[Neurinomas of the cochlear nerve]. / Neurinomes du nerf cochléaire.

Usually, schwannomas of the eight nerve arise from the vestibular nerve. Yet, the authors have operated from September 1993 to September 1995 three neuromas whose origin is certainly the cochlear nerve. Surgery was performed by retro-sigmoid approach magnified by endoscopic procedure of the cerebello-pontine angle before and after removing the tumor. We report here the cases and the literature is documented. Similar cases of observing cochlear neuromas at the moment of the procedure are exceptional. Because of more and more early diagnosis of these tumors, advances of microsurgery in ponto-cerebellar angle and endoscopic improvements in this area, observation of this kind of pathology could be more and more frequent.

[Neurofibroma of the recurrent nerve: apropos of a case]. / Neurofibrome du nerf recurrent: à propos d'un cas.

A case of solitary benign neurofibroma of the recurrent laryngeal nerve is presented. The preoperative diagnosis was in favour of a thyroid cancer. The discovery of this benign tumour leads to discuss the malignancy criteria of a cold nodule. The recurrential paralysis is an evidence of malignancy in only about 80% of cases. The surgical operation is the best treatment because it allows the histology that asserts the benignancy of the lesion. The review of the literature confirms the exceptional nature of this tumour. The respective histology of neurofibromas is finally briefly recalled.