Endoscopic Decompression of the Labyrinthine Segment of the Facial Nerve.

Objective: To describe the outcome and feasibility of an exclusive endoscopic transcanal transpromontorial approach (ETTA) for decompression of the labyrinthine segment of the facial nerve (LSFN). Patient: A 60-year-old man with a left-sided transverse fracture of temporal bone involving the LSFN, resulting in a grade VI House-Brackmann (HB) facial palsy, associated with ipsilateral total sensorineural hearing loss. Intervention: Surgical decompression of the LSFN by ETTA. Main outcome measure: The patient underwent ETTA which allowed complete exposure and decompression of the LSFN. Results: One year postoperatively, the patient had recovered with House-Brackmann grade II facial function. Conclusion: ETTA can be considered a valuable and appropriate technique for posttraumatic decompression of LSFN, associated with unilateral total sensorineural hearing loss. The procedure resulted in significant facial nerve function improvement. ETTA should be considered both a scarless, mastoid conserving and less invasive surgical technique for posttraumatic LSFN decompression associated with pre-existing cochlear impairment.