Open AccessPure intra-optic canal schwannoma: Report of two cases
Author(s) -
Sayuru Miyamura,
Satoshi Yamaguchi,
Masaaki Takeda,
Takafumi Mitsuhara,
Masahiro Hosogai,
Kazuhiko Sakamoto,
Kaoru Kurisu
Publication year - 2017
Publication title -
asian journal of neurosurgery
Language(s) - English
Resource type - Journals
ISSN - 2248-9614
DOI - 10.4103/1793-5482.185071
Subject(s) - optic canal , schwannoma , medicine , optic nerve , craniotomy , visual field , meningioma , anatomy , surgery , ophthalmology
We report two cases of "pure intra-optic-canal schwannoma." The first patient was a 67-year-old female who presented with a visual field defect and visual impairment in the right eye, and the second patient was a 17-year-old female with progressive visual impairment. Both patients underwent tumor resection through frontotemporal craniotomy combined with extradural anterior clinoidectomy and unroofing of the optic canal. The tumors were not attached to the optic nerve (ON) and were located exclusively inside the optic canal. In both cases, the histological diagnosis was schwannoma. Although the origin of pure intra-optic-canal schwannoma is controversial, intra-operative findings suggested that in these cases, the tumors arose from the sympathetic nerve around the ON.