Posture and central compensation after acoustic neurinoma surgery.

After acoustic neurinoma surgery via the enlarged middle cranial fossa approach the patients usually benefit from a good prognosis of the vestibular compensation, almost independent of the size of the tumour and of the patient's age, if the central vestibular pathways were not injured. Only 8% of the patients showed a reduced vestibular compensation. The success and gradation of the vestibular compensation in diseases with a permanent labyrinthine loss, even though after acoustic neurinoma surgery, can easily be classified by the so-called vestibular-index.