Methods
All patients underwent 4‐hour delayed‐enhanced 3D‐FLAIR MR imaging for identifying lesion-side laterality and enhanced labyrinth patterns. Audiologic and vestibular function tests were performed. Vestibular function test sum scores were additionally calculated by summing the scores on each test and defining normal as 0 and abnormal as 1. The hearing recovery was evaluated according to the American Academy of Otolaryngology-Head and Neck Surgery Criteria at 3 months after the end of treatment.