Abstract Otology 2000 C15-1

Caglar Batman MD, Selcuk Inanlý MD, Alper Tutkun MD, Mehmet Ali Pehitoglu MD

ENT Department Marmara University Hospital KBB Klinigi TR-Marmara-Altunizade

Deposition of fibrous or osseous tissue within the fluid spaces of the cochlea is encountered during the operation of some cochlear implant candidates. Imaging techniques such as computed tomography (CT) scanning and magnetic resonance imaging (MRI) give valuable information to detect any abnormality within the cochlea and this influences the applicability, feasibility and success of cochlear implantation. However, on some cochleas no signs of obliteration can be identified with preoparative imaging especially if there are partial fibrous or raw osseous tissues within the cochlea. Fibrosis may represent itself as a liquid nature although the canal was not patent. Four cases were experienced and managed like these unexpected situations. CT and MRI findings are neverthless merely one element in the implantation and intraoperative experiences can modify the procedure.