[Total or partial ablation in surgery of acoustic neuroma].

The authors present the indications of partial or subtotal versus total removal of acoustic tumors and the removal prognosis of recurrence with methods of post surgical control.

[Tomodensitometry and/or meato-isternography in the diagnosis of small acoustic neuromas (author's transl)].

Tomodensitometry allowed us to discover smaller and smaller tumors in the cistern and even in the internal auditory canal. We report 5 cases, amongst others, where the tumor is visible in the canal and we show the conditions which are necessary to make the diagnosis. Nevertheless, lipiode meatocisternography is well tolerated if we use between 0.

[Contribution of radiography and gammagraphy to the monitoring of the development of psychoses].

The authors emphasize the frequency of intracranial tumors in psychiatric patients. They make a distinction between the rare cases of psychiatric patients with intracranial tumors and the even most-frequent cases of tumors that express themselves through psychiatric disorders. According to the authors, the most important detection-tests are the brain scan and, more recently, the EMI scan or tomodensitometer.

[Opaque meato-cisternography in study of atypical or incomplete syndromes of cerebellopontile angle (value for diagnosis and early treatment of neurilemmoma of the 8)].

It is well-known today that there is a cisternal "no man's land" between the petrous bone and the cerebral trunk in which a tumour can develop insidiously. The clinical signs are very variable and often in contradiction with those described for larger tumours. Tomodensimetry is indicated, but it is not conclusive if the mass is limited to the internal auditory canal or if it extends into the angle for less than 15 mm.

[Giant aneurysm of the basilar trunk presenting as essential facial neuralgia].

One case of trigeminal neuralgia and operative giant basilar aneurism is reported. This feature is quite rare, this case however emphasizes the importance of further investigations before surgery, especially if a direct approach is considered.