SPECIFIC NERVE SHEATH TUMOR OF ORBIT (NEURILEMMOMA, NEURINOMA)

Abstract
The purpose of this paper is to report a case of orbital neurilemmoma and to present a review of the literature. The growth in question is of nerve sheath origin, solitary and encapsulated with a specific histologic appearance. Its precise cell origin is uncertain, which accounts for the bewildering array of names assigned to it—neuroma, glioma, neurinoma,1 perineurial fibroblastoma,2 neurofibroma, schwannoma,3 palisaded neurinoma4 and lemmoma. In 1935, Stout5 sought a compromise in the name neurilemmoma, an expression indicating its accepted nerve sheath origin and avoiding reference to the controversial specific progenitor. Neurilemmoma has been reported as occurring in both the peripheral6 and the central nervous system.6 Recently De Santo7 encountered the growth in bone. We have reviewed all references8 in the literature to tumor of the orbital nerve and were able to find only 11 cases in which the growth

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