The objective of this study was to evaluate the long-term outcomes of patients with Cogan syndrome (CS) who have undergone cochlear implantation. Subjects consisted of 12 cochlear implant users with a typical form of CS. Measures included word and sentence recognition scores. The speech recognition performance was rated before cochlear implantation and at 1 and 5 years after implantation. The speech materials were presented in quiet only condition. The mean 12-month post-operative word and sentence recognition scores were 91.4 and 93.1 %, respectively. Five years after implantation, the group means for word and sentence recognition tests were 94 and 96.3 %, respectively. No patients in this series experienced flap complication or other local or systemic complications. This long-term study on 12 subjects with CS over 5 years of cochlear implant use reveals that cochlear implantation is safe in the long term and provides excellent and stable hearing results.
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