Abstract
A 71-year-old woman had complained of vertigenous attacks three times during this decade, ataxic deviation in walking and tinnitus in the right ear with normal hearing. The intracanalicullar acoustic neuroma was most strongly suspected because of the abscent caloric reaction and slight dilation of the right internal auditory canal in Stenver's view. Meatocysternography was performed and yielded a small non-filling space.
During surgical treatment with a suboccipital approach, no acoustic tumor was noted but a neurovascular compression of the arterial loop to the root of the vestibular nerve was revealed. The gelatin foam was placed to keep the compressed loop away from the nerve trunk as a prosthesis. After an uneventful postoperative course, nystagmus, ataxia and tinnitus were alleviated.
