Benign solitary nerve sheath tumors of the spinal accessory nerve in the posterior triangle of the neck. Report of two cases.

A case of solitary schwannoma and one of solitary neurofibroma originating from the spinal accessory nerve in the posterior triangle of the neck are described. Location of such neoplasms in this region is exceptional. The authors emphasize the importance of accurately enucleating the mass; when it is impossible to preserve the continuity of the neural pathway, nerve repair should be considered.