The author reports the case of a women 45 years old, with arterial hypertension, with the history of dizziness and progressive deafness of left side. The neurological examination showed a pontine syndrome (right side touch and pain hypoesthesia, without disturbance on the right side of the face; right side hemiparesis with sensory type of ataxia; hypoacusia; paresis of the left abducens nerve; vertigo and horizontal nystagmus at right gaze). Necropsy showed a tumor on the left pons surrounded by a softening. The tumor was in close relation with intrapontine fibers of the 8th. nerve and showed the histological features of neurinomata. The histology showed lesion of the thalamo-olivary tract and the so-called "hypertrophic" degeneration of the inferior oliva.