[Non-acoustic parastemal schwannomas: results of treatment].

The paper presents the results of treatment in 15 cases with non-acoustic parastemal schwannomas, which amounts to 4.3% in this histological subgroup. Among them, there were 7 (2.

[Saccular aneurysm of the anterior-inferior (middle cerebellar)--internal auditory artery].

On the basis of data in the literature (4 cases) and one case observed by the authors themselves, a clinical characteristics is given of the rarely encountered aneurysm of the middle cerebellar-internal acoustic arteries. In the absence of subarachnoid hemorrhage the aneurysm produces a typical picture of neurinoma of the acoustic nerve. The patient described was operated on with the use of a surgical microscope.

[Spontaneous and experimental vestibular activity following total removal of neurinomas of the auditory nerve].

Spontaneous and experimental vestibular activity in 84 patients after total resection of neurinomas of the acoustic nerve is analysed. In the immediate postoperative period the frequency of marked manifestations of spontaneous vestibular activity reduced sharply, but spontaneous nystagmus persisted in 97.5% of patients.

[Total removal of acoustic neurinoma].

The analysis is based on the results of a total removal of acoustic neurinomas in 120 patients operated on in 1967-1975. The facial nerve was preserved after surgery in 65 patients (54.2%).