Electronystagmographic findings in a case of Lermoyez's syndrome.

A 40-year-old female patient with Lermoyez's syndrome is presented. Prior to the vertiginous attack, right low-tone hearing loss and tinnitus were noted. During the vertiginous attack, spontaneous nystagmus was directed to the right (lesioned) side, with improvement of cochlear symptoms. After the vertiginous attack, nystagmus was positional rather than spontaneous, and was directed to the left (opposite) side, with the subsidence of cochlear symptoms. One week later, follow-up audiometry revealed bilateral normal hearing.