Neurilemomas and neurofibromas of the upper limb.

Nine cases of solitary nerve neoplasm are reported. They include five neurilemomas and four neurofibromas in the nerve trunks of upper limbs. The neurilemomas were derived from a proliferation of the Schwann cells of a single nerve funiculus and could easily be enucleated from the remaining funicular groups, which remained intact and functioning. The neurofibromas, on the other hand, invaded and destroyed the funicular structure of the nerve, requiring nerve resection or nerve graft to restore continuity.