Delayed facial nerve palsy after endolymphatic sac surgery.

Data on delayed facial nerve palsy (DFNP) following endolymphatic sac enhancement surgery are limited. We conducted a retrospective chart review to determine the incidence, possible predisposing factors, treatment, and prognosis of DFNP in such cases. We reviewed the records of 779 patients who had undergone endolymphatic sac surgery for intractable Ménière disease from January 1997 through December 2007 at a tertiary care otologic referral center.