[Chorda tympani neuroma].

This was a 45-year-old woman that initially consulted for a progressive hearing loss and dizziness of some 6 months of evolution. There were no notable relevant antecedents, while in the physical examination the otoscopy showed a greyish image that protruded in the posterior tympanic areas (Fig. 1a). The preoperative audiometry reflected a nixed right hearing loss with a mean loss in conversational airway frequencies of 45 dB. Facial function was intact. The patient did not report any changes in her sense of taste. Radiological study using computed axial tomography (CAT scan) revealed a mass in the right tympanic box adjacent to the third segment of the facial nerve but independent of it (Fig. 1b and c). This mass occupied the epitympanum, surrounding the ossicular chain, without lytic images at this level. Differential diagnosis, using this technique, was considered from cholesteatoma, jugulotympanic glomus and neurinoma of the facial nerve.