Abstract
A series of 57 patients affected either by optic nerve sheath meningiomas (15 patients) or by secondary meningiomas extending into the orbital apex or optic canal (42 patients) has been reviewed. Proptosis (80%), progressive visual loss (76%), and visual fields defects (63%) were the most common pre-operative complaints. All patients underwent transcranial surgery. Radical tumour resection was possible in 9 out of 15 primary and 22 out of 32 secondary tumours. Overall, 27% of the patients obtained improved postoperative visual acuity, 62% remained unchanged, and 11% were worse. The postoperative visual outcome was related to the degree of pre-operative visual impairment. In a period between 38 and 68 months, 5 meningiomas recurred. The time to progression of partially resected lesions ranged between 9 and 68 months.
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