Characteristics of optic canal invasion in the large midline non-tuberculum sellae anterior skull base meningiomas and the surgical outcomes

A high incidence of OCI was observed in the large midline NTSAM. The identification of TS involvement on MRI can serve as a strong predictor of OCI. Therefore, optic canal exploration to remove the optic canal invasion during the surgical removal of these particular tumors should be contemplated to attain radical tumor resection to enhance the possibility of improving visual function and reduce the risk of recurrence.