High Altitude Alternobaric Facial Palsy: Case Series and Systematic Review of the Literature.

Background: Alternobaric facial palsy (AFP) is a rare phenomenon which occurs in patients with Eustachian tube dysfunction, a dehiscent facial canal, and subsequent compression induced ischemic neuropraxia of the facial nerve upon exposure to atmospheric pressure changes. There are few documented cases of AFP and most relate to underwater diving. There is limited understanding in the literature of AFP in the setting of high altitude, leading to a potential for misdiagnosis and inappropriate management.