[Cochleovestibular syndrome disclosing dolicho-ectasis of the basilar trunk and vertebral artery]. / Syndrome cochléo-vestibulaire révélant une dolicho-ectasie du tronc basilaire et de l'artère vertébrale.

The authors present a case of a cochleovestibular syndrome with a scanner showing a calcified dolico-ektasis of the basilar truncus and the left vertebral artery. The patient had typical Ménière's disease symptomatology. A retrolabyrinthic diagnosis with substantial recruitment was indicated by the results of the audio-vestibular explorations (stapedius reflex, electroculography, early brainstem evoked response, electrocochleography). The electrocochleography with glycerol test indicated labyrinthic hydrops. Finally, some reflections on the role of neurovascular problems in the pathogeny of some cochleovestibular syndromes are put forward.

[Auditory electrophysiology and retrolabyrinthine non-tumorous diseases]]. / L'électrophysiologie dans les atteintes rétrocochléaires sans tumeur.

The authors present 55 cases of non-tumoral retrocochlear impairment, studied over the period between 1984 and 1988 in the ENT University Clinic of Bordeaux. Deafness was the most frequent symptom leading patients to come for consultation (89%). The stapedial reflex was pathological in 70% of the cases. No conclusion could be drawn from electro-occulography. Only the early auditory evoked responses made it possible to reach the diagnosis of retrocochlear impairment in 35% of the cases. Electrocochleography was required in 65% of the cases to establish the topographic diagnosis. The neuro-radiological examination proved to be negative in 48 cases, and positive in 7 cases (6 atrophic symptoms, 1 left vertebral dolichoartery). Among the other etiologies, we noted 14 cases of auditory trauma, 12 vascular pathologies, 9 neurological pathologies, 7 cases of Ménière's disease, and 7 sudden onsets of deafness. The incidence of vasculo-nervous conflict reported by other authors appears very low in this series (with only 1 case).