Awoman in her 40swas referred for an 8-day history of left facial nerve paralysis, left-ear hearing loss, and vertigo. Three days after her paralysis started, she noticed left ear painwith clear discharge. She had no prior episodes of hearing loss or imbalance, and there was no significant medical history. Findingsfromthepatient’sphysicalexaminationwerenotablefor acomplete left facialparalysis (House-Brackmanngrade6/6)anderythematous skin in the left external auditory canal and conchal bowl withmultiple lesionsthathadcrustedover (Figure,A[unaffectedear] andB [affectedear]).Her tympanicmembranewas intact, and there was no middle ear effusion. Audiometric evaluation revealed mild asymmetric left sensorineural hearing loss with a word recognition score of 92% for the left ear and 100% for the right ear. Because of thisasymmetry,magnetic resonance imaging(MRI)of the internalauditorycanalswithgadoliniumcontrastwasperformed.AnaxialpostgadoliniumT1-weighted sequencewith fat suppression revealedenhancement of the left facial nerve within the internal auditory canal andfallopiancanal (Figure,C).The left cochlearandvestibularnerves were also enhancing, as well as the left basal turn of the cochlea. What is your diagnosis? A