[The diagnosis and treatment of a Barré-Masson tumor].

Eighteen patients with Barre-Masson's tumor were operated on. Case reports are presented. Recovery took place in all the patients after the operation.

[Iatrogenic injuries of the peripheral nerves].

Among 388 patients with mononeuropathies staying at the neurosurgical department, lesions of the nerves in 47 were induced by treatment manipulations. This group of iatrogenic neuropathies was made up of 15 cases of injection neuropathies, 19 cases of postoperative and 13 cases of positional end compression neuropathies. 39 patients were operated on.

[Tunnel neuropathies].

Analysis is made of 261 patients operated on for tunnel neuropathies. Of these, there were 152 men and 109 women aged 15 to 82 years, the mean age being 46 years. Among 22 patterns of neuropathy, there dominated compression of the ulnar nerve in the cubital canal (104 patients) and compression of the median nerve in the carpal canal (76 patients) accounting for 69% of all the cases.