Two cases of Tullio phenomenon in which oval and round window reinforcement surgery was effective

To report the effect of oval and round window reinforcement surgery performed in two patients with the Tullio phenomenon. Case 1: A male with bilateral superior canal dehiscence syndrome. Downbeat nystagmus with leftward horizontal eye movement was recorded in an electronystagmogram using a pure-tone sound of 110dB at 2000 or 4000Hz in the right ear. Case 2: A female who had undergone stapes surgery. Computed tomography revealed an ossicular prosthesis in the vestibule. An audiogram indicated mild to moderate hearing impairment in the right ear.

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