[Schwannoma of the endothoracic phrenic nerve. General review apropos of a case].

A new case of schwannoma of the intrathoracic phrenic nerve in a 72-year old woman is reported. A review of the literature shows that this tumour is quite exceptional and that its clinical signs are few and non-specific. The most informative examinations, including MRI, merely provide arguments in favour of the diagnosis prior to surgery. The problems of preservation and repair of the phrenic nerve are discussed in the light of new microsurgical techniques. Our knowledge concerning malignant schwannoma and its recurrent forms is updated.