bridge cochleostomy and transcanal approach
- Author
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Alessandro Martini, Elisabetta Zanoletti, Antonio Mazzoni, and Chiara Faccioli
- Subjects
Adult ,Male ,Neoplasm, Residual ,Tympanic Membrane ,Radical Tympanomastoidectomy ,Schwannoma ,Resection ,03 medical and health sciences ,0302 clinical medicine ,Transotic approach ,otorhinolaryngologic diseases ,medicine ,Humans ,Neoplasm Invasiveness ,030223 otorhinolaryngology ,Acoustic Schwannoma ,Cochlea ,Ear Neoplasms ,Retrospective Studies ,Translabyrinthine approach ,medicine.diagnostic_test ,business.industry ,Dissection ,Magnetic resonance imaging ,General Medicine ,Anatomy ,Neuroma, Acoustic ,Middle Aged ,medicine.disease ,Magnetic Resonance Imaging ,Outcome and Process Assessment, Health Care ,Otorhinolaryngology ,Italy ,Ear, Inner ,Female ,sense organs ,business ,Otologic Surgical Procedures ,030217 neurology & neurosurgery ,Ear Canal ,Neurilemmoma - Abstract
Intracochlear schwannomas can occur either as an extension of a larger tumor from the internal auditory canal, or as a solitary labyrinthine tumor. They are currently removed via a translabyrinthine approach extended to the basal turn, adding a transotic approach for tumors lying beyond the basal turn. Facial bridge cochleostomy may be associated with the translabyrinthine approach to enable the whole cochlea to be approached without sacrificing the external auditory canal and tympanum. We describe seven cases, five of which underwent cochlear schwannoma resection with facial bridge cochleostomy, one case with the same procedure for a suspect tumor and one, previously subjected to radical tympanomastoidectomy, who underwent schwannoma resection via a transotic approach. Facial bridge cochleostomy involved removing the bone between the labyrinthine and tympanic portions of the fallopian canal, and exposing the cochlea from the basal to the apical turn. Patients' recovery was uneventful, and long-term magnetic resonance imaging showed no residual tumor. Facial bridge cochleostomy can be a flexible extension of the translabyrinthine approach for tumors extending from the internal auditory canal to the cochlea. The transcanal approach is suitable for the primary exclusive intralabyrinthine tumor. The indications for the different approaches are discussed.
- Published
- 2016